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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ifrs-full_RestrictedCashAndCashEquivalents" xlink:to="ifrs-full_RestrictedCashAndCashEquivalents_lbl" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="chw_ScheduleOfExplorationAndEvaluationAssetsTableTextBlock" xlink:to="chw_ScheduleOfExplorationAndEvaluationAssetsTableTextBlock_lbl" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="chw_ExplorationAndEvaluationExpenditureCapitalised" xlink:to="chw_ExplorationAndEvaluationExpenditureCapitalised_lbl" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsAbstract" xlink:to="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsAbstract_lbl" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="chw_PercentageOfDrillingServicesInvoicesCostsToBeRecovered" xlink:to="chw_PercentageOfDrillingServicesInvoicesCostsToBeRecovered_lbl" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="chw_DisclosureOfDetailedInformationAboutCashAndCashEquivalentsExplanatoryTextBlock" xlink:to="chw_DisclosureOfDetailedInformationAboutCashAndCashEquivalentsExplanatoryTextBlock_lbl" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="chw_DisclosureOfRight-of-UseAssetsTextBlock" xlink:to="chw_DisclosureOfRight-of-UseAssetsTextBlock_lbl" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="chw_AmountOfCost" xlink:to="chw_AmountOfCost_lbl" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="chw_AccumulatedAmortisation" xlink:to="chw_AccumulatedAmortisation_lbl" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="chw_ImpairmentExplorationAndEvaluationAssets" xlink:to="chw_ImpairmentExplorationAndEvaluationAssets_lbl" />
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at the end of the year</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at the beginning of the year</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Lease liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total lease liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Lease liabilities [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfInvoiceByLessor_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount of Invoice by Lessor</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfInvoiceByLessor_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of invoice by lessor.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_LeasePaymentsFallingDueAndTransferredToTradeAndOtherPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liabilities to trade and other payables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_LeasePaymentsFallingDueAndTransferredToTradeAndOtherPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Payments Falling Due and Transferred to Trade and Other Payables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_LeasePaymentsFallingDueAndTransferredToTradeAndOtherPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of lease payments falling due and transferred to trade and other payables.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PresentationOfLeasesForLesseeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease liabilities [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfEmployeeBenefitsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit obligations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfEmployeeBenefitsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of employee benefits [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NotesAndOtherExplanatoryInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefit Obligations [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Employee Benefit Obligations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of defined benefit plans [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfEmployeeBenefitObligationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Employee Benefit Obligations [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentProvisionsForEmployeeBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Annual leave (current)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentProvisionsForEmployeeBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit obligations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentProvisionsForEmployeeBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current provisions for employee benefits</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentProvisionsForEmployeeBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Long service leave (non-current)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentProvisionsForEmployeeBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit obligations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentProvisionsForEmployeeBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-current provisions for employee benefits</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProvisionsForEmployeeBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProvisionsForEmployeeBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Provisions for employee benefits</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contributed Equity [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contributed equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of share capital, reserves and other equity interest [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfReservesWithinEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reserves [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfReservesAndOtherEquityInterestExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reserves</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfReservesAndOtherEquityInterestExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of reserves within equity [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Share Capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of classes of share capital [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfMovementsInOrdinaryShareCapitalTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Movements in Ordinary Share Capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfMovementsInOrdinaryShareCapitalTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of Movements in Ordinary Share Capital [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfMovementsInOrdinaryShareCapitalTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of movements in ordinary share capital.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfSharesIssuedAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Share Capital [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfSharesIssuedAndFullyPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of ordinary shares, fully paid</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfSharesIssuedAndFullyPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning Balance, Number of Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfSharesIssuedAndFullyPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance, Number of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfSharesIssuedAndFullyPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of shares issued and fully paid</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfSharesIssuedAndFullyPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amount of ordinary shares fully paid</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfSharesIssuedAndFullyPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beginning Balance, Amount of Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfSharesIssuedAndFullyPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance, Amount of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfSharesIssuedAndFullyPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount of Shares Issued and Fully Paid</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfSharesIssuedAndFullyPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of shares issued and fully paid.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_MovementsInOrdinaryShareCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Movements in Ordinary Share Capital [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfReservesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Reserves</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfReservesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Reserves [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfReservesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire tabular disclosure of reserves.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DateOfOrdinaryShareCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Date of ordinary share capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DateOfOrdinaryShareCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Date of Ordinary Share Capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DateOfOrdinaryShareCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Date of ordinary share capital.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IssueOfConvertibleInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of Class A performance rights, Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IssueOfConvertibleInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Grant-date fair value of conversion rights</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IssueOfConvertibleInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issue of convertible instruments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ConversionOfPerformanceRights_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of Class A performance rights, Number of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ConversionOfPerformanceRights_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Conversion rights of rights</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ConversionOfPerformanceRights_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion Of Performance Rights</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ConversionOfPerformanceRights_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Conversion shares of class a performance rights.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfPlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Placement, Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfPlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount of Placement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfPlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of placement.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesOfPlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Placement , Number of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesOfPlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares of Placement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesOfPlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares of placement.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfTransferFromShareBasedPaymentsReserveOnExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfer from the share-based payments reserve on exercise of options, Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfTransferFromShareBasedPaymentsReserveOnExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Share-based payments reserve to contributed equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfTransferFromShareBasedPaymentsReserveOnExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount of Transfer from Share Based Payments Reserve on Exercise of Options</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfTransferFromShareBasedPaymentsReserveOnExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of transfer from share based payments reserve on exercise of options.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesOfTransferFromShareBasedPaymentsReserveOnExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfer from the share-based payments reserve on exercise of options, Number of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesOfTransferFromShareBasedPaymentsReserveOnExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares of Transfer from Share Based Payments Reserve on Exercise of Options</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesOfTransferFromShareBasedPaymentsReserveOnExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares of transfer from share based payments reserve on exercise of options.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Share issue transaction costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Share issue transaction costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (decrease) through share-based payment transactions, equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share issue transaction costs, Number of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfSharesIssued_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Number of shares issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total number of shares issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options exercised, Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from exercise of options</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from exercise of options</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesOfOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options exercised, Number of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesOfOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares of Options Exercised</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesOfOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares of options exercised.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ParValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options exercise price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ParValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Issue price per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ParValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Par value per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of classes of share capital [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfShareCapitalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of share capital [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfShareCapitalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of share capital [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Movements in Ordinary Share Capital [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of classes of share capital [line items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ConversionOfClassAPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion of Class A Performance Rights [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TranchesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tranches [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TranchesOneAAndOneBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranches 1a and 1b [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TranchesOneAAndOneBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tranches One A and One B[Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TranchesTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranches 2 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TranchesTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tranches Two [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TranchesOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranches 1 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TranchesOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tranches One [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OptionsExercisedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Options exercised [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_Share-BasedPaymentsReserveOnExerciseOfOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payments Reserve on Exercise of Options [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ShareIssueTransactionCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Issue Transaction Costs [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RangeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_BottomOfRangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bottom of Range [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_BottomOfRangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bottom of range [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TopOfRangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Top of Range [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TopOfRangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Top of range [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CapitalCommitmentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfCommitmentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfCommitmentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of commitments [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Median [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfPurchaseCommitmentsExplanatoryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Commitments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfPurchaseCommitmentsExplanatoryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Purchase Commitments Explanatory [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfPurchaseCommitmentsExplanatoryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of disclosure of purchase commitments explanatory.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfCommitmentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Commitments [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfCommitmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Commitments [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_Mota-EngilGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mota-Engil Group [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_NetOfCreditsAMount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net of credits amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_NetOfCreditsAMount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net of Credits AMount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_NetOfCreditsAMount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of net of credits.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RentalExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rental expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OrdinarySharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ordinary Shares [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OrdinarySharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ordinary shares [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_NumberOfSubscribedShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subscribed shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_NumberOfSubscribedShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Subscribed Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_NumberOfSubscribedShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of subscribed shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfSubscribedShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of subscribed shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfSubscribedShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount of Subscribed Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfSubscribedShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of subscribed shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassFPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class F [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassFPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class F Performance Rights [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassEPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class E [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassEPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class E Performance Rights [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance Rights [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfAcquisitionConsiderationExplanatoryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Acquisition Consideration</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfAcquisitionConsiderationExplanatoryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Acquisition Consideration Explanatory [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfAcquisitionConsiderationExplanatoryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of acquisition consideration explanatory.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassesOfPlacementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of Placement [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassesOfPlacementDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of Placement [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_JanuaryTwentyTwentySixPlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">January 2026 Placement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_JanuaryTwentyTwentySixPlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">January 2026 placement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OctoberTwentyTwentyFivePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">October 2025 Placement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OctoberTwentyTwentyFivePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">October 2025 placement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_MrJMartinsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mr J Martins [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_MrCBussMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mr C Buss [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_MrAShawMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mr A Shaw [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfFinancialSupport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of financial support</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfFinancialSupport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount of Financial Support</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfFinancialSupport_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of financial support</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_KeyManagementPersonnelMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Key Management Personnel [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_MrWilkinsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mr Wilkins [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_MrMLaybournMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mr M Laybourn [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExercisePriceOfOutstandingShareOptions2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exercise price of outstanding share options</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExercisePriceOfOutstandingShareOptions2019_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOutstandingShareOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOutstandingShareOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Closing options outstanding and exercisable &#8212; number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOutstandingShareOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Opening options &#8212; number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOutstandingShareOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of share options outstanding in share-based payment arrangement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average remaining contractual life of outstanding share options</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of terms and conditions of share-based payment arrangement [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-Based Payments [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Schedule of Performance Rights [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of terms and conditions of share-based payment arrangement [line items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ranges of exercise prices for outstanding share options [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ranges of exercise prices for outstanding share options [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OptionsExercisableOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options exercisable one [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OptionsExercisableOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Options Exercisable One [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OptionsExercisableTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options exercisable two [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OptionsExercisableTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Options Exercisable Two [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OptionsExercisableThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options exercisable three [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OptionsExercisableThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Options Exercisable Three [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TypesOfAntidilutiveInstrumentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Types of antidilutive instruments [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TypesOfAntidilutiveInstrumentsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Types of antidilutive instruments [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ShareOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share options [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ShareOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share options [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExercisePriceShareOptionsGranted2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exercise price, share options granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expected volatility, share options granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Risk free interest rate, share options granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfKeyManagementPersonnelCompensationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Key Management Personnel Compensation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfKeyManagementPersonnelCompensationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Key Management Personnel Compensation [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfKeyManagementPersonnelCompensationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of key management personnel compensation.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_KeyManagementPersonnelCompensationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Key Management Personnel Compensation [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term employee benefits</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Key management personnel compensation, short-term employee benefits</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Board of Directors Oversight [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible [Flag]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Expertise of Management Responsible [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management, Strategy, and Governance [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management, Strategy, and Governance [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes Integrated [Flag]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes Integrated [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementThirdPartyEngagedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Third Party Engaged [Flag]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AddressTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Address Type [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Outstanding at July 1</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Outstanding at June 30</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance rights, Numbers</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of other equity instruments outstanding in share-based payment arrangement at beginning of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Forfeited &#8212; Class E</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of other equity instruments forfeited in share-based payment arrangement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of other equity instruments granted in share-based payment arrangement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Converted to ordinary shares &#8212; Class A</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of other equity instruments exercised or vested in share-based payment arrangement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Types of share-based payment arrangements [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Types of share-based payment arrangements [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payments [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfAcquisitionConsiderationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Acquisition Consideration [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfVestingRequirementsForSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance rights, Vesting condition and expiry</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfVestingRequirementsForSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of vesting requirements for share-based payment arrangement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DateOfGrantOfSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance rights, Grant date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DateOfGrantOfSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Date of grant of share-based payment arrangement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfInstrumentsGrantedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance rights, fair value per right</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfInstrumentsGrantedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of instruments granted in share-based payment arrangement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForSharebasedPayments_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Performance rights, Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForSharebasedPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payments expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForSharebasedPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for share-based payments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of financial instruments [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_InitialPublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Initial Public Offering [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassAPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class A [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassAPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class A Performance Rights [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_MonteCarloMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Monte Carlo [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AdvancePaymentForUnderwritersExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Advance payment for underwriter&#8217;s expenses.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseThroughConversionOfConvertibleInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payments reserve</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of financial assets [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfFinancialAssetsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of financial assets [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfFinancialAssetsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of financial assets [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FinancialAssetsAtAmortisedCostMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial assets at amortised cost [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FinancialAssetsAtAmortisedCostMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial assets at amortised cost, class [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of financial liabilities [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of financial liabilities [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FinancialLiabilitiesAtAmortisedCostMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial liabilities at amortised cost [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FinancialLiabilitiesAtAmortisedCostMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial liabilities at amortised cost, class [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CurrencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Currency [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="currency_AllCurrenciesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">All Currencies [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="currency_AUD_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">AUD [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="currency_AUD_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Australian Dollar [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="currency_AUD_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Australia, Dollars</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TaxRateEffectOfForeignTaxRates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax benefit rate</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TradeAndOtherReceivableAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trade and Other Receivables [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trade and other receivables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of trade and other receivables [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="currency_MWK_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">MWK [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="currency_MWK_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Malawian [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="currency_MWK_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Malawi, Kwachas</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfTradeAndOtherReceivablesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Trade and Other Receivables [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfTradeAndOtherReceivablesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of detailed information about trade and other receivables.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsByTypeOfInterestRateLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Financial Instruments Category and Currency [Line Items]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_U.S.DollarsAndEurosDollarsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">USD/EUR [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash and cash equivalents at the end of the financial year</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfTradeAndOtherReceivablesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Trade and Other Receivables [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherNoncurrentFinancialAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other financial assets &#8212; restricted term deposit</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherNoncurrentFinancialAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other non-current financial assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_GoodsAndServicesTaxAndValueAddedTaxRefundsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goods and services tax and value added tax refunds receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_GoodsAndServicesTaxAndValueAddedTaxRefundsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of current goods and services tax and value added tax refunds receivable.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherCurrentReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other receivables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherCurrentReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other current receivables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trade and other receivables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total trade and other current receivables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other receivables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other receivables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FinancialAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total financial assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FinancialAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total financial assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, plant and equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of detailed information about property, plant and equipment [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Categories of financial liabilities [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trade and other payables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total trade and other payables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FinancialLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total financial liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FinancialLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfPropertyPlantAndEquipmentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Property Plant and Equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfPropertyPlantAndEquipmentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule disclosing the reconciliation of changes in property, plant and equipment.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Share-based payments expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payments expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Share-based payments expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expense from share-based payment transactions</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseByNature_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseByNature_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total expenses, by nature</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfLossBeforeIncomeTaxAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Loss Before Income Tax [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AnalysisOfIncomeAndExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expenses [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfLossBeforeIncomeTaxTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Loss Before Income Tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfLossBeforeIncomeTaxTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Loss Before Income Tax [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfLossBeforeIncomeTaxTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of detailed information about loss before income tax.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_MajorComponentsOfTaxExpenseIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfIncomeTaxExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfIncomeTaxExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of income tax [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentTaxExpenseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentTaxExpenseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current tax expense (income)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DeferredTaxExpenseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DeferredTaxExpenseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred tax expense (income)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income tax expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Income tax expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total tax expense (income)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfIncomeTaxExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Income Tax Expense [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfIncomeTaxExpenseTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Income Tax Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfIncomeTaxExpenseTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Income Tax Expense [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfIncomeTaxExpenseTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of detailed information about income tax expense.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfNumericalReconciliationOfIncomeTaxExpenseTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Numerical Reconciliation of Income Tax Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfNumericalReconciliationOfIncomeTaxExpenseTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Numerical Reconciliation of Income Tax Expense [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfNumericalReconciliationOfIncomeTaxExpenseTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of detailed information about reconciliation of income tax expense.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Unrecognised Deferred Tax Assets and Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of temporary difference, unused tax losses and unused tax credits [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Risk Management [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial risk management</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of financial instruments [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromIssuingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">IPO received</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromIssuingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from issuing shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ProceedsFromIssuanceOfInitialPublicOfferings_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross proceeds</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ProceedsFromIssuanceOfInitialPublicOfferings_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Initial Public Offerings</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ProceedsFromIssuanceOfInitialPublicOfferings_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of gross proceeds of IPO.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ProceedsFromIssuanceOfOver-AllotmentOption_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Over-allotment option</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ProceedsFromIssuanceOfOver-AllotmentOption_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Over-Allotment Option</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ProceedsFromIssuanceOfOver-AllotmentOption_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of over-allotment option.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PurchaseOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PurchaseOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase of Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PurchaseOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares purchased.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AdditionalCarry-ForwardTaxLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional carry-forward tax losses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AdditionalCarry-ForwardTaxLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of benefit arising from a additional carryforward tax losses.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExplanationOfMeasurementBasesForFinancialInstrumentsUsedInPreparingFinancialStatementsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Financial Instruments Category and Currency</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExplanationOfMeasurementBasesForFinancialInstrumentsUsedInPreparingFinancialStatementsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Explanation of measurement bases for financial instruments used in preparing financial statements [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Numerical Reconciliation of Income Tax Expense [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss before income tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Loss before income tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Loss before income tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Profit (loss) before tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TaxEffectOfAmountsWhichAreNotDeductibleInCalculatingTaxableIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax effect of amounts which are not deductible in calculating taxable income:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TaxEffectOfAmountsWhichAreNotDeductibleInCalculatingTaxableIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax effect of amounts which are not deductible in calculating taxable income: [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TaxEffectOfShareBasedPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TaxEffectOfShareBasedPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax Effect of Share Based Payments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TaxEffectOfShareBasedPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the share-based payments.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other non-deductible items</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax effect of expense not deductible in determining taxable profit (tax loss)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TaxEffectOfMovementInUnrecognisedTemporaryDifferences_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Movement in unrecognised temporary differences</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TaxEffectOfMovementInUnrecognisedTemporaryDifferences_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the movement in unrecognised temporary differences.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax losses for which no deferred tax asset has been recognised</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other tax effects for reconciliation between accounting profit and tax expense (income)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ApplicableTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax benefit rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ApplicableTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Applicable tax rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentRegistrationStatement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Registration Statement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentAnnualReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Annual Report</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Transition Report</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFinStmtErrorCorrectionFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Financial Statement Error Correction [Flag]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentShellCompanyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Shell Company Report</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Interactive Data Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentAccountingStandard_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Accounting Standard</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Year Focus</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Common Stock, Shares Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(b) Security</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_BasicEarningsLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic loss per share (cents)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_BasicEarningsLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total basic earnings (loss) per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DilutedEarningsLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Diluted loss per share (cents)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DilutedEarningsLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total diluted earnings (loss) per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_StatementOfChangesInEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of changes in equity [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_StatementOfChangesInEquityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of changes in equity [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComponentsOfEquityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Components of equity [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComponentsOfEquityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Components of equity [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ReserveOfSharebasedPaymentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payments reserve</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ReserveOfSharebasedPaymentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reserve of share-based payments [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated losses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained earnings [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ContributedEquityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contributed equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ContributedEquityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contributed Equity [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_StatementOfChangesInEquityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of changes in equity [line items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Equity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Equity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Equity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL EQUITY</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Equity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Equity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity at beginning of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss for the year</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Loss attributable to ordinary shareholders of the Company (A$)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Loss for the year</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Profit (loss)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComprehensiveIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total comprehensive loss for the year</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComprehensiveIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total comprehensive loss for the year</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComprehensiveIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total comprehensive income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TransactionsWithOwnersInTheirCapacityAsOwnersAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transactions with owners in their capacity as owners:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TransactionsWithOwnersInTheirCapacityAsOwnersAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transactions With Owners In Their Capacity As Owners: [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ApplicationMoniesReceivedInAPriorYearAppliedOnIssueOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Application monies received in a prior year applied on issue of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ApplicationMoniesReceivedInAPriorYearAppliedOnIssueOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Application Monies Received In A Prior Year Applied On Issue Of Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ApplicationMoniesReceivedInAPriorYearAppliedOnIssueOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Application monies received in a prior year applied on issue of shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesIssuedOnConversionOfOptionsAndPerformanceRightsTransferFromReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued on conversion of options and performance rights &#8212; transfer from reserve</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesIssuedOnConversionOfOptionsAndPerformanceRightsTransferFromReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued On Conversion Of Options And Performance Rights Transfer From Reserve</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesIssuedOnConversionOfOptionsAndPerformanceRightsTransferFromReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares Issued On Conversion Of Options And Performance Rights &#8212; Transfer From Reserve.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OptionsIssuedForEquityTransactionServices_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options issued for equity transaction services</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OptionsIssuedForEquityTransactionServices_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Options Issued For Equity Transaction Services</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OptionsIssuedForEquityTransactionServices_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Options issued for equity transaction services.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesIssuedAsAcquisitionConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued as acquisition consideration</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesIssuedAsAcquisitionConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued As Acquisition Consideration</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesIssuedAsAcquisitionConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares issued as acquisition consideration.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PerformanceRightsIssuedAsAcquisitionConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance rights issued as acquisition consideration</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PerformanceRightsIssuedAsAcquisitionConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance Rights Issued As Acquisition Consideration</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PerformanceRightsIssuedAsAcquisitionConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance rights issued as acquisition consideration.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ExchangeDifferencesOnTranslationOfForeignOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exchange differences on translation of foreign operations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ExchangeDifferencesOnTranslationOfForeignOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exchange Differences On Translation Of Foreign Operations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ExchangeDifferencesOnTranslationOfForeignOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exchange Differences On Translation Of Foreign Operations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_GeneralInformationAndMaterialAccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General Information and Material Accounting Policies [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General information and material accounting policies</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of material accounting policy information [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Policies [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of temporary difference, unused tax losses and unused tax credits [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfEffectOnForeignExchangeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Effect on Foreign Exchange</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfEffectOnForeignExchangeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Effect on Foreign Exchange [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfEffectOnForeignExchangeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure effect on foreign exchange.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_MaturityAnalysisForDerivativeFinancialLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Contractual Undiscounted Cash Flows of Financial Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_MaturityAnalysisForDerivativeFinancialLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of maturity analysis for derivative financial liabilities [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DeferredTaxAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax assets (30%)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DeferredTaxAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DeferredTaxLiabilities30Abstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred tax liabilities (30%)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment indicators</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment loss recognised in profit or loss, property, plant and equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of maturity analysis for derivative financial liabilities [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of maturity analysis for derivative financial liabilities [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_MaturityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maturity [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_MaturityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maturity [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NotLaterThanOneYearMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Less than 1 year [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NotLaterThanOneYearMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Within one year [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NotLaterThanOneYearMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Not later than one year [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">1 to 5 years [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Later than one year but not later than five years [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Later than one year and not later than five years [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LaterThanFiveYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">More than 5 years [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LaterThanFiveYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Later than five years [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LaterThanFiveYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Later than five years [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PropertyPlantAndEquipmentPledgedAsSecurity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pledged as security</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PropertyPlantAndEquipmentPledgedAsSecurity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, plant and equipment, pledged as security</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additions</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additions other than through business combinations, property, plant and equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Contractual Undiscounted Cash Flows of Financial Liabilities [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of maturity analysis for derivative financial liabilities [line items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ForeignExchangeGainLossAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign exchange gain (loss) [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NetForeignExchangeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect on loss</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NetForeignExchangeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net foreign exchange losses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NetForeignExchangeLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net foreign exchange loss</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NetForeignExchangeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net foreign exchange loss</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PaymentsToSuppliersForGoodsAndServices_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments to suppliers and employees</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PaymentsToSuppliersForGoodsAndServices_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to suppliers for goods and services</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InterestReceivedClassifiedAsOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest received</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InterestReceivedClassifiedAsOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest received</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in operating activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net cash used in operating activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net cash flows from (used in) operating activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from investing activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash flows from (used in) investing activities [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments for property, plant and equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase of property, plant and equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PaymentsForExplorationAndEvaluationExpenditure_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments for exploration and evaluation expenditure</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PaymentsForExplorationAndEvaluationExpenditure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for exploration and evaluation expenditure</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PaymentsForExplorationAndEvaluationExpenditure_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of payments for exploration and evaluation expenditure.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PlacementOfRestrictedTermDeposit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Placement of restricted term deposit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PlacementOfRestrictedTermDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Placement of restricted term deposit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PlacementOfRestrictedTermDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of placement of restricted term deposit.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in investing activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net cash flows from (used in) investing activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from financing activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash flows from (used in) financing activities [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromIssueOfOrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issues of ordinary shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromIssueOfOrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Ordinary shares value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromIssueOfOrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/disclosureGuidance">Before costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromIssueOfOrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from issue of ordinary shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from borrowings</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from borrowings</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Repayment of borrowings</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest-free loan amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of borrowings</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PaymentsForShareIssueCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments for share issue transaction costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PaymentsForShareIssueCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for share issue costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ProceedsReceivedInAdvanceOfTheIssueOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds received in advance of the issue of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ProceedsReceivedInAdvanceOfTheIssueOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds received in advance of the issue of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ProceedsReceivedInAdvanceOfTheIssueOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of proceeds received in advance of the issue of shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PaymentsForDeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments for deferred offering costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PaymentsForDeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for deferred offering costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PaymentsForDeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of payments for deferred offering costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash from financing activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net cash flows from (used in) financing activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net increase/(decrease) in cash and cash equivalents before the effect of exchange rate changes</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net increase (decrease) in cash and cash equivalents before effect of exchange rate changes</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effect of exchange rate changes on cash and cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Name</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorFirmId_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Firm ID</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorLocation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Location</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorOpinionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Opinion [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Profit or loss [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RevenueFromInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RevenueFromInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TaxRateEffectOfRevenuesExemptFromTaxation_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Corporate income tax rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TaxRateEffectOfRevenuesExemptFromTaxation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax rate effect of revenues exempt from taxation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Corporate income tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unused tax losses for which no deferred tax asset recognised</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_Carry-forwardAustralianRevenueTaxLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Carry-forward Australian revenue tax losses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_Carry-forwardAustralianRevenueTaxLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Carry-forward Australian revenue tax losses.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SectionCapitalAllowanceBlackholeExpenditure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Section capital allowance (blackhole) expenditure</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SectionCapitalAllowanceBlackholeExpenditure_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Section capital allowance (blackhole) expenditure.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DeductibleTemporaryDifferences_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deductible temporary differences</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DeductibleTemporaryDifferences_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deductible temporary differences.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ForeignCurrencyTranslationReserveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign currency translation reserve</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ForeignCurrencyTranslationReserveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign currency translation reserve [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesIssuedForCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued for cash</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesIssuedForCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued for Cash</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharesIssuedForCash_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares issued for cash.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ShareIssueTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share issue transaction costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ShareIssueTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Issue Transaction Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ShareIssueTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share issue transaction costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DescriptionOfAccountingPolicyBasisOfPreparationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of preparation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DescriptionOfAccountingPolicyBasisOfPreparationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of Accounting Policy Basis of Preparation [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DescriptionOfAccountingPolicyBasisOfPreparationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The description of the entity's accounting policy for basis of preparation.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DescriptionOfAccountingPolicyBasisOfConsolidationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of consolidation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DescriptionOfAccountingPolicyBasisOfConsolidationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of Accounting Policy Basis of Consolidation [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DescriptionOfAccountingPolicyBasisOfConsolidationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The description of the entity's accounting policy for basis of consolidation.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DescriptionOfAccountingPolicyGoingConcernPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Going concern</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DescriptionOfAccountingPolicyGoingConcernPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of Accounting Policy Going Concern [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DescriptionOfAccountingPolicyGoingConcernPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The description of the entity's accounting policy for going concern.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ComplianceAndRegulatoryCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Compliance and regulatory costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ComplianceAndRegulatoryCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Compliance and Regulatory Cost</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ComplianceAndRegulatoryCost_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of compliance and regulatory cost.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_MalawianCarry-ForwardTaxLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Malawian carry-forward tax losses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_MalawianCarry-ForwardTaxLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Malawian Carry-Forward Tax Losses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_MalawianCarry-ForwardTaxLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of malawian carry-forward tax losses.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of temporary difference, unused tax losses and unused tax credits [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary difference, unused tax losses and unused tax credits [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary difference, unused tax losses and unused tax credits [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TemporaryDifferenceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deductible temporary differences [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TemporaryDifferenceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary differences [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_UnrealisedForeignExchangeGainsLossesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealised foreign exchange gains (losses) [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_UnrealisedForeignExchangeGainsLossesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrealised foreign exchange gains (losses) [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_CarryForwardAustralianRevenueTaxLossesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Carry forward Australian revenue tax losses [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_CarryForwardAustralianRevenueTaxLossesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Carry forward Australian revenue tax losses [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_Section40-880CapitalAllowanceBlackholeExpenditureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Section 40-880 capital allowance (blackhole) expenditure [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_Section40-880CapitalAllowanceBlackholeExpenditureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Section 40-880 capital allowance (blackhole) expenditure [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="currency_ZMW_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Kwacha [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="currency_ZMW_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Zambia, Kwacha</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForAmortisationExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Correction of the amortisation period applied in prior years</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForAmortisationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for amortisation expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfTradeAndOtherPayablesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Trade and Other Payables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfTradeAndOtherPayablesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Trade and Other Payables [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfTradeAndOtherPayablesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of trade and other payables.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherPayablesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trade and Other Payables [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TradeAndOtherPayablesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trade and Other Payables [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TradeAndOtherPayablesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trade and Other Payables [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TradeAndOtherPayablesSettlementTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlement terms</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TradeAndOtherPayablesSettlementTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trade and other payables settlement term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_TradeAndOtherPayablesSettlementTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trade and other payables settlement term.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfLeasesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfLeasesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of leases [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfTradeAndOtherPayablesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Trade and Other Payables [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trade payables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current trade payables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Trade and other payables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trade and other current payables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExplanationOfSignificantChangesInNetInvestmentInFinanceLeaseExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Lease liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExplanationOfSignificantChangesInNetInvestmentInFinanceLeaseExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Explanation of significant changes in net investment in finance lease [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current accrued expenses and other current liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CarryingAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Carrying amount [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashEquivalentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents and Cash Flow Information [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ChangesInPropertyPlantAndEquipmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Property, Plant and Equipment [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DepreciationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Depreciation charge</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DepreciationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation, property, plant and equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exchange differences on translation of foreign operations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (decrease) through net exchange differences, property, plant and equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of detailed information about property, plant and equipment [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of property, plant and equipment [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComputerEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Computer equipment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComputerEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Computer equipment [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Property, Plant and Equipment [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of detailed information about property, plant and equipment [line items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAssetsAndLiabilitiesAffectedByCurrencyNotBeingExchangeableTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of assets and liabilities affected by currency not being exchangeable [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAssetsAndLiabilitiesAffectedByCurrencyNotBeingExchangeableLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Effect on Foreign Exchange [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAssetsAndLiabilitiesAffectedByCurrencyNotBeingExchangeableLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of assets and liabilities affected by currency not being exchangeable [line items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net foreign currency liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL LIABILITIES</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GrossCarryingAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GrossCarryingAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gross carrying amount [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentPrepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Non-current prepayments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentPrepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepayments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentPrepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-current prepayments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Prepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total prepayments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Prepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepayments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashAndCashEquivalentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Cash and Cash Equivalents [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash at bank and on hand</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfPrepaymentsAndDeferredOfferingCostsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Prepayments and Deferred Offering Costs [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CategoriesOfFinancialAssetsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Categories of financial assets [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CategoriesOfFinancialAssetsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Categories of financial assets [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfPrepaymentsAndDeferredOfferingCostsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Prepayments and Deferred Offering Costs [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ForeignExchangeSensitivityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign-exchange sensitivity [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ForeignExchangeSensitivityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Exchange Sensitivity [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ChangesInRightofuseAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Movement in the lease liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ChangesInRightofuseAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Changes in right-of-use assets [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Lease liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current lease liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InterestExpenseOnLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest accretion</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InterestExpenseOnLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest expense on lease liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfCommitmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Commitments [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CapitalCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital commitments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CapitalCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total capital commitments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ConsiderationPaidReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consideration received on the exercise of options</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ConsiderationPaidReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consideration paid (received)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_QuotedOrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Quoted ordinary shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_QuotedOrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Quoted Ordinary Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_QuotedOrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Quoted ordinary shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OrdinarySharesSubjectToVoluntaryEscrow_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ordinary shares subject to voluntary escrow</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OrdinarySharesSubjectToVoluntaryEscrow_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Ordinary shares subject to voluntary escrow</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OrdinarySharesSubjectToVoluntaryEscrow_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ordinary Shares Subject to Voluntary Escrow</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OrdinarySharesSubjectToVoluntaryEscrow_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ordinary shares subject to voluntary escrow.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of share-based payment arrangements [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ContingentLiabilitiesAndContingentAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Liabilities and Contingent Assets [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent liabilities and contingent assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of other provisions, contingent liabilities and contingent assets [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Options</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of number and weighted average exercise prices of share options [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfScheduleOfPerformanceRightsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Performance Rights</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfScheduleOfPerformanceRightsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Schedule of Performance Rights Explanatory</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfScheduleOfPerformanceRightsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of performance rights.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent liabilities or contingent assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial assets pledged as collateral for liabilities or contingent liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Opening weighted average exercise price &#8212; A$</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Closing weighted average exercise price &#8212; A$</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average exercise price of share options outstanding in share-based payment arrangement at beginning of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Options exercised &#8212; number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Exercised options</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of share options exercised in share-based payment arrangement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercised options weighted average exercise price &#8212; A$</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average exercise price of share options exercised in share-based payment arrangement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Closing options exercisable &#8212; number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of share options exercisable in share-based payment arrangement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RelatedPartyTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfRelatedPartyExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related party transactions</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfRelatedPartyExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of related party [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of transactions between related parties [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Categories of related parties [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CategoriesOfRelatedPartiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Categories of related parties [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transactions [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of transactions between related parties [line items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AmountsPayableRelatedPartyTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amounts payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AmountsPayableRelatedPartyTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amounts payable, related party transactions</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_CFOCentreWAPtyLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CFO Centre (WA) Pty Ltd [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OutstandingCommitmentsMadeByEntityRelatedPartyTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OutstandingCommitmentsMadeByEntityRelatedPartyTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Outstanding commitments made by entity, related party transactions</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DWCorporatePtyLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">DWCorporate Pty Ltd [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ServicesExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount for services</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ServicesExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Services expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_IssuedCapitalPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Held percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_IssuedCapitalPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issued Capital Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_IssuedCapitalPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of issued capital.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_LusoGlobalMiningB.V.Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Luso Global Mining B.V. [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfReservesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Reserves [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ReserveOfSharebasedPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payments reserve</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ReserveOfSharebasedPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reserve of share-based payments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ReserveOfExchangeDifferencesOnTranslation_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Foreign currency translation reserve</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ReserveOfExchangeDifferencesOnTranslation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect on equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ReserveOfExchangeDifferencesOnTranslation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reserve of exchange differences on translation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total reserves</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reserves</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other reserves</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensationPostemploymentBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Post-employment benefits</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensationPostemploymentBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Key management personnel compensation, post-employment benefits</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Key management personnel compensation, share-based payment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Key management personnel compensation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Option life, share options granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpectedDividendShareOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expected dividend, share options granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_InterestsInSubsidiariesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interests in Subsidiaries [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfInterestsInSubsidiariesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interests in subsidiaries</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfInterestsInSubsidiariesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of interests in subsidiaries [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharePriceOfFairValuesRecognisedAsCapital-RaisingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share price of fair values recognised as capital-raising costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharePriceOfFairValuesRecognisedAsCapital-RaisingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Price Of Fair Values Recognised As Capital-Raising Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SharePriceOfFairValuesRecognisedAsCapital-RaisingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share price of fair values recognised as capital-raising costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSignificantJudgementsAndAssumptionsMadeInRelationToInterestsInOtherEntitiesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Interests in Subsidiaries</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSignificantJudgementsAndAssumptionsMadeInRelationToInterestsInOtherEntitiesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of significant judgements and assumptions made in relation to interests in other entities [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average share price, share options granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of subsidiaries [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of subsidiaries [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiaries [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiaries [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Interests in Subsidiaries [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of subsidiaries [line items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PrincipalPlaceOfBusinessOfSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal place of business</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PrincipalPlaceOfBusinessOfSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Principal place of business of subsidiary</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProportionOfOwnershipInterestInAssociate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProportionOfOwnershipInterestInAssociate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proportion of ownership interest in associate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherEmployeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherEmployeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other employee expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_VestingRecognizedInExpensesPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_VestingRecognizedInExpensesPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vesting Recognized in Expenses Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_VestingRecognizedInExpensesPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the percentage of vesting condition recognized in expenses.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelOfEntityOrParentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Key management personnel of entity or parent [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelOfEntityOrParentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Key management personnel of entity or parent [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Key management personnel compensation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of information about key management personnel [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfEarningsPerShareExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfEarningsPerShareExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of earnings per share [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EarningsPerShareExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Loss Per Share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EarningsPerShareExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings per share [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OtherParticipantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Participants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmericanDepositarySharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">American Depositary Shares [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PurchaseOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase of warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PurchaseOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase of Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PurchaseOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of warrants purchased.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnderwriterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwriter [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ConsolidatedStructuredEntitiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated structured entities [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ConsolidatedStructuredEntitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated structured entities [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_MaximPartnersLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maxim Partners LLC [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Borrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premium</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Borrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Borrowings</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss per share [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_GrossProceedsAfterUnderwritingDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross proceeds after underwriting discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_GrossProceedsAfterUnderwritingDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gross Proceeds After Underwriting Discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_GrossProceedsAfterUnderwritingDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of gross proceeds after deduction of underwriting discounts.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GrossLoanCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gross loan commitments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassBPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class B [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassBPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class B Performance Rights [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassCPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class C [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassCPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class C Performance Rights [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassDPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class D [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ClassDPerformanceRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class D Performance Rights [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseFromEquitysettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payments expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseFromEquitysettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expense from equity-settled share-based payment transactions</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ChilwaMineralsAfricaLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Chilwa Minerals Africa Limited [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_Mota-EngilInvestmentsMalawiLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mota-Engil Investments (Malawi) Limited [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PhalombeMineralsLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Phalombe Minerals Limited [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Events After the Reporting Period [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Events after the reporting period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of events after reporting period [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of non-adjusting events after reporting period [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-adjusting events after reporting period [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-adjusting events after reporting period [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Events After the Reporting Period [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of non-adjusting events after reporting period [line items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average number of ordinary shares, basic</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average number of ordinary shares used in calculating basic earnings per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustedWeightedAverageShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average number of ordinary shares, diluted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustedWeightedAverageShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average number of ordinary shares used in calculating diluted earnings per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ordinary shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ordinary Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of ordinary shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_SubsequentEventsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ForecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forecast [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares grant</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of share options granted in share-based payment arrangement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PercentageOfSharesIssue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of shares issue</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PercentageOfSharesIssue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Shares Issue</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PercentageOfSharesIssue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of shares issue.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_RecognisedCumulativeExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recognised cumulative expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_RecognisedCumulativeExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Recognised Cumulative Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_RecognisedCumulativeExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of recognised cumulative expenses.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_FairValueOfClosingPriceRights_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Of Closing Price Rights</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_FairValueOfClosingPriceRights_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The share price of fair value of closing price rights.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnderwritingDiscountValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriting discount value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnderwritingDiscountValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwriting Discount Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnderwritingDiscountValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of underwriting discount value.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of financial instruments [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AccumulatedDepreciationAndAmortisationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated depreciation [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AccumulatedDepreciationAndAmortisationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated depreciation and amortisation [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_LaboratoryIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Laboratory income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_LaboratoryIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Laboratory income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_LaboratoryIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of laboratory income.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of financial position [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign currency translation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for foreign currency translation [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue and other income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for recognition of revenue [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, plant and equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for property, plant and equipment [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForExplorationAndEvaluationExpenditures_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exploration and evaluation expenditure</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForExplorationAndEvaluationExpenditures_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for exploration and evaluation expenditures [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for leases [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefits</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for employee benefits [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for share-based payment transactions [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial instruments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for financial instruments [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for income tax [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAccountingJudgementsAndEstimatesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Critical accounting judgements, estimates and assumptions</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAccountingJudgementsAndEstimatesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of accounting judgements and estimates [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForTaxesOtherThanIncomeTaxExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goods and services tax (GST) and value added tax (VAT)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForTaxesOtherThanIncomeTaxExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for taxes other than income tax [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DescriptionOfAccountingPolicyForContributedEquityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contributed equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DescriptionOfAccountingPolicyForContributedEquityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of Accounting Policy For Contributed Equity [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DescriptionOfAccountingPolicyForContributedEquityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The description of the entity's material accounting policy information for the contributed equity.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentAssetsLiabilities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Current liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentAssetsLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current assets (liabilities)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_CashFlowsFromUsedInOperatingAndInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Cash flows from used in operating and investing activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_CashFlowsFromUsedInOperatingAndInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Flows From used in Operating and Investing Activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_CashFlowsFromUsedInOperatingAndInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of operating and investing activities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfOperatingSegmentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Information [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment information</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of entity's operating segments [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfGeographicalAreasTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of geographical areas [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfGeographicalAreasLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Non-Current Assets [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfGeographicalAreasLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of geographical areas [line items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total non-current assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total non-current assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total non-current assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfNon-CurrentAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Non-Current Assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfNon-CurrentAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Non-Current Assets [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfNon-CurrentAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of detailed information about non-current assets.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Revenue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue from external customers</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Revenue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_NumberOfOperatingSegment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating segment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_NumberOfOperatingSegment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Operating Segments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_NumberOfOperatingSegment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of operating segments.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_InterestsAndOtherIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest and Other Income [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest and other income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of interests in other entities [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_InterestsAndOtherIncomeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Interest and Other Income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_InterestsAndOtherIncomeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest and Other Income [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_InterestsAndOtherIncomeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of detailed information about other income expense.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_InterestsAndOtherIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_InterestsAndOtherIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interests and Other Income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_InterestsAndOtherIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of interest and other income.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfInterestAndOtherIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Interest and Other Income [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of attribution of expenses by nature to their function [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Administration expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Administration expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Administrative expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ComplianceAndRegulatoryCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Compliance and regulatory costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ComplianceAndRegulatoryCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Compliance and regulatory costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ComplianceAndRegulatoryCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Compliance and Regulatory Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ComplianceAndRegulatoryCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of compliance and regulatory costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ConsultingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Consulting expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ConsultingExpenses_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Consulting expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ConsultingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consulting Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ConsultingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of consulting expenses.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DepreciationAndAmortisationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Depreciation and amortisation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DepreciationAndAmortisationExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Depreciation and amortisation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DepreciationAndAmortisationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation and amortisation expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EmployeeBenefitsExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Employee benefits expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EmployeeBenefitsExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Employee benefits expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EmployeeBenefitsExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee benefits expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherOperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Other expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherOperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherOperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other operating income (expense)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ExplorationExpenditureExpensed_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Exploration expenditure expensed</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ExplorationExpenditureExpensed_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Exploration expenditure expensed</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ExplorationExpenditureExpensed_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration Expenditure Expensed</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ExplorationExpenditureExpensed_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exploration expenditure expensed.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_ContactPersonnelName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contact Personnel Name</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_ContactPersonnelEmailAddress_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contact Personnel Email Address</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_IcfrAuditorAttestationFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ICFR Auditor Attestation Flag</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityWellKnownSeasonedIssuer_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Well-known Seasoned Issuer</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityVoluntaryFilers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Voluntary Filers</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Filer Category</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Shell Company</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Ex Transition Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressesAddressTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Addresses, Address Type [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_BusinessContactMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Contact</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_BusinessContactMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Contact [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line Two</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current assets [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total current assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-current assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-current assets [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, plant and equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Net carrying amount at end of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Net carrying amount at beginning of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RightofuseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Right-of-use assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RightofuseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Opening net carrying amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RightofuseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Closing net carrying amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RightofuseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net carrying amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentPrepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepayments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentPrepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current prepayments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentPrepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total current prepayments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AssetsArisingFromExplorationForAndEvaluationOfMineralResources_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exploration and evaluation assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AssetsArisingFromExplorationForAndEvaluationOfMineralResources_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at the beginning of the year</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AssetsArisingFromExplorationForAndEvaluationOfMineralResources_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at the end of the year</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AssetsArisingFromExplorationForAndEvaluationOfMineralResources_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets arising from exploration for and evaluation of mineral resources</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL ASSETS</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EquityAndLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity and liabilities [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherComprehensiveIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other comprehensive income/(loss)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherComprehensiveIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other comprehensive income [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exchange differences on translation of foreign operations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other comprehensive income, net of tax, exchange differences on translation of foreign operations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other comprehensive income/(loss) for the year, net of tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total other comprehensive income that will be reclassified to profit or loss, net of tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Tax [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of temporary difference, unused tax losses and unused tax credits [line items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_AU_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Australia [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_AU_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AUSTRALIA</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_MW_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Malawi [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_MW_lbl" xlink:role="http://www.xbrl.org/2003/role/label">MALAWI</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCountry_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Country</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Items that may be reclassified subsequently to profit or loss</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_GeneralInformationAndMaterialAccountingPoliciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General Information And Material Accounting Policies [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_GeneralInformationAndMaterialAccountingPoliciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General Information And Material Accounting Policies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnderwritingDiscountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwriting Discount [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AnalysisOfIncomeAndExpenseTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Analysis Of Income And Expense [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AnalysisOfIncomeAndExpenseLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AnalysisOfIncomeAndExpenseLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Analysis Of Income And Expense [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PlantAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plant and equipment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PlantAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plant And Equipment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_CashAcquiredOnAcquisitionOfSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash acquired on acquisition of subsidiaries</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_CashAcquiredOnAcquisitionOfSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Acquired on Acquisition of Subsidiaries</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_CashAcquiredOnAcquisitionOfSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represent the amount of cash acquired on acquisition of subsidiaries.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GeographicalAreasAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical areas [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GeographicalAreasDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical areas [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current liabilities [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total current liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-current liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-current liabilities [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total non-current liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total non-current liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NetAssetsLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">NET ASSETS</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NetAssetsLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets (liabilities)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IssuedCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contributed equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IssuedCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issued capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RetainedEarnings_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated losses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RetainedEarnings_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained earnings</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of cash flows [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from operating activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Reconciliation Net Cash Used in Operating Activities [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnrecognisedDeferredTaxAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnrecognisedDeferredTaxAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognised Deferred Tax Assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnrecognisedDeferredTaxAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of unrecognised deferred tax assets.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnrecognisedDeferredTaxLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealised foreign exchange gains</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnrecognisedDeferredTaxLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognised Deferred Tax Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnrecognisedDeferredTaxLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of unrecognised deferred tax liabilities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnrecognisedDeferredTaxLiabilityAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognised deferred tax liability asset</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnrecognisedDeferredTaxLiabilityAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognised Deferred Tax Liability Asset</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_UnrecognisedDeferredTaxLiabilityAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of unrecognised deferred tax liability asset.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_MalawianMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Malawian [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Risk Management [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of detailed information about financial instruments [line items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TypesOfInterestRatesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Types of interest rates [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TypesOfInterestRatesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Types of interest rates [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FloatingInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Interest Rates [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FloatingInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Floating interest rate [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DepreciationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation percent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DepreciationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DepreciationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of depreciation.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AppreciationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Appreciation percent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AppreciationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Appreciation Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AppreciationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of appreciation.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_StrengtheningPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Strengthening percent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_StrengtheningPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Strengthening Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_StrengtheningPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of strengthening.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_WeakeningPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weakening percent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_WeakeningPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weakening Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_WeakeningPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of weakening.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseInWorkingCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Working capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseInWorkingCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (decrease) in working capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TypesOfRisksAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Types of risks [axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TypesOfRisksDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Types of risks [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CreditRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Risk [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CreditRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit risk [member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of property, plant and equipment [domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_MaximumExposureToCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum exposure to credit risk</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_MaximumExposureToCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum exposure to credit risk</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_InterestRateTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_InterestRateTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_InterestRateTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate term.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ExplorationAndEvaluationAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration and Evaluation Assets [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfExplorationAndEvaluationAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exploration and evaluation assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfExplorationAndEvaluationAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of exploration and evaluation assets [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PrepaymentsAndDeferredOfferingCostsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepayments and Deferred Offering Costs [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPrepaymentsAndOtherAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepayments and deferred offering costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPrepaymentsAndOtherAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of prepayments and other assets [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfPrepaymentsAndDeferredOfferingCostsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Prepayments and Deferred Offering Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfPrepaymentsAndDeferredOfferingCostsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Prepayments and Deferred Offering Costs [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfPrepaymentsAndDeferredOfferingCostsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of schedule of prepayments and deferred offering costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents and cash flow information</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of cash and cash equivalents [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentPrepaymentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Prepayments and Deferred Offering Costs [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfReconciliationNetCashUsedInOperatingActivitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Reconciliation Net Cash Used in Operating Activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfReconciliationNetCashUsedInOperatingActivitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Reconciliation Net Cash Used in Operating Activities [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfReconciliationNetCashUsedInOperatingActivitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular of reconciliation net cash used in operating activities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_CurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_NonCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trade and other payables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of trade and other payables [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AmortisationExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amortisation charge for the year</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AmortisationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortisation expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of detailed information about financial instruments [table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_OtherPrepaymentsAndDepositsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other prepayments and deposits [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DrillRigPrepaymentMotaEngilCurrentPortionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Drill-rig prepayment (Mota-Engil) &#8212; current portion [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PrepaidEquityRaisingCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid equity raising costs [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DrillRigPrepaymentMotaEngilNonCurrentPortionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Drill-rig prepayment (Mota-Engil) &#8212; non-current portion [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForReconcileProfitLossAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments for non-cash items:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForReconcileProfitLossAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments to reconcile profit (loss) [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortisation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for depreciation and amortisation expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ChangesInOperatingAssetsAndLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in operating assets and liabilities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ChangesInOperatingAssetsAndLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Changes in Operating Assets and Liabilities [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AdjustmentsForDecreaseincreaseInReceivablesAndPrepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Decrease/(increase) in receivables and prepayments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AdjustmentsForDecreaseincreaseInReceivablesAndPrepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for Decrease/(increase) in Receivables and Prepayments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AdjustmentsForDecreaseincreaseInReceivablesAndPrepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of receivables and prepayments.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase/(decrease) in trade and other payables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for increase (decrease) in trade and other payables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in employee benefit obligations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for increase (decrease) in employee benefit liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RestrictedCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Term deposit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RestrictedCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted cash and cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfExplorationAndEvaluationAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Exploration and Evaluation Assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfExplorationAndEvaluationAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of exploration and evaluation assets.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ScheduleOfExplorationAndEvaluationAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Exploration and Evaluation Assets [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ExplorationAndEvaluationExpenditureCapitalised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration and evaluation expenditure capitalised</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ExplorationAndEvaluationExpenditureCapitalised_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of exploration and evaluation expenditure capitalised.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Right-of-Use Assets [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Right-of-Use Assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of quantitative information about right-of-use assets [text block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_LiquidityRiskContractualMaturitiesOfFinancialLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liquidity Risk &#8212; Contractual Maturities of Financial Liabilities [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PrepaidEquityRaisingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid equity raising costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PrepaidEquityRaisingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Equity Raising Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PrepaidEquityRaisingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepaid equity raising costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ReconciliationOfChangesInRightofuseAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Movement [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ReconciliationOfChangesInRightofuseAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reconciliation of changes in right-of-use assets [abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PercentageOfDrillingServicesInvoicesCostsToBeRecovered_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of drilling services invoices costs to be recovered</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PercentageOfDrillingServicesInvoicesCostsToBeRecovered_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Drilling Services Invoices Costs to be Recovered</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_PercentageOfDrillingServicesInvoicesCostsToBeRecovered_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of drilling services invoices cost to be recovered.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfDetailedInformationAboutCashAndCashEquivalentsExplanatoryTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Cash and Cash Equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfDetailedInformationAboutCashAndCashEquivalentsExplanatoryTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of detailed information about cash and cash equivalents explanatory [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfDetailedInformationAboutCashAndCashEquivalentsExplanatoryTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of detailed information about cash and cash equivalents explanatory.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfRight-of-UseAssetsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right-of-use assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfRight-of-UseAssetsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Right-of-Use Assets [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_DisclosureOfRight-of-UseAssetsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of disclosure of right-of-use assets.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount Of Cost</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AmountOfCost_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of cost.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AccumulatedAmortisation_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated amortisation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AccumulatedAmortisation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Amortisation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_AccumulatedAmortisation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of reducing the carrying value of an intangible asset.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ImpairmentExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment indicators</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="chw_ImpairmentExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment Exploration and Evaluation Assets</link:label>
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