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    <element id="CHRN_ScheduleOfCostAllocationsFromParentTableTextBlock" name="ScheduleOfCostAllocationsFromParentTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_ScheduleOfSegmentReportingInformationsBySegmentTextBlock" name="ScheduleOfSegmentReportingInformationsBySegmentTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_WorkingCapitalDeficit" name="WorkingCapitalDeficit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_ContractWithCustomerLiabilityAdvanceBillings" name="ContractWithCustomerLiabilityAdvanceBillings" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_ContractWithCustomerLiabilityOtherAdjustments" name="ContractWithCustomerLiabilityOtherAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_DeferredTaxAssetsLeaseLiability" name="DeferredTaxAssetsLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_DeferredTaxLiabilitiesPropertyPlantAndEquipments" name="DeferredTaxLiabilitiesPropertyPlantAndEquipments" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_DeferredTaxLiabilitiesRightOfUseAssets" name="DeferredTaxLiabilitiesRightOfUseAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseExpenses" name="OperatingLeaseExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_ShortTermLeaseExpenses" name="ShortTermLeaseExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseCosts" name="OperatingLeaseCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_FinanceLeaseCost" name="FinanceLeaseCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueNextTwelveMonths" name="OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueNextTwelveMonths" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueYearTwo" name="OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueYearThree" name="OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueYearFour" name="OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueYearFive" name="OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueAfterYearFive" name="OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueAfterYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseAndFinanceLeaseLiabilityPaymentsDue" name="OperatingLeaseAndFinanceLeaseLiabilityPaymentsDue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseAndFinanceLeaseLiabilityUndiscountedExcessAmount" name="OperatingLeaseAndFinanceLeaseLiabilityUndiscountedExcessAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseAndFinanceLeaseLiability" name="OperatingLeaseAndFinanceLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseAndFinanceLeaseLiabilityCurrent" name="OperatingLeaseAndFinanceLeaseLiabilityCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_OperatingLeaseAndFinanceLeaseLiabilityNoncurrent" name="OperatingLeaseAndFinanceLeaseLiabilityNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_SellingGeneralAndAdministrativeExpenses" name="SellingGeneralAndAdministrativeExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_CashPoolingAndGeneralFinancingActivities" name="CashPoolingAndGeneralFinancingActivities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_CorporateOverheadAndOtherAllocations" name="CorporateOverheadAndOtherAllocations" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_NetTransfersFromParent" name="NetTransfersFromParent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_NetAssetsContributedByParentCompany" name="NetAssetsContributedByParentCompany" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_LeaseAndRelatedCosts" name="LeaseAndRelatedCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_AdjustedCostOfRevenues" name="AdjustedCostOfRevenues" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CHRN_AdjustedSellingGeneralAndAdministrative" name="AdjustedSellingGeneralAndAdministrative" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
</schema>
