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        <link:linkbaseRef xlink:type="simple" xlink:href="fcuv-20260630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Definition Links" />
      </appinfo>
    </annotation>
    <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
    <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
    <import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd" />
    <import namespace="http://fasb.org/us-gaap/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd" />
    <import namespace="http://fasb.org/us-types/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-types-2026.xsd" />
    <import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd" />
    <import namespace="http://xbrl.sec.gov/ecd/2026" schemaLocation="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd" />
    <import namespace="http://xbrl.sec.gov/country/2026" schemaLocation="https://xbrl.sec.gov/country/2026/country-2026.xsd" />
    <import namespace="http://xbrl.sec.gov/currency/2026" schemaLocation="https://xbrl.sec.gov/currency/2026/currency-2026.xsd" />
    <import namespace="http://fasb.org/srt/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd" />
    <import namespace="http://fasb.org/srt-types/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-types-2026.xsd" />
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    <element id="FCUV_RentalRevenueMember" name="RentalRevenueMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_OtherRevenueMember" name="OtherRevenueMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_SharesToBeIssuedCommonSharesMember" name="SharesToBeIssuedCommonSharesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_LusherLLCMember" name="LusherLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_AvantgardeServiceInc.Member" name="AvantgardeServiceInc.Member" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="FCUV_TenantTwoMember" name="TenantTwoMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_CustomerOneMember" name="CustomerOneMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_CustomerTwoMember" name="CustomerTwoMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_CustomerThreeMember" name="CustomerThreeMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_OneVendorsMember" name="OneVendorsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_MarketableSecuritiesStockMember" name="MarketableSecuritiesStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_RentReceivableMember" name="RentReceivableMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_SeriesBPreferredStockPurchaseAgreementMember" name="SeriesBPreferredStockPurchaseAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_SpartanCapitalSecuritiesLLCMember" name="SpartanCapitalSecuritiesLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_RedeemablePreferredStockConversionMember" name="RedeemablePreferredStockConversionMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_SeriesBConvertiblePreferredStockMember" name="SeriesBConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_LusherHoldingLLCMember" name="LusherHoldingLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_FirstPaymentMember" name="FirstPaymentMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_StockPurchaseAgreementMember" name="StockPurchaseAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_EmploymentAgreementsMember" name="EmploymentAgreementsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_AwardAgreementMember" name="AwardAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_EightEmployeesMember" name="EightEmployeesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_SecuritiesPurchaseAgreementMember" name="SecuritiesPurchaseAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_PrefundedWarrantsMember" name="PrefundedWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_EachBoardMemberMember" name="EachBoardMemberMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_OneNewBoardMember" name="OneNewBoardMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_AllBoardMembersMember" name="AllBoardMembersMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_PerfecularAndLusherMember" name="PerfecularAndLusherMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_CorporateAndIoTMember" name="CorporateAndIoTMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_ShenzhenQianhaiCooperationZonePeoplesCourtMember" name="ShenzhenQianhaiCooperationZonePeoplesCourtMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_SharesToBeIssuedCommonSharesValue" name="SharesToBeIssuedCommonSharesValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_SharesToBeIssuedCommonShares" name="SharesToBeIssuedCommonShares" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_PropertyOperatingExpenses" name="PropertyOperatingExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_StockBasedCompensationSharesIssuedForAwardAgreement" name="StockBasedCompensationSharesIssuedForAwardAgreement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_StockBasedCompensationSharesIssuedForEmploymentContract" name="StockBasedCompensationSharesIssuedForEmploymentContract" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_StockBasedCompensationSharesIssuedForEmploymentContractShares" name="StockBasedCompensationSharesIssuedForEmploymentContractShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_StockIssuedDuringPeriodValueStockSplits" name="StockIssuedDuringPeriodValueStockSplits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_StockIssuedDuringPeriodSharesStockSplitsRoundingUp" name="StockIssuedDuringPeriodSharesStockSplitsRoundingUp" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_ConvertedSeriesBPreferredStockToCommonStock" name="ConvertedSeriesBPreferredStockToCommonStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_ConvertedSeriesBPreferredStockToCommonStockShares" name="ConvertedSeriesBPreferredStockToCommonStockShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_PreferredStockAccretion" name="PreferredStockAccretion" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_RepurchaseAndCancellationOfSeriesBPreferredStock" name="RepurchaseAndCancellationOfSeriesBPreferredStock" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_RepurchaseAndCancellationOfSeriesBPreferredStockShares" name="RepurchaseAndCancellationOfSeriesBPreferredStockShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_GainOnCancellationOfPreferredStock" name="GainOnCancellationOfPreferredStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_StockBasedCompensationSharesIssuedForAwardAgreementShares" name="StockBasedCompensationSharesIssuedForAwardAgreementShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_IncreaseDecreaseInDeposit" name="IncreaseDecreaseInDeposit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_SharesIssuedForPrefundedUnits" name="SharesIssuedForPrefundedUnits" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_AccretionOfRedeemableSeriesBPreferredStockDiscount" name="AccretionOfRedeemableSeriesBPreferredStockDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_ConversionOfSeriesBPreferredStockToCommonStock" name="ConversionOfSeriesBPreferredStockToCommonStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_IssuanceToBankLoanOnBuildingAcquisition" name="IssuanceToBankLoanOnBuildingAcquisition" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_DisclosureRentalOperationsAbstract" name="DisclosureRentalOperationsAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_DisclosureLeasesAbstract" name="DisclosureLeasesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_AllowanceForDoubtfulAccountsPolicyTextBlock" name="AllowanceForDoubtfulAccountsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_WarrantsPolicyTextBlock" name="WarrantsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_LeaseCostTable1TextBlock" name="LeaseCostTable1TextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_DisclosureTable" name="DisclosureTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="FCUV_DisclosureLineItem" name="DisclosureLineItem" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_ForeignCurrencyExchangeRateTranslation2" name="ForeignCurrencyExchangeRateTranslation2" nillable="true" xbrli:periodType="duration" type="xbrli:pureItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_OperatingLeaseWeightedAverageRemainingLeaseTerm" name="OperatingLeaseWeightedAverageRemainingLeaseTerm" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_LongTermDebtInterest" name="LongTermDebtInterest" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms1" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms1" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_ArmisticeCapitalMasterFundLtdMember" name="ArmisticeCapitalMasterFundLtdMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_SeriesACommonWarrantMember" name="SeriesACommonWarrantMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_SeriesBCommonWarrantMember" name="SeriesBCommonWarrantMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_FloorRateMember" name="FloorRateMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_CustomerAMember" name="CustomerAMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_CustomerBMember" name="CustomerBMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_CustomerDMember" name="CustomerDMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_CustomerCMember" name="CustomerCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_CustomerEMember" name="CustomerEMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="FCUV_GreatPointCapitalLLCMember" name="GreatPointCapitalLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
</schema>
