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<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2022-02-28T06:49:56.3708925+00:00 -->
<!-- Version            : 5.0.1.728 -->
<!-- Package ID         : cc5966977f0a456eb8c358125e0ac3ae -->
<!-- Copyright (c) 2022 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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  <xsd:element id="fgen_ScheduleOfMaturitiesOfFinanceAndOperatingLeasesLiabilitiesTableTextBlock" name="ScheduleOfMaturitiesOfFinanceAndOperatingLeasesLiabilitiesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_ScheduleOfSharesOfCommonStockReservedForFutureIssuanceTableTextBlock" name="ScheduleOfSharesOfCommonStockReservedForFutureIssuanceTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_ScheduleOfShareBasedPaymentAwardStockOptionsAndEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" name="ScheduleOfShareBasedPaymentAwardStockOptionsAndEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_ScheduleOfIncomeLossBeforeIncomeTaxDomesticAndForeignTableTextBlock" name="ScheduleOfIncomeLossBeforeIncomeTaxDomesticAndForeignTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_InventoryByGeographicAreasTableTextBlock" name="InventoryByGeographicAreasTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_SummaryOfFinanceAndOperatingLeaseRightOfUseAssetsByGeographicalLocationTableTextBlock" name="SummaryOfFinanceAndOperatingLeaseRightOfUseAssetsByGeographicalLocationTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_AccountingPolicyLineItems" name="AccountingPolicyLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_AccountingPolicyTable" name="AccountingPolicyTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_AccountsReceivableFromDistributorsMember" name="AccountsReceivableFromDistributorsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_RoxadustatDrugProductMember" name="RoxadustatDrugProductMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_LaboratoryEquipmentMember" name="LaboratoryEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_AstellasAndAstraZenecaMember" name="AstellasAndAstraZenecaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_HiFiBiOAgreementMember" name="HiFiBiOAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ImpactOfChangeInAccountingPrincipleUponAdoptionOfASU201802Member" name="ImpactOfChangeInAccountingPrincipleUponAdoptionOfASU201802Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_RestrictedTimeDepositsNoncurrent" name="RestrictedTimeDepositsNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_HighlyLiquidInvestmentMaturityPeriod" name="HighlyLiquidInvestmentMaturityPeriod" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_ShortTermInvestmentsMaximumMaturityPeriod" name="ShortTermInvestmentsMaximumMaturityPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_LongTermInvestmentsMinimumMaturityPeriod" name="LongTermInvestmentsMinimumMaturityPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_ProfitSharePercent" name="ProfitSharePercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_DescriptionOfSalesReturn" name="DescriptionOfSalesReturn" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_InitialUpfrontPayment" name="InitialUpfrontPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_MaximumAdditionalFutureOptionClinicalRegulatoryAndCommercialMilestonePayments" name="MaximumAdditionalFutureOptionClinicalRegulatoryAndCommercialMilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_ProceedsFromUpfrontNonContingentAndTimeBasedPayments" name="ProceedsFromUpfrontNonContingentAndTimeBasedPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_CommercialSalesMilestone" name="CommercialSalesMilestone" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_AdditionalConsiderationBasedOnNetSales" name="AdditionalConsiderationBasedOnNetSales" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_PotentialMilestones" name="PotentialMilestones" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_ClinicalDevelopmentMilestonesMember" name="ClinicalDevelopmentMilestonesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_RegulatoryMilestonesMember" name="RegulatoryMilestonesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_CollaborativeArrangementAggregateConsiderationExcludingDrugProductRevenue" name="CollaborativeArrangementAggregateConsiderationExcludingDrugProductRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_TransactionPriceAllocatedToPerformanceObligations" name="TransactionPriceAllocatedToPerformanceObligations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_PercentageOfFundingForCosts" name="PercentageOfFundingForCosts" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_DevelopmentAndRegulatoryApprovalMilestones" name="DevelopmentAndRegulatoryApprovalMilestones" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_ProceedsFromNonContingentUpfrontPayments" name="ProceedsFromNonContingentUpfrontPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_VariableConsiderationPaymentReceivedUponAchievementOfMilestone" name="VariableConsiderationPaymentReceivedUponAchievementOfMilestone" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_VariableConsiderationPaymentReceivedRelatedToCoDevelopmentBillings" name="VariableConsiderationPaymentReceivedRelatedToCoDevelopmentBillings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_ProvisionForCoDevelopmentServices" name="ProvisionForCoDevelopmentServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_CoDevelopmentServicesRelatedToCKDContinuedOverDevelopmentPeriod" name="CoDevelopmentServicesRelatedToCKDContinuedOverDevelopmentPeriod" type="xbrli:gYearMonthItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_ProceedsFromUpfrontNonContingentNonRefundableAndTimeBasedPayments" name="ProceedsFromUpfrontNonContingentNonRefundableAndTimeBasedPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_UnitedStatesAndRestOfWorldMember" name="UnitedStatesAndRestOfWorldMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_DeferredApprovalMilestoneMember" name="DeferredApprovalMilestoneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_FibroGenIncMember" name="FibroGenIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_AccruedAndOtherCurrentLiabilitiesMember" name="AccruedAndOtherCurrentLiabilitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_DirectSalesMember" name="DirectSalesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_SharedDevelopmentCosts" name="SharedDevelopmentCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_ProceedsFromUpfrontNonContingentAndNonRefundablePayments" name="ProceedsFromUpfrontNonContingentAndNonRefundablePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_CommercialSalesAndOtherEventsMilestone" name="CommercialSalesAndOtherEventsMilestone" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_CollaborativeArrangementAggregateConsideration" name="CollaborativeArrangementAggregateConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_ReversalOfAccruedCoPromotionExpenses" name="ReversalOfAccruedCoPromotionExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_CoPromotionExpenses" name="CoPromotionExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_VariableConsiderationRelatedToProfitShare" name="VariableConsiderationRelatedToProfitShare" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_UnitedStatesAndRestOfWorldAndChinaMember" name="UnitedStatesAndRestOfWorldAndChinaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_RoyaltyRateOnNetRevenue" name="RoyaltyRateOnNetRevenue" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="fgen_CoDevelopmentServicesRelatedToCDKContinuedOverDevelopmentYear" name="CoDevelopmentServicesRelatedToCDKContinuedOverDevelopmentYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_FutureManufacturingClinicalRegulatoryAndCommercialMilestonePayments" name="FutureManufacturingClinicalRegulatoryAndCommercialMilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_CommercialMilestone" name="CommercialMilestone" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_CollaborativeArrangementAggregateConsiderationForMilestoneAndUpfrontPayments" name="CollaborativeArrangementAggregateConsiderationForMilestoneAndUpfrontPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_LicenseAgreementWithEluminexMember" name="LicenseAgreementWithEluminexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_CorneaProductsMember" name="CorneaProductsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_PercentageOfProductManufacturingCostsUntilManufacturingTechnologyFullyTransferred" name="PercentageOfProductManufacturingCostsUntilManufacturingTechnologyFullyTransferred" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_NumberOfIdentifiedPerformanceObligationAtInceptionOfAgreement" name="NumberOfIdentifiedPerformanceObligationAtInceptionOfAgreement" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_CashConsiderationReceivedUnderCollaborationAgreement" name="CashConsiderationReceivedUnderCollaborationAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_VariableConsiderationPaymentReceivedFromEstimatedFutureCoDevelopmentBilling" name="VariableConsiderationPaymentReceivedFromEstimatedFutureCoDevelopmentBilling" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_CoDevelopmentInformationSharingAndCommitteeServicesMember" name="CoDevelopmentInformationSharingAndCommitteeServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ChinaPerformanceObligationMember" name="ChinaPerformanceObligationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_SuppliesNet" name="SuppliesNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_RevenueGrossFromContractWithCustomerExcludingAssessedTax" name="RevenueGrossFromContractWithCustomerExcludingAssessedTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_RevenueGrossTransferPriceFromContractWithCustomerExcludingAssessedTax" name="RevenueGrossTransferPriceFromContractWithCustomerExcludingAssessedTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_SalesToFalikangMember" name="SalesToFalikangMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_PriceAdjustmentMember" name="PriceAdjustmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_NonKeyAccountHospitalListingAwardMember" name="NonKeyAccountHospitalListingAwardMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ContractualSalesRebateMember" name="ContractualSalesRebateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_OtherDiscountsAndRebatesMember" name="OtherDiscountsAndRebatesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ProfitShareMember" name="ProfitShareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_NetTransferPriceMember" name="NetTransferPriceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_IncreaseInDeferredRevenueMember" name="IncreaseInDeferredRevenueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_DiscountsAndRebatesMember" name="DiscountsAndRebatesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_DiscountsAndRebatesCurrentMember" name="DiscountsAndRebatesCurrentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_RebatesAndDiscountsMember" name="RebatesAndDiscountsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_GrossAccountsReceivableMember" name="GrossAccountsReceivableMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ContractLiabilitiesMember" name="ContractLiabilitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_DeferredForFutureRecognitionMember" name="DeferredForFutureRecognitionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_BeijingFalikangPharmaceuticalCoLtdMember" name="BeijingFalikangPharmaceuticalCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ContractWithCustomerLiabilityAdditions" name="ContractWithCustomerLiabilityAdditions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_ContractWithCustomerLiabilityDeduction" name="ContractWithCustomerLiabilityDeduction" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_ContractWithCustomerLiabilityIncreaseDecreaseFromCurrentTranslationAndOther" name="ContractWithCustomerLiabilityIncreaseDecreaseFromCurrentTranslationAndOther" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_ContractWithCustomerLiabilityLineItems" name="ContractWithCustomerLiabilityLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ContractWithCustomerLiabilityTable" name="ContractWithCustomerLiabilityTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_AstellasAgreementMember" name="AstellasAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_BulkDrugProductMember" name="BulkDrugProductMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_EUSupplyAndAstellasAgreementMember" name="EUSupplyAndAstellasAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_APIShipmentMember" name="APIShipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_AstraZenecaMember" name="AstraZenecaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ContractWithCustomerLiabilityNetOfBalancePresentedAgainstContractAsset" name="ContractWithCustomerLiabilityNetOfBalancePresentedAgainstContractAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_AcquisitionAndVariableInterestEntityLineItems" name="AcquisitionAndVariableInterestEntityLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_AcquisitionAndVariableInterestEntityTable" name="AcquisitionAndVariableInterestEntityTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_BeijingKangdaYongfuPharmaceuticalCoLTDMember" name="BeijingKangdaYongfuPharmaceuticalCoLTDMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_FibroGenBeijingMember" name="FibroGenBeijingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_AstraZenecaABMember" name="AstraZenecaABMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_EquityMethodInvestmentIncreaseDecreaseFromCurrencyTranslation" name="EquityMethodInvestmentIncreaseDecreaseFromCurrencyTranslation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_USGovernmentBondsMember" name="USGovernmentBondsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_AgencyBondsMember" name="AgencyBondsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_BondAndMutualFundsMember" name="BondAndMutualFundsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_LesseeFinanceLeaseOptionToExtendAdditionalLeaseTerm" name="LesseeFinanceLeaseOptionToExtendAdditionalLeaseTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_LesseeFinanceLeaseAdditionalLeaseExpirationPeriod" name="LesseeFinanceLeaseAdditionalLeaseExpirationPeriod" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_PercentageIncreasesOnEachAnniversaryOfRentCommencementDate" name="PercentageIncreasesOnEachAnniversaryOfRentCommencementDate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_NumberOfOptionalRightsToExtendLease" name="NumberOfOptionalRightsToExtendLease" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_ScheduledRentCommencementYearOptionOne" name="ScheduledRentCommencementYearOptionOne" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_PercentageIncreasesOnAnniversaryOfRentCommencementDateOptionTwo" name="PercentageIncreasesOnAnniversaryOfRentCommencementDateOptionTwo" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_ScheduledRentCommencementYearOptionTwo" name="ScheduledRentCommencementYearOptionTwo" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_LesseeFinanceLeaseExpirationPeriod" name="LesseeFinanceLeaseExpirationPeriod" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_ShorensteinPropertiesLLCMember" name="ShorensteinPropertiesLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_LeaseAmendmentMember" name="LeaseAmendmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_BeijingEconomicTechnologicalDevelopmentAreaMember" name="BeijingEconomicTechnologicalDevelopmentAreaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_OfficeSpacesMember" name="OfficeSpacesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_LesseeOperatingLeaseExpirationPeriod" name="LesseeOperatingLeaseExpirationPeriod" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_FinanceLeaseRightOfUseAssetsCost" name="FinanceLeaseRightOfUseAssetsCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_FinanceLeaseAccumulatedAmortization" name="FinanceLeaseAccumulatedAmortization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_OperatingLeaseRightOfUseAssetsCost" name="OperatingLeaseRightOfUseAssetsCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_OperatingLeaseAccumulatedAmortization" name="OperatingLeaseAccumulatedAmortization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_FinanceLeaseAndOperatingLeaseAssets" name="FinanceLeaseAndOperatingLeaseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_FinanceLeaseAndOperatingLeaseLiability" name="FinanceLeaseAndOperatingLeaseLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" name="CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_NonCashRightOfUseAssetsObtainedInExchangeForNewLeaseLiabilitiesAbstract" name="NonCashRightOfUseAssetsObtainedInExchangeForNewLeaseLiabilitiesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_NonCashIncreaseDecreaseResultingFromLeaseModificationAbstract" name="NonCashIncreaseDecreaseResultingFromLeaseModificationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ScheduleOfLeasesLineItems" name="ScheduleOfLeasesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ScheduleOfLeasesTable" name="ScheduleOfLeasesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_WeightedAverageRemainingLeaseTermAbstract" name="WeightedAverageRemainingLeaseTermAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_WeightedAverageDiscountRateAbstract" name="WeightedAverageDiscountRateAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_AvailableForSaleSecuritiesBondAndMutualFundsMaturingWithinOneYear" name="AvailableForSaleSecuritiesBondAndMutualFundsMaturingWithinOneYear" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_AvailableForSaleSecuritiesBondAndMutualFundsMaturingAfterOneYearThroughThreeYears" name="AvailableForSaleSecuritiesBondAndMutualFundsMaturingAfterOneYearThroughThreeYears" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_HiFiBiOAgreementsMember" name="HiFiBiOAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_PercentageOfPreLaunchInventoryCapitalizedOfAggregateInventoryBalance" name="PercentageOfPreLaunchInventoryCapitalizedOfAggregateInventoryBalance" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="fgen_TransferPriceTrueUp" name="TransferPriceTrueUp" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_AccruedPreclinicalAndClinicalTrialCurrent" name="AccruedPreclinicalAndClinicalTrialCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_AcquiredInProcessResearchAndDevelopmentAsset" name="AcquiredInProcessResearchAndDevelopmentAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_AccruedContractLiabilitiesToPharmaceuticalDistributorsCurrent" name="AccruedContractLiabilitiesToPharmaceuticalDistributorsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_AccruedCoPromotionExpensesCurrent" name="AccruedCoPromotionExpensesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_AccruedProfitShareCurrent" name="AccruedProfitShareCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_PropertyTaxesAndOtherCurrent" name="PropertyTaxesAndOtherCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_AccruedLongTermCoPromotionLiabilityNonCurrent" name="AccruedLongTermCoPromotionLiabilityNonCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_NumberOfProductDevelopmentObligations" name="NumberOfProductDevelopmentObligations" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_BankOfFinlandInterestRateMember" name="BankOfFinlandInterestRateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_AccruedProductDevelopmentCostsExcludingInterest" name="AccruedProductDevelopmentCostsExcludingInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_ManufactureAndSupplyOfRoxadustatMember" name="ManufactureAndSupplyOfRoxadustatMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ManufactureAndSupplyOfPamrevlumabMember" name="ManufactureAndSupplyOfPamrevlumabMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_OtherPurchasesMember" name="OtherPurchasesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_MaximumFutureMilestonePayments" name="MaximumFutureMilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_CommitmentsAndContingenciesLineItems" name="CommitmentsAndContingenciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_CommitmentsAndContingenciesTable" name="CommitmentsAndContingenciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ResearchAndPreClinicalStageDevelopmentProgramsMember" name="ResearchAndPreClinicalStageDevelopmentProgramsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_CommonStockSharesReserved" name="CommonStockSharesReserved" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="fgen_ShareholdersEquityAndStockBasedCompensationAbstract" name="ShareholdersEquityAndStockBasedCompensationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_TwoThousandAndFiveStockPlanMember" name="TwoThousandAndFiveStockPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_TwoThousandAndFourteenEquityIncentivePlanMember" name="TwoThousandAndFourteenEquityIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_StockIssuedDuringPeriodSharesStockOptionsExercisedFullYear" name="StockIssuedDuringPeriodSharesStockOptionsExercisedFullYear" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_TwoThousandAndFourteenEmployeeStockPurchasePlanMember" name="TwoThousandAndFourteenEmployeeStockPurchasePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_StockOptionAwardsMember" name="StockOptionAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ClassOfWarrantOrRightNumberOfWarrantsOrRightsExercisedDuringPeriod" name="ClassOfWarrantOrRightNumberOfWarrantsOrRightsExercisedDuringPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_FibrogenEuropeOyMember" name="FibrogenEuropeOyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_FibroGenCaymanMember" name="FibroGenCaymanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_RequiredMinimumShareholderPercentageToCallForRedemptionOfPreferredShares" name="RequiredMinimumShareholderPercentageToCallForRedemptionOfPreferredShares" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_PreferredSharesIssuedPricePerShare" name="PreferredSharesIssuedPricePerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="fgen_EffectiveIncomeTaxRateReconciliationDeductionExpenseShareBasedCompensationCost" name="EffectiveIncomeTaxRateReconciliationDeductionExpenseShareBasedCompensationCost" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_EffectiveIncomeTaxRateReconciliationBenefitOnIntercompanyTransferOfAssets" name="EffectiveIncomeTaxRateReconciliationBenefitOnIntercompanyTransferOfAssets" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_EffectiveIncomeTaxRateReconciliationValuationAllowanceOnIntercompanyTransferOfAssets" name="EffectiveIncomeTaxRateReconciliationValuationAllowanceOnIntercompanyTransferOfAssets" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_EffectiveIncomeTaxRateReconciliationNetOperatingLossesNotBenefitted" name="EffectiveIncomeTaxRateReconciliationNetOperatingLossesNotBenefitted" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_DeferredTaxAssetsIntangibleAssets" name="DeferredTaxAssetsIntangibleAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_DeferredTaxLiabilitiesFixedAssets" name="DeferredTaxLiabilitiesFixedAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="fgen_IncomeTaxesLineItems" name="IncomeTaxesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_IncomeTaxesTable" name="IncomeTaxesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_OperatingLossCarryforwardsExpirationYear" name="OperatingLossCarryforwardsExpirationYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_OtherTaxCreditCarryforwardsExpirationYear" name="OtherTaxCreditCarryforwardsExpirationYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_ExperienceHistoricalOwnershipChanges" name="ExperienceHistoricalOwnershipChanges" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="fgen_FederalAndStateMember" name="FederalAndStateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_LicenseAndDevelopmentMember" name="LicenseAndDevelopmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_AstellasMember" name="AstellasMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_FalikangMember" name="FalikangMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_MiscellaneousReceivables" name="MiscellaneousReceivables" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="fgen_AllOtherMember" name="AllOtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_OwnershipInUnitedStatesMember" name="OwnershipInUnitedStatesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_OwnershipInChinaMember" name="OwnershipInChinaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_FalikangCollaborationAgreementMember" name="FalikangCollaborationAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="fgen_ValuationAllowanceForRebatesAndDiscountsMember" name="ValuationAllowanceForRebatesAndDiscountsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
</xsd:schema>
