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	  <link:definition>00000060 - Disclosure - Subsequent Events (Details Narrative)</link:definition>
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	  <link:usedOn>link:calculationLink</link:usedOn>
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	<link:linkbaseRef xlink:type="simple" xlink:href="fsbc-20210630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Presentation Links" />
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    <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
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    <element id="fsbc_UndisbursedAgriculturalRealEstateLoansMember" name="UndisbursedAgriculturalRealEstateLoansMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="fsbc_ServiceChargesOnDepositAccounts" name="ServiceChargesOnDepositAccounts" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="fsbc_LoanRelatedFees" name="LoanRelatedFees" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="fsbc_LoanRelatedExpenses" name="LoanRelatedExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="fsbc_ReclassificationAdjustmentForNetRealizedGainsIncludedInNetIncome" name="ReclassificationAdjustmentForNetRealizedGainsIncludedInNetIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="fsbc_StockIssuedToDirectors" name="StockIssuedToDirectors" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="fsbc_TransferFromLoansHeldForInvestmentToLoansHeldForSale" name="TransferFromLoansHeldForInvestmentToLoansHeldForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="fsbc_DisclosureInvestmentSecuritiesDetails5Abstract" name="DisclosureInvestmentSecuritiesDetails5Abstract" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
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    <element id="fsbc_PercentageOfLargestSingleDepositToDeposits" name="PercentageOfLargestSingleDepositToDeposits" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
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