<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>271</ContextCount>
  <ElementCount>361</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>109</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>995100 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/dei/role/document/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>995301 - Statement - Unaudited Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ConsolidatedBalanceSheet</Role>
      <ShortName>Unaudited Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>995302 - Statement - Unaudited Consolidated Balance Sheets (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ConsolidatedBalanceSheet_Parentheticals</Role>
      <ShortName>Unaudited Consolidated Balance Sheets (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>995303 - Statement - Unaudited Consolidated Statements of Operations and Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ConsolidatedIncomeStatement</Role>
      <ShortName>Unaudited Consolidated Statements of Operations and Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>995304 - Statement - Unaudited Consolidated Statements of Change in Shareholders??? Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ShareholdersEquityType2or3</Role>
      <ShortName>Unaudited Consolidated Statements of Change in Shareholders??? Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>995305 - Statement - Unaudited Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ConsolidatedCashFlow</Role>
      <ShortName>Unaudited Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>995306 - Disclosure - Organization and Principal Activities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/OrganizationandPrincipalActivities</Role>
      <ShortName>Organization and Principal Activities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995307 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/SummaryofSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995308 - Disclosure - Short Term Investment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ShortTermInvestment</Role>
      <ShortName>Short Term Investment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995309 - Disclosure - Concentration on Revenues and Cost of Goods Sold</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ConcentrationonRevenuesandCostofGoodsSold</Role>
      <ShortName>Concentration on Revenues and Cost of Goods Sold</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995310 - Disclosure - Accounts Receivable, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/AccountsReceivableNet</Role>
      <ShortName>Accounts Receivable, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995311 - Disclosure - Inventories, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/InventoriesNet</Role>
      <ShortName>Inventories, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995312 - Disclosure - Notes Receivable</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/NotesReceivable</Role>
      <ShortName>Notes Receivable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995313 - Disclosure - Property, Plant and Equipment, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/PropertyPlantandEquipmentNet</Role>
      <ShortName>Property, Plant and Equipment, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995314 - Disclosure - Land Use Rights</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/LandUseRights</Role>
      <ShortName>Land Use Rights</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995315 - Disclosure - Fixed Deposit</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/FixedDeposit</Role>
      <ShortName>Fixed Deposit</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995316 - Disclosure - Notes Payable</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/NotesPayable</Role>
      <ShortName>Notes Payable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995317 - Disclosure - Accounts Payable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/AccountsPayable</Role>
      <ShortName>Accounts Payable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995318 - Disclosure - Other Current Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/OtherCurrentLiabilities</Role>
      <ShortName>Other Current Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995319 - Disclosure - Deferred Revenue</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/DeferredRevenue</Role>
      <ShortName>Deferred Revenue</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995320 - Disclosure - Warrant Liability</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/WarrantLiability</Role>
      <ShortName>Warrant Liability</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995321 - Disclosure - Shareholder's Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ShareholdersEquity</Role>
      <ShortName>Shareholder's Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995322 - Disclosure - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/EarningsPerShare</Role>
      <ShortName>Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995323 - Disclosure - Geographical Sales and Segments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/GeographicalSalesandSegments</Role>
      <ShortName>Geographical Sales and Segments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995324 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995325 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/CommitmentsandContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995326 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995327 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>995410 - Disclosure - Pay vs Performance Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/PvpDisclosure</Role>
      <ShortName>Pay vs Performance Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>996000 - Disclosure - Accounting Policies, by Policy (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/AccountingPoliciesByPolicy</Role>
      <ShortName>Accounting Policies, by Policy (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>996001 - Disclosure - Organization and Principal Activities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/OrganizationandPrincipalActivitiesTables</Role>
      <ShortName>Organization and Principal Activities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/OrganizationandPrincipalActivities</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>996002 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/SummaryofSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>996003 - Disclosure - Concentration on Revenues and Cost of Goods Sold (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ConcentrationonRevenuesandCostofGoodsSoldTables</Role>
      <ShortName>Concentration on Revenues and Cost of Goods Sold (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/ConcentrationonRevenuesandCostofGoodsSold</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>996004 - Disclosure - Accounts Receivable, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/AccountsReceivableNetTables</Role>
      <ShortName>Accounts Receivable, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/AccountsReceivableNet</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>996005 - Disclosure - Inventories, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/InventoriesNetTables</Role>
      <ShortName>Inventories, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/InventoriesNet</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>996006 - Disclosure - Notes Receivable (Tables)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/NotesReceivableTables</Role>
      <ShortName>Notes Receivable (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/NotesReceivable</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>996007 - Disclosure - Property, Plant and Equipment, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/PropertyPlantandEquipmentNetTables</Role>
      <ShortName>Property, Plant and Equipment, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/PropertyPlantandEquipmentNet</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>996008 - Disclosure - Land Use Rights (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/LandUseRightsTables</Role>
      <ShortName>Land Use Rights (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/LandUseRights</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>996009 - Disclosure - Fixed Deposit (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/FixedDepositTables</Role>
      <ShortName>Fixed Deposit (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/FixedDeposit</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>996010 - Disclosure - Notes Payable (Tables)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/NotesPayableTables</Role>
      <ShortName>Notes Payable (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/NotesPayable</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>996011 - Disclosure - Accounts Payable (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/AccountsPayableTables</Role>
      <ShortName>Accounts Payable (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/AccountsPayable</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>996012 - Disclosure - Other Current Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/OtherCurrentLiabilitiesTables</Role>
      <ShortName>Other Current Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/OtherCurrentLiabilities</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>996013 - Disclosure - Deferred Revenue (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/DeferredRevenueTables</Role>
      <ShortName>Deferred Revenue (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/DeferredRevenue</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>996014 - Disclosure - Warrant Liability (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/WarrantLiabilityTables</Role>
      <ShortName>Warrant Liability (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/WarrantLiability</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>996015 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/EarningsPerShareTables</Role>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/EarningsPerShare</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>996016 - Disclosure - Geographical Sales and Segments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/GeographicalSalesandSegmentsTables</Role>
      <ShortName>Geographical Sales and Segments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/GeographicalSalesandSegments</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>996017 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/CommitmentsandContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/CommitmentsandContingencies</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>996018 - Disclosure - Related Party Transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/RelatedPartyTransactionsTables</Role>
      <ShortName>Related Party Transactions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/RelatedPartyTransactions</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>996019 - Disclosure - Organization and Principal Activities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/OrganizationandPrincipalActivitiesDetails</Role>
      <ShortName>Organization and Principal Activities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/OrganizationandPrincipalActivitiesTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>996020 - Disclosure - Organization and Principal Activities - Schedule of Subsidiaries Included in these Unaudited Consolidated Financial Statements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofSubsidiariesIncludedintheseUnauditedConsolidatedFinancialStatementsTable</Role>
      <ShortName>Organization and Principal Activities - Schedule of Subsidiaries Included in these Unaudited Consolidated Financial Statements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>996021 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/SummaryofSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>996022 - Disclosure - Summary of Significant Accounting Policies - Schedule of Consolidated Financial Statements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofConsolidatedFinancialStatementsTable</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Consolidated Financial Statements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>996023 - Disclosure - Summary of Significant Accounting Policies - Schedule of Reconciliation of Cash and Cash Equivalents (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofReconciliationofCashandCashEquivalentsTable</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Reconciliation of Cash and Cash Equivalents (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>996024 - Disclosure - Summary of Significant Accounting Policies - Schedule of Fair Value Measurements of Assets and Liabilities that are Measured at Fair Value on a Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofFairValueMeasurementsofAssetsandLiabilitiesthatareMeasuredatFairValueonaRecurringBasisTable</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Fair Value Measurements of Assets and Liabilities that are Measured at Fair Value on a Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>996025 - Disclosure - Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofEstimatedUsefulLivesTable</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>996026 - Disclosure - Summary of Significant Accounting Policies - Schedule of Movement in Contract Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofMovementinContractLiabilitiesTable</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Movement in Contract Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>996027 - Disclosure - Summary of Significant Accounting Policies - Schedule of Disaggregation of Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofDisaggregationofRevenueTable</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Disaggregation of Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>996028 - Disclosure - Short Term Investment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ShortTermInvestmentDetails</Role>
      <ShortName>Short Term Investment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/ShortTermInvestment</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>996029 - Disclosure - Concentration on Revenues and Cost of Goods Sold (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ConcentrationonRevenuesandCostofGoodsSoldDetails</Role>
      <ShortName>Concentration on Revenues and Cost of Goods Sold (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/ConcentrationonRevenuesandCostofGoodsSoldTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>996030 - Disclosure - Concentration on Revenues and Cost of Goods Sold - Schedule of Concentration of Major Customers and Suppliers (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofConcentrationofMajorCustomersandSuppliersTable</Role>
      <ShortName>Concentration on Revenues and Cost of Goods Sold - Schedule of Concentration of Major Customers and Suppliers (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>996031 - Disclosure - Concentration on Revenues and Cost of Goods Sold - Schedule of Major Customers of Accounts Receivable, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofMajorCustomersofAccountsReceivableNetTable</Role>
      <ShortName>Concentration on Revenues and Cost of Goods Sold - Schedule of Major Customers of Accounts Receivable, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>996032 - Disclosure - Accounts Receivable, Net - Schedule of Accounts Receivable is Net of Allowance for Expected Credit Losses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofAccountsReceivableisNetofAllowanceforExpectedCreditLossesTable</Role>
      <ShortName>Accounts Receivable, Net - Schedule of Accounts Receivable is Net of Allowance for Expected Credit Losses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>996033 - Disclosure - Accounts Receivable, Net - Schedule of Changes in the Allowance for Expected Credit Losses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofChangesintheAllowanceforExpectedCreditLossesTable</Role>
      <ShortName>Accounts Receivable, Net - Schedule of Changes in the Allowance for Expected Credit Losses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>996034 - Disclosure - Inventories, Net - Schedule of Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofInventoriesTable</Role>
      <ShortName>Inventories, Net - Schedule of Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>996035 - Disclosure - Inventories, Net - Schedule of Changes in Inventory Reserves (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofChangesinInventoryReservesTable</Role>
      <ShortName>Inventories, Net - Schedule of Changes in Inventory Reserves (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>996036 - Disclosure - Notes Receivable (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/NotesReceivableDetails</Role>
      <ShortName>Notes Receivable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/NotesReceivableTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>996037 - Disclosure - Notes Receivable - Schedule of Notes Receivable (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofNotesReceivableTable</Role>
      <ShortName>Notes Receivable - Schedule of Notes Receivable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>996038 - Disclosure - Property, Plant and Equipment, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/PropertyPlantandEquipmentNetDetails</Role>
      <ShortName>Property, Plant and Equipment, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/PropertyPlantandEquipmentNetTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>996039 - Disclosure - Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofPropertyPlantandEquipmentTable</Role>
      <ShortName>Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>996040 - Disclosure - Land Use Rights - Schedule of Land Use Rights (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofLandUseRightsTable</Role>
      <ShortName>Land Use Rights - Schedule of Land Use Rights (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>996041 - Disclosure - Land Use Rights - Schedule of Estimated Future Amortization Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofEstimatedFutureAmortizationExpenseTable</Role>
      <ShortName>Land Use Rights - Schedule of Estimated Future Amortization Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>996042 - Disclosure - Fixed Deposit (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/FixedDepositDetails</Role>
      <ShortName>Fixed Deposit (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/FixedDepositTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>996043 - Disclosure - Fixed Deposit - Schedule of Fixed Deposit (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofFixedDepositTable</Role>
      <ShortName>Fixed Deposit - Schedule of Fixed Deposit (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>996044 - Disclosure - Notes Payable (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/NotesPayableDetails</Role>
      <ShortName>Notes Payable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/NotesPayableTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>996045 - Disclosure - Notes Payable - Schedule of Notes Payable (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofNotesPayableTable</Role>
      <ShortName>Notes Payable - Schedule of Notes Payable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>996046 - Disclosure - Accounts Payable - Schedule of Accounts Payable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofAccountsPayableTable</Role>
      <ShortName>Accounts Payable - Schedule of Accounts Payable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>996047 - Disclosure - Other Current Liabilities - Schedule of Other Current Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofOtherCurrentLiabilitiesTable</Role>
      <ShortName>Other Current Liabilities - Schedule of Other Current Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>996048 - Disclosure - Deferred Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/DeferredRevenueDetails</Role>
      <ShortName>Deferred Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/DeferredRevenueTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>996049 - Disclosure - Deferred Revenue - Schedule of Deferred Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofDeferredRevenueTable</Role>
      <ShortName>Deferred Revenue - Schedule of Deferred Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>996050 - Disclosure - Deferred Revenue - Schedule of Changes in Deferred Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofChangesinDeferredRevenueTable</Role>
      <ShortName>Deferred Revenue - Schedule of Changes in Deferred Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>996051 - Disclosure - Warrant Liability (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/WarrantLiabilityDetails</Role>
      <ShortName>Warrant Liability (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/WarrantLiabilityTables</ParentRole>
      <Position>82</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>996052 - Disclosure - Warrant Liability - Schedule of Fair Value of the Warrant Liabilities was Measured Using a Black???Scholes Model (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofFairValueoftheWarrantLiabilitieswasMeasuredUsingaBlackScholesModelTable</Role>
      <ShortName>Warrant Liability - Schedule of Fair Value of the Warrant Liabilities was Measured Using a Black???Scholes Model (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>996053 - Disclosure - Warrant Liability - Schedule of Warrants Outstanding and Fair Values (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofWarrantsOutstandingandFairValuesTable</Role>
      <ShortName>Warrant Liability - Schedule of Warrants Outstanding and Fair Values (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>996054 - Disclosure - Shareholder's Equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ShareholdersEquityDetails</Role>
      <ShortName>Shareholder's Equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/ShareholdersEquity</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>996055 - Disclosure - Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/EarningsPerShareDetails</Role>
      <ShortName>Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/EarningsPerShareTables</ParentRole>
      <Position>86</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>996056 - Disclosure - Earnings Per Share - Schedule of Basic and Diluted Earnings Per Share Computation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofBasicandDilutedEarningsPerShareComputationTable</Role>
      <ShortName>Earnings Per Share - Schedule of Basic and Diluted Earnings Per Share Computation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>996057 - Disclosure - Geographical Sales and Segments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/GeographicalSalesandSegmentsDetails</Role>
      <ShortName>Geographical Sales and Segments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/GeographicalSalesandSegmentsTables</ParentRole>
      <Position>88</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>996058 - Disclosure - Geographical Sales and Segments - Schedule of Sales by Geographical Area (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofSalesbyGeographicalAreaTable</Role>
      <ShortName>Geographical Sales and Segments - Schedule of Sales by Geographical Area (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>996059 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/IncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/IncomeTaxes</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>996060 - Disclosure - Commitments and Contingencies - Schedule of Non-Cancellable Future Minimum Lease Payments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofNonCancellableFutureMinimumLeasePaymentsTable</Role>
      <ShortName>Commitments and Contingencies - Schedule of Non-Cancellable Future Minimum Lease Payments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>996061 - Disclosure - Related Party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/RelatedPartyTransactionsDetails</Role>
      <ShortName>Related Party Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://greenlandtechnologiesholdingcorp.com/role/RelatedPartyTransactionsTables</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>996062 - Disclosure - Related Party Transactions - Schedule of Names and Relationship of Related Parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofNamesandRelationshipofRelatedPartiesTable</Role>
      <ShortName>Related Party Transactions - Schedule of Names and Relationship of Related Parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="ea0290135-10q_greenland.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>996063 - Disclosure - Related Party Transactions - Schedule of Related Parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://greenlandtechnologiesholdingcorp.com/role/ScheduleofRelatedPartiesTable</Role>
      <ShortName>Related Party Transactions - Schedule of Related Parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="ea0290135-10q_greenland.htm">ea0290135-10q_greenland.htm</File>
    <File>gtec-20260331.xsd</File>
    <File>gtec-20260331_cal.xml</File>
    <File>gtec-20260331_def.xml</File>
    <File>gtec-20260331_lab.xml</File>
    <File>gtec-20260331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="801">http://fasb.org/us-gaap/2026</BaseTaxonomy>
    <BaseTaxonomy items="31">http://xbrl.sec.gov/dei/2026</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/ecd/2026</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
