content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001985694</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001704292</issuerCik>
        <issuerName>Zai Lab Ltd</issuerName>
        <secFileNumber>001-38205</secFileNumber>
        <issuerAddress>
          <com:street1>4560 JINKE ROAD</com:street1>
          <com:street2>BLDG. 1, 4F, PUDONG</com:street2>
          <com:city>SHANGHAI</com:city>
          <com:stateOrCountry>F4</com:stateOrCountry>
          <com:zipCode>201210</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>862161632588</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Chen Yajing</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>American Depositary Shares</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Brokerage Services LLC</name>
          <address>
            <com:street1>900 Salem Street</com:street1>
            <com:city>Smithfield</com:city>
            <com:stateOrCountry>RI</com:stateOrCountry>
            <com:zipCode>02917</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>422</noOfUnitsSold>
        <aggregateMarketValue>6779.13</aggregateMarketValue>
        <noOfUnitsOutstanding>762101560</noOfUnitsOutstanding>
        <approxSaleDate>08/15/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>08/14/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>422</amountOfSecuritiesAcquired>
        <paymentDate>08/14/2024</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Yajing Chen</name>
          <address>
            <com:street1>4560 Jinke Road</com:street1>
            <com:street2>Bldg. 1, Fourth Floor, Pudong</com:street2>
            <com:city>Shanghai</com:city>
            <com:stateOrCountry>F4</com:stateOrCountry>
            <com:zipCode>201210</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>American Depositary Shares</securitiesClassTitle>
        <saleDate>06/26/2024</saleDate>
        <amountOfSecuritiesSold>2154</amountOfSecuritiesSold>
        <grossProceeds>38559.40</grossProceeds>
      </securitiesSoldInPast3Months>
      <remarks>Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.</remarks>
      <noticeSignature>
        <noticeDate>08/15/2024</noticeDate>
        <signature>/s/ Emily Navaro, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for  Yajing Chen.</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
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text: 144
  0001985694
  XXXXXXXX
  LIVE
  0001704292
  Zai Lab Ltd
  001-38205
  4560 JINKE ROAD
  BLDG. 1, 4F, PUDONG
  SHANGHAI
  F4
  201210
  862161632588
  Chen Yajing
  Officer
  American Depositary Shares
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  422
  6779.13
  762101560
  08/15/2024
  NASDAQ
  Common
  08/14/2024
  Restricted Stock Vesting
  Issuer
  N
  422
  08/14/2024
  Compensation
  N
  Yajing Chen
  4560 Jinke Road
  Bldg. 1, Fourth Floor, Pudong
  Shanghai
  F4
  201210
  American Depositary Shares
  06/26/2024
  2154
  38559.40
  Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
  08/15/2024
  /s/ Emily Navaro, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for  Yajing Chen.