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Vested shares will be delivered to the reporting person following vesting."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The Restricted Share Units vest in equal annual installments over five years beginning on 10/01/2022, the first anniversary of the date of grant. Vested shares will be delivered to the reporting person following vesting."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"Each American Depositary Share (ADS) represents ten Ordinary Shares of the issuer. Our ADSs and Ordinary Shares are fully fungible. 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Our ADSs and Ordinary Shares are fully fungible. For purposes of this Form 4, we are reporting this in terms of ADSs."},{"field":"kind","element":"transactionCoding","label":"F4","text":"This transaction represents the disposition of shares to the issuer to cover taxes."}],"balance_after":6647,"source":{"system":"sec-edgar","filing":"0000905148-23-001084","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1704292/000090514823001084/form4.xml","form_type":"4"}},{"id":1766486,"issuer":{"id":4271,"kind":"organization","name":"Zai Lab Ltd","symbol":"ZLAB"},"owners":[{"id":20729,"kind":"person","name":"Chen Yajing","position":1,"cik":"0001985694","reported_name":"Chen Yajing","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"American Depositary Shares","published_at":"2023-10-03T21:03:35.000Z","date":"2023-09-29","kind":"exercise","planned":false,"acquired":true,"shares":920,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"Each American Depositary Share (ADS) represents ten Ordinary Shares of the issuer. Our ADSs and Ordinary Shares are fully fungible. For purposes of this Form 4, we are reporting this in terms of ADSs."},{"field":"shares","element":"transactionShares","label":"F2","text":"ADSs acquired on vesting of Restricted Share Units. 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