Zai Lab Limited (ZLAB) 10-Q 2023 Q3 Quarterly report

Exhibit 32.2

Certification by the Principal Financial Officer

Pursuant to 18 U.S.C. Section 1350,

As Adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q for the quarter ended September 30, 2023 of Zai Lab Limited (the “Company”), as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Yajing Chen, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 7, 2023	/s/ Yajing Chen
	Yajing Chen
	Chief Financial Officer
	(Principal Financial and Accounting Officer)