As previously announced, Zai Lab Limited (the “Company”) appointed Joshua Smiley as the Company's Chief Operating Officer, effective on August 1, 2022, following the completion of his leave with his former employer. Mr. Smiley, aged 53, began his career at Eli Lilly and Company in 1995 holding leadership positions across the organization, including serving as Senior Vice President and Chief Financial Officer. Mr. Smiley earned his bachelor's degree in history from Harvard College in 1993.There are no arrangements or understandings between Mr. Smiley and any other person pursuant to which he was appointed as Chief Operating Officer, nor are there any transactions between Mr. Smiley and the Company that would be reportable under Item 404(a) of Regulation S-K. There are no family relationships between Mr. Smiley and any of our directors or executive officers.