Zai Lab Limited — Report Publication Announcement 2021

Feb 16, 2021

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

==> picture [72 x 51] intentionally omitted <==

**Zai Lab Limited 再鼎醫藥有限公司 ***

(Incorporated in the Cayman Islands with limited liability)

(Stock Code: 9688)

NOTICE OF BOARD ACTION AND DATE OF PUBLICATION OF FISCAL YEAR 2020 RESULTS ANNOUNCEMENT

Our board of directors will consider and vote on, among other matters, our audited results announcement for the fiscal year ended December 31, 2020 (“ Results ”) on Sunday, February 28, 2021 (Hong Kong time). If approved, we will announce our Results at or around 8:00 p.m. on Monday, March 1, 2021 (Hong Kong time) on the website of the Hong Kong Stock Exchange at www.hkexnews.hk and our Company website at www.zailaboratory.com.

After the Results have been approved and released, our management plans to host a live earnings teleconference call and webcast on Monday, March 1, 2021 (Hong Kong time) to discuss the Results and answer questions. For details of the call arrangements, please refer to the Results.

By order of the Board Zai Lab Limited Samantha Du

Director, Chairperson and Chief Executive Officer

Hong Kong February 16, 2021

As at the date of this announcement, the board of directors of the Company comprises Dr. Samantha Du and Mr. Tao Fu as the directors, and Dr. Kai-Xian Chen, Dr. John Diekman, Ms. Nisa Leung, Mr. William Lis, Mr. Leon O. Moulder, Jr. and Mr. Peter Wirth as the independent directors.

• For identification only