Shanghai Junshi Biosciences : OVERSEAS REGULATORY ANNOUNCEMENT - SHANGHAI JUNSHI BIOSCIENCES CO., LTD.* ANNOUNCEMENT ON APPOINTMENT OF SECURITIES AFFAIRS REPRESENTATIVE

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.

SHANGHAI JUNSHI BIOSCIENCES CO., LTD.*

上海君實生物醫藥科技股份有限公司

(a joint stock company incorporated in the People's Republic of China with limited liability)

(Stock code: 1877)

OVERSEAS REGULATORY ANNOUNCEMENT

This announcement is made pursuant to Rule 13.10B of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited.

Reference is made to the "Shanghai Junshi Biosciences Co., Ltd.* Announcement on Appointment of Securities Affairs Representative" published by Shanghai Junshi Biosciences Co., Ltd. on the website of the Shanghai Stock Exchange, for reference purpose only. The following is a translation of the official announcement solely for the purpose of providing information. Should there be any discrepancies, the Chinese version will prevail.

By order of the Board

Shanghai Junshi Biosciences Co., Ltd.*

Mr. Xiong Jun

Chairman

Shanghai, the PRC, 30 March 2021

As at the date of this announcement, the board of directors of the Company comprises Mr. Xiong Jun, Dr. Li Ning, Dr. Feng Hui, Mr. Zhang Zhuobing and Dr. Yao Sheng as executive Directors; Dr. Wu Hai, Mr. Tang Yi, Mr. Li Cong, Mr. Yi Qingqing and Mr. Lin Lijun as non-executive Directors; and Dr. Chen Lieping, Mr. Qian Zhi, Mr. Zhang Chun, Dr. Jiang Hualiang and Dr. Roy Steven Herbst as independent non-executive Directors.

• For identification purpose only

Stock code: 688180

Stock short name: Junshi Bio

Announcement No.: Lin 2021-030

Shanghai Junshi Biosciences Co., Ltd.*

Announcement on Appointment of

Securities Affairs Representative

The Board of Directors and all Directors of the Company warrant that the contents of the announcement do not contain any false and misleading statement or material omission, and shall undertake legal liabilities in accordance with the law for the truthfulness, accuracy and completeness of the contents herein.

The "Resolution on Appointment of Securities Affairs Representative" was considered and approved at the thirty-fourth meeting of the second session of the Board of Directors of Shanghai Junshi Biosciences Co., Ltd.* (the "Company") held on 30 March 2021. The Board of Directors agreed to appoint Mr. Wang Zhengyu (for his biography, see the attachment) as the securities affairs representative of the Company to assist the secretary to the Board of Directors, effective from the date on which the "Resolution on Appointment of Securities Affairs Representative" is considered and approved at the thirty-fourth meeting of the second session of the Board of Directors until the expiry of the second session of the Board of Directors.

Mr. Wang Zhengyu has obtained the secretary of the board of directors qualification certificate from the STAR Market of Shanghai Stock Exchange. He possesses expertise, work experience and relevant qualities necessary to perform duties, and is able to meet the requirements of relevant job duties. His qualifications for appointment are in compliance with the qualifications for appointment required under relevant laws, regulations and normative documents, including the Company Law of the People's Republic of China and the Rules Governing the Listing of Stocks on the STAR Market of Shanghai Stock Exchange. Mr. Wang Zhengyu has not been subject to any punishment by the China Securities Regulatory Commission, the

Shanghai Stock Exchange and other competent authorities or reprimand by any stock exchanges, and he is also not a dishonest person subject to enforcement. He is not related to any controlling shareholders, de facto controller of the Company and shareholders with more than 5% shareholding, directors, supervisors and senior management of the Company.

Contact of Mr. Wang Zhengyu: Tel: [phone] Fax: [phone]

E-mail: [e-mail]

Office address: Level 13, Building 2, Nos. 36 and 58, Hai Qu Road, China (Shanghai) Pilot Free Trade Zone, the PRC.

Announcement is hereby given.

Shanghai Junshi Biosciences Co., Ltd.*

Board of Directors

31 March 2021

Attachment: Biography

Wang Zhengyu, born in April 1995, is of Chinese nationality (without foreign

permanent residency), obtained a bachelor's degree in pharmacy from Shenyang

Pharmaceutical University in 2017, is currently pursuing his master's degree in law in Tongji University and has obtained the national legal professional qualification and the qualification to serve as a secretary to the board of directors from the STAR Market of Shanghai Stock Exchange. Mr. Wang Zhengyu has previously worked in the securities legal affairs department of Jiangsu Hengrui Medicine Co., Ltd. and has been serving as manager of the securities department of Shanghai Junshi Biosciences Co., Ltd. since May 2019.