Shanghai Junshi Biosciences : OVERSEAS REGULATORY ANNOUNCEMENT - SHANGHAI JUNSHI BIOSCIENCES CO., LTD.* ANNOUNCEMENT ON RESOLUTIONS OF THE TWENTY-SIXTH MEETING OF THE SECOND SESSION OF THE BOARD OF DIRECTORS

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 Resolutions of the Twenty-sixth Meeting of the Second Session of the Board of Directors" 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, 28 August 2020

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, Dr. Wu Hai and Dr. Yao Sheng as executive Directors; Mr. Tang Yi, Mr. Li Cong, Mr. Yi Qingqing and Mr. Lin Lijun as non-executive Directors; and Dr. Chen Lieping, Mr. Chen Xinjun, Mr. Qian Zhi, Mr. Zhang Chun and Dr. Roy Steven Herbst as independent non-executive Directors.

• For identification purposes only

Stock code: 688180

Stock abbreviation: Junshi Bio Announcement No.: Lin 2020-008

Shanghai Junshi Biosciences Co., Ltd.*

Announcement on Resolutions of the Twenty-sixth Meeting of the Second Session of the Board of Directors

The Board of Directors of the Company and all Directors warrant that there is no false and misleading statement or material omission in the contents of the announcement, and shall undertake legal liabilities in accordance with the law for the truthfulness, accuracy and completeness of the contents herein.

I. Convening of the Meeting of the Board of Directors

Shanghai Junshi Biosciences Co., Ltd.* (hereinafter referred to as "the "Company") convened, by means of voting at the site meeting and via correspondence, the twenty-sixth meeting of the second session of the Board of Directors at the conference room of the Company on 28 August 2020. The notice of such meeting was dispatched by post to all directors on 14 August 2020. The meeting was chaired by the chairman, Mr. Xiong Jun. 15 directors were eligible to attend the meeting, and 15 directors attended the meeting. The procedures for convening and holding such meeting were in compliance with the relevant regulations of the Company Law of the People's Republic of China and the Articles of Association of Shanghai Junshi Biosciences Co., Ltd.* (hereinafter referred to as the "Articles of Association"), and the resolutions passed thereat were legal and valid.

II. Consideration of Resolutions at the Meeting of the Board of Directors

1. "Resolution on the 2020 Half-year Reports and Their Summaries of the Company" was considered and approved

The 2020 half-year reports of the Company include the half-year report for A shares and the half-year report for H shares. In particular, the half-year report for A shares, including the full text of the 2020 half-year report and the summary of the 2020 half-year report, is prepared in accordance with the requirements of the relevant domestic laws and regulations of the PRC and detailed in the announcement disclosed by the Company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same date; the half-year report for H shares, including the interim results announcement for the six months ended 30 June 2020 and the 2020 half-year report, is prepared in accordance with the requirements of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited, etc., and for details of the interim results announcement for the six months ended 30 June 2020, please refer to the announcement disclosed by the Company on the website of the Hong Kong Stock Exchange (www.hkexnews.hk) on the same date.

Voting results: For: 15; Against: 0; Abstain: 0.

1. "Resolution on Partial Change in Use of Proceeds from Initial Public Offering of H Shares" was considered and approved
   Voting results: For: 15; Against: 0; Abstain: 0.

1. "Resolution on Replacement of Self-raised Funds Invested in Advance with Proceeds Raised from the Issuance" was considered and approved
   Voting results: For: 15; Against: 0; Abstain: 0.
   For details, please refer to the announcement disclosed by the Company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same date.
   The independent non-executive directors expressed independent approval opinions on such matter, and for details, please refer to the "Independent Opinions of Independent Non-executive Directors on the Relevant Matters of the Twenty-sixth Meeting of the Second Session of the Board of Directors" disclosed by the Company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same date.

(IV) "Resolution on Capital Increase to Subsidiaries" was considered and approved

Voting results: For: 15; Against: 0; Abstain: 0.

For details, please refer to the announcement disclosed by the Company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same date.

1. "Resolution on Establishment of a Subsidiary" was considered and approved
   Voting results: For: 15; Against: 0; Abstain: 0.
   (VI) "Resolution on Appointment of Senior Management" was considered

and approved

Voting results: For: 15; Against: 0; Abstain: 0.

For details, please refer to the announcement disclosed by the Company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same date.

The independent non-executive directors expressed independent approval opinions on such matter, and for details, please refer to the "Independent Opinions of Independent Non-executive Directors on the Relevant Matters of the Twenty-sixth Meeting of the Second Session of the Board of Directors" disclosed by the Company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same date.

(VII) "Resolution on Fulfillment of Exercise Conditions for the First Exercise Period under the 2018 Share Option Incentive Scheme" was considered and approved

Voting results: For: 15; Against: 0; Abstain: 0.

For details, please refer to the announcement disclosed by the Company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same date.

The independent non-executive directors expressed independent approval opinions on such matter, and for details, please refer to the "Independent Opinions of Independent Non-executive Directors on the Relevant Matters of the Twenty-sixth Meeting of the Second Session of the Board of Directors" disclosed by the Company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same date.

This announcement is hereby given.

Shanghai Junshi Biosciences Co., Ltd.*

Board of Directors

29 August 2020

• For identification purposes only