[Temporary Announcement] Jiakai Biotechnology: Announcement of Resolutions of the Eighth Meeting of the Second Board of Directors

Securities code: 920165 Securities abbreviation: Jiakai Biotechnology Announcement number: 2026-090

Shanghai Jiakai Biological Co., Ltd.

Announcement of Resolutions of the Eighth Meeting of the Second Board of Directors

The company and all members of the board of directors guarantee that the contents of the announcement are true, accurate and complete, and that there are no false records, misleading statements or major omissions, and bear individual and joint legal liability for the authenticity, accuracy and completeness of the contents.

1. Meeting convening and attendance

(1) Meeting status

1. Meeting time: September 21, 2026

2. Meeting location: Jiakai Biology Conference Room

3.Meeting method: combination of on-site and communication

4. Time and method of issuing board meeting notice: by communication on September 18, 2026 5. Meeting host: Chairman Mr. Tian Jun

5. Meeting attendees: senior managers

6. Explanation on the legality and compliance of the convening situation:

The convening and convening procedures of this meeting complied with the relevant provisions of the Company Law and the Articles of Association, and the meeting was legal and valid.

(2) Meeting attendance

The meeting should be attended by 9 directors, and 9 directors should be present and authorized to attend.

Directors Huang Haiping, Lu Xia, Xiao Xiao and Liu Penghui participated in the voting by communication due to work reasons.

2. Proposal review status

(1) Consideration and approval of the "Proposal on Appointment of Secretary to the Company's Board of Directors"

1. Contents of the motion:

Mr. Wu Pengfei was appointed as the secretary of the company's board of directors. For details, please refer to the "Announcement on Changes in Senior Management" (announcement number: 2026-089) disclosed by the company on the designated information disclosure platform of the Beijing Stock Exchange (www.bse.cn) on the same day.

2. The voting results of the motion: 9 votes in favor; 0 votes against; 0 abstentions.

This proposal has been reviewed and approved by the Nomination Committee of the company’s second board of directors at the first meeting in 2026, and it was agreed to submit the proposal to the board of directors for review.

3. Avoidance of voting:

This proposal does not involve related transactions and there is no need to avoid voting.

4. Submit the voting status of the shareholders’ meeting:

This proposal does not need to be submitted to the shareholders' meeting for review.

3. Documents for reference

1. "Resolution of the Eighth Meeting of the Second Board of Directors of Shanghai Jiakai Biological Co., Ltd."

2. "Resolution of the First Meeting of the Nomination Committee of the Second Board of Directors of Shanghai Jiakai Biotechnology Co., Ltd. in 2026"

Board of Directors of Shanghai Jiakai Biological Co., Ltd.

September 21, 2026