TransThera Sciences (Nanjing), Inc. — Proxy Solicitation & Information Statement 2026

May 22, 2026

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this notice, 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 notice.

TransThera Sciences (Nanjing), Inc.

藥捷安康（南京）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: 2617)

NOTICE OF THE EXTRAORDINARY GENERAL MEETING

NOTICE IS HEREBY GIVEN THAT the extraordinary general meeting (the “EGM”) of TransThera Sciences (Nanjing), Inc. (the “Company”) will be held online via the Vistra eVoting Portal on Thursday, 18 June 2026 at 9:00 a.m. for considering and, if thought fit, passing, the following resolutions:

BY WAY OF A SPECIAL RESOLUTION:

1. In relation to the H Share Award Scheme:
   1.1 To consider and approve the H Share Award Scheme;
   1.2 To consider and approve the Scheme Mandate Limit; and
   1.3 To consider and approve the authorization to the Scheme Administrator to deal with matters related to the H Share Award Scheme.

BY WAY OF AN ORDINARY RESOLUTION:

1. To consider and approve the Service Provider Sublimit, subject to the adoption of the H Share Award Scheme.

By order of the Board
TransThera Sciences (Nanjing), Inc.
藥捷安康(南京)科技股份有限公司
Dr. Frank Wu
Chairman and Chief Executive Officer

22 May 2026

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Notes:

(1) Pursuant to Rule 13.39(4) of the Listing Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited, votes of the shareholder(s) at the EGM shall be taken by poll.

(2) Any shareholder of the Company (the “Shareholder(s)”) entitled to attend and vote at the EGM is entitled to appoint one or more proxies to attend and vote on his/her/its behalf at the EGM. A proxy need not be a Shareholder. Shareholders shall have one vote for each share that they hold.

(3) In order to determine the holders of H shares of the Company (the “H Share(s)”) who are entitled to attend and vote at the EGM, the H Share register of members of the Company shall be closed from Monday, 15 June 2026 to Thursday, 18 June 2026 (both days inclusive), during which no transfer of H Shares will be registered. Holders of H Shares and Unlisted Shares whose names appear on the register of members on Thursday, 18 June 2026 are entitled to attend the EGM. All transfers accompanied by the relevant certificates must be lodged with the Company’s H share registrar in Hong Kong, Tricor Investor Services Limited at 17/F, Far East Finance Centre, 16 Harcourt Road, Wanchai, Hong Kong for registration not later than 4:30 p.m. on Friday, June 12, 2026.

Holders of Unlisted Shares who intend to attend the EGM are required to lodge all completed transfer documents accompanied by the relevant share certificates at the office of the Company, at 3rd Floor, 9th Building, Accelerator Phase 2 of Biotech and Pharmaceutical Valley, Jiangbei New Area, Nanjing, Jiangsu Province on or before 4:30 p.m. on Friday, 12 June 2026 for registration.

(4) The instruments appointing a proxy must be in writing under the hand of the Shareholder or his/her attorney duly authorized in writing. If the Shareholder is a corporation, that instrument must be either under the company seal or under the hand of its director or duly authorized attorney. If that instrument is signed by an attorney of the Shareholder, the power of attorney authorizing that attorney to sign or other authorization documents must be notarized.

(5) The proxy form together with the power of attorney or other authorization document (if any) must be deposited at the H Share Registrar, Tricor Investor Services Limited, at 17/F, Far East Finance Centre, 16 Harcourt Road, Hong Kong (for H Shareholders) or the Company’s head office in the PRC at 3rd Floor, 9th Building, Accelerator Phase 2 of Biotech and Pharmaceutical Valley, Jiangbei New Area, Nanjing, Jiangsu Province (for Domestic Shareholders), not less than 24 hours before (i.e. 17 June 2026 09:00 a.m.) the time fixed for holding the EGM or any adjournment thereof (as the case may be).

Completion and return of the form of proxy will not preclude Shareholders from attending and voting via Vistra eVoting Portal at the meeting or any adjourned meeting should such Shareholders so wish.

(6) All times refer to Hong Kong local time, except as otherwise stated.

As at the date of this notice, the Board comprises: (i) Dr. Frank Wu and Mr. Wu Di as executive directors; (ii) Ms. Jia Zhongxin as a non-executive director; and (iii) Mr. Li Shu Pai, Ms. Chui Hoi Yam and Ms. Zheng Zhelan as independent non-executive directors.