Ab&B Bio-Tech CO., LTD. JS — Proxy Solicitation & Information Statement 2025

Dec 4, 2025

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.

中慧生物

Ab&B Bio-Tech CO., LTD. JS

江蘇中慧元通生物科技股份有限公司

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

(Stock Code: 2627)

NOTICE OF THE SECOND EXTRAORDINARY GENERAL MEETING OF 2025

Notice is hereby given that the second extraordinary general meeting of 2025 (the "EGM") of Ab&B Bio-Tech CO., LTD. JS (the "Company") will be held at No. 32, Xinglin Road, Medical High-tech Zone, Taizhou, Jiangsu, PRC, on Tuesday, December 23, 2025 at 10 a.m. with attendance and participation both on-site and online via the eVoting Portal, for the purpose of considering and, if thought fit, approving the following resolutions. Unless otherwise defined, capitalized terms used herein shall have the same meanings as those defined in the circular of the Company dated December 4, 2025 (the "Circular").

ORDINARY RESOLUTIONS

1. To consider and approve the appointment of Mr. LI Jianjun as an independent non-executive director of the Company; and
2. To consider and approve the re-appointment of Deloitte Touche Tohmatsu as the auditors of the Company for the year 2025.

By order of the Board

Ab&B Bio-Tech CO., LTD. JS

Mr. AN Youcai

Executive Director, chairman of our Board and general manager

Hong Kong, December 4, 2025

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Notes:

1. The resolution at the meeting will be taken by poll (except where the chairman decides to allow a resolution relating to a procedural or administrative matter to be voted on by a show of hands) pursuant to the articles of association of the Company and the Listing Rules. The results of the poll will be published on the websites of Hong Kong Exchanges at www.hkexnews.hk and Clearing Limited and the Company at www.abbbio.com in accordance with the Listing Rules.

2. Shareholders may attend the EGM (or any adjournment thereof) online through the eVoting Portal using the personalized login credentials provided by the Company's share registrar, Tricor Investor Services Limited, by post. Shareholders attending the EGM through the eVoting Portal will be able to vote and submit questions relevant to the proposed resolution online. Shareholders participating in the EGM virtually will also be counted towards the quorum. For beneficial owners or non-registered Shareholders whose Shares are held in the Central Clearing and Settlement System (CCASS) through banks, brokers, custodians or HKSCC Nominees Limited who wish to virtually attend the EGM, vote and submit questions relevant to the proposed resolution online, they should (i) contact and instruct their banks, brokers, custodians or HKSCC Nominees Limited that they want to attend the EGM, vote and submit questions online; and (ii) provide their email address to their banks, brokers, custodians or HKSCC Nominees Limited before the time limit required by the relevant banks, brokers, custodians or HKSCC Nominees Limited for the necessary arrangements and the personalized login credentials will be sent to the email address provided by the banks, brokers, custodians or HKSCC Nominees Limited.

3. For the purpose of determining the list of Shareholders who are entitled to attend the EGM, the register of members of the Company will be closed from December 18, 2025 to December 23, 2025, both days inclusive, during which period no transfer of Shares will be registered. In order to be eligible to attend and vote at the EGM, holders of the H shares whose transfers have not been registered shall deposit all transfer documents accompanied by the relevant share certificates at the Company's H share registrar, Tricor Investor Services Limited, at 17/F, Far East Finance Centre, 16 Harcourt Road, Hong Kong for registration not later than 4:30 p.m. on Wednesday, December 17, 2025 (Hong Kong time) for registration.

4. Shareholders whose names appear on the company's register of members on Thursday, December 18, 2025 are entitled to attend the EGM and vote thereat.

5. A shareholder entitled to attend and vote at the EGM may appoint one or more proxies to attend and vote on his behalf. A proxy need not be a shareholder of the Company. Where a shareholder appoints more than one proxy, his proxies can only vote on a poll.

6. The instrument appointing a proxy must be in writing under the hand of a shareholder or his attorney duly authorized. If the shareholder is a corporation, that instrument must be either under its common seal or under the hand of its director(s) or duly authorized attorney(ies). If that instrument is signed by an attorney of a shareholder, the power of attorney or other document authorizing that attorney to sign must be notarized.

7. In order to be valid, the form of proxy together with the notarized power of attorney or other authorization document (if any) must be deposited at the H share registrar of the Company, Tricor Investor Services Limited, at 17/F, Far East Finance Centre, 16 Harcourt Road, Hong Kong not less than 24 hours before the time fixed for the meeting (i.e. not later than 10 a.m. on Monday, December 22, 2025 (Hong Kong time)).

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1. A vote given in accordance with the terms of an instrument of proxy shall be valid notwithstanding the death or loss of capacity of the appointer, or the revocation of the proxy or of the authority under which the form of proxy was signed, or the transfer of shares in respect of which the proxy is given, provided that no notice in writing of these matters shall have been received by the Company prior to the commencement of the EGM.

2. Where there are joint registered holders of any share, any one of such joint holders may vote, either in person or by proxy, in respect of such share as if he/she was solely entitled thereto, but if more than one of such joint holders are present at the EGM, whether in person or by proxy, the joint registered holder present whose name stands first on the register of members of the Company in respect of the shares shall alone be entitled to vote in respect thereof.

3. Shareholders or their proxies shall produce their identification documents for inspection when attending the EGM.

4. The EGM is expected to last for no more than half a business day. Shareholders and proxies attending the meeting on-site shall be responsible for their own travel and accommodation expenses.

5. Contact information of the meeting:
   Contact Person: XIA Tingting
   Telephone: (0523) 8220 5786
   Email: sd@abbbio.com.cn
   Address: No. 32, Xinglin Road, Medical High-tech Zone, Taizhou, Jiangsu, PRC

As at the date of this notice, the Board comprises: (i) Mr. AN Youcai, Ms. LI Runxiang and Mr. HE Yiming as executive Directors; (ii) Mr. CHENG Qianwen, Mr. YU Jianlin and Mr. DU Mu as non-executive Directors; and (iii) Mr. LI Xiangming, Ms. LI Xiaoqing and Mr. CHEN Chengbei as independent non-executive Directors.

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