Wison Engineering Services Co. Ltd. — Proxy Solicitation & Information Statement 2026

Apr 24, 2026

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.

WISON ENGINEERING SERVICES CO. LTD.

惠生工程技術服務有限公司

(Incorporated in the Cayman Islands with limited liability)

(Stock Code: 2236)

NOTICE OF ANNUAL GENERAL MEETING

NOTICE IS HEREBY GIVEN that the annual general meeting (the “AGM”) of Wilson Engineering Services Co. Ltd. (the “Company”) will be held on Friday, 5 June 2026 at 10:00 a.m. at 633 Zhongke Road, Zhangjiang Hi-Tech Park, Pudong New Area, Shanghai, PRC for the purposes of considering and, if thought fit, passing (with or without amendments) the following resolutions:

ORDINARY RESOLUTIONS

1. To receive and consider the audited financial statements and the reports of the directors (the “Director(s)”) and the auditors (the “Auditors”) of the Company and its subsidiaries for the year ended 31 December 2025.

2. (a) To re-elect Mr. Zhou Hongliang as an executive Director;

(b) To re-elect Prof. Shi Donghui as an independent non-executive Director;

(c) To re-elect Prof. Dong Jing as an independent non-executive Director; and

(d) To authorize the board of directors of the Company (the “Board”) to determine the Directors’ remuneration.

1. To re-appoint Messrs. Ernst & Young as the Auditors and to authorize the Board to fix their remuneration.

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To consider, and if thought fit, to pass with or without amendments, the following resolutions as ordinary resolutions of the Company:

1. “THAT:

(a) subject to paragraph (b) below, the exercise by the Directors during the Relevant Period of all the powers of the Company to purchase shares of HK$0.10 each in the capital of the Company (the “Shares”) be and is hereby generally and unconditionally approved;

(b) the total number of Shares which may be purchased on The Stock Exchange of Hong Kong Limited or any other stock exchange on which securities of the Company may be listed and which is recognized for this purpose by the Securities and Futures Commission of Hong Kong and The Stock Exchange of Hong Kong Limited pursuant to the approval in paragraph (a) above shall not exceed or represent more than 10 per cent. of the total number of issued Shares at the date of passing this Resolution, and the said approval shall be limited accordingly;

for the purpose of this Resolution “Relevant Period” means the period from the passing of this Resolution until whichever is the earliest of:

(i) the conclusion of the next annual general meeting of the Company; or

(ii) the expiration of the period within which the next annual general meeting of the Company is required by the articles of association of the Company (the “Articles”) or any applicable law to be held; or

(iii) the revocation or variation of the authority given under this Resolution by ordinary resolution of the shareholders of the Company in general meeting.”

1. “THAT a general mandate be and is hereby unconditionally given to the Directors to exercise full powers of the Company to allot, issue and deal with additional shares in the Company (including the making and granting of offers, agreements and options which might require shares to be allotted, whether during the continuance of such mandate or thereafter) provided that, otherwise than pursuant to (i) a rights issue where shares are offered to shareholders on a fixed record date in proportion to their then holdings of shares; (ii) an issue of shares pursuant to the exercise of rights of subscription or conversion under the terms of any existing warrants, bonds, debentures, notes or other securities which carry rights to subscribe for or are convertible into shares of the Company; (iii) the exercise of options granted under any share option scheme adopted by the Company; or (iv) any scrip dividend or similar arrangement

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providing for the allotment of shares in lieu of the whole or part of a dividend in accordance with the Articles, the total number of issued Shares shall not exceed the aggregate of:

(a) 20 per cent. of the total number of issued Shares as at the date of the passing of this resolution, plus

(b) (if the Directors are so authorized by a separate ordinary resolution of the shareholders of the Company) the number of Shares repurchased by the Company subsequent to the passing of this Resolution (up to a maximum equivalent to 10 per cent. of the total number of issued Shares as at the date of the passing of ordinary resolution no. 6).

Such mandate shall expire at the earliest of:

(i) the conclusion of the next annual general meeting of the Company; or

(ii) the expiration of the period within which the next annual general meeting of the Company is required by the Articles or any applicable law to be held; or

(iii) the date of any revocation or variation of the mandate given under this resolution by ordinary resolution of the shareholders of the Company at a general meeting."

1. "THAT subject to ordinary resolutions nos. 4 and 5 being duly passed, the general mandate granted to the Directors to exercise the powers of the Company to allot, issue and deal with additional shares in the Company pursuant to ordinary resolution no. 5 be and is hereby extended by the addition thereto of an amount representing the total number of issued Shares repurchased by the Company under the authority granted pursuant to ordinary resolution no. 4, provided that such extended amount shall not exceed 10 per cent. of the total number of issued Shares as at the date of the passing of this resolution."

By Order of the Board

Wison Engineering Services Co. Ltd.

Zhou Hongliang

Executive Director, Chairman and Chief Executive Officer

Hong Kong, 24 April 2026

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Notes:

(1) All resolutions (except for resolutions which relate purely to procedural and administrative matters) at the AGM will be taken by poll pursuant to the Listing Rules and the results of the poll will be published on the websites of the Stock Exchange and the Company in accordance with the Listing Rules.

(2) Any member of the Company entitled to attend and vote at the AGM is entitled to appoint another person as his proxy to attend and vote instead of him. A member who is the holder of two or more shares may appoint more than one proxy to represent him and vote on his behalf at the AGM. A proxy needs not be a shareholder of the Company. Every member present in person or by proxy shall on a poll be entitled to one vote for each share held by him.

(3) In order to be valid, the form of proxy, together with the power of attorney or other authority (if any) under which it is signed or a certified copy thereof, must be lodged by post or by hand with the Company's branch share registrar, Computershare Hong Kong Investor Services Limited ("Computershare"), at 17M Floor, Hopewell Centre, 183 Queen's Road East, Wan Chai, Hong Kong not less than 48 hours before the time appointed for the AGM (i.e. not later than 10:00 a.m. on Wednesday, 3 June 2026) or any adjournment or postponement thereof.

(4) Delivery of an instrument appointing a proxy should not preclude a member from attending and voting in person at the AGM and in such event, the instrument appointing a proxy shall be deemed to be revoked.

(5) Where there are joint holders of any Shares, any one of such joint holders may vote at the AGM, either in person or by proxy, in respect of such Share as if he were solely entitled thereto, but if more than one of such joint holders be present at the AGM, the vote of the senior who tenders a vote, whether in person or by proxy, shall be accepted to the exclusion of the votes of the other joint holders, and for this purpose, seniority shall be determined by the order in which the names stand in the register of members of the Company in respect of the joint holding.

(6) The register of members of the Company will be closed from Tuesday, 2 June 2026 to Friday, 5 June 2026 (both days inclusive), during which period no transfer of shares of the Company will be effected. In order to determine the identity of members who are entitled to attend and vote at the AGM to be held on Friday, 5 June 2026 at 10:00 a.m., all transfer documents accompanied by the relevant share certificates must be lodged with the Company's branch share registrar in Hong Kong, Computershare, at Shops 1712-1716, 17th Floor, Hopewell Centre, 183 Queen's Road East, Wan Chai, Hong Kong not later than 4:30 p.m. on Monday, 1 June 2026.

As at the date of this announcement, the executive Directors of the Company are Mr. Zhou Hongliang (Chairman of the Board), Mr. Zheng Shifeng and Mr. Li Dun; the nonexecutive Director of the Company is Mr. Liu Hongjun; and the independent non-executive Directors of the Company are Mr. Lawrence Lee, Mr. Feng Guohua, Ms. Guo Ruqian, Prof. Shi Donghui and Prof. Dong Jing.