Doumob — Board/Management Information 2026

Mar 16, 2026

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Doumob

豇盟科技有限公司

(incorporated in the Cayman Islands with limited liability)

(Stock Code: 1917)

CHANGE OF INDEPENDENT NON-EXECUTIVE DIRECTOR AND CHAIRMAN OF THE AUDIT COMMITTEE

RESIGNATION OF INDEPENDENT NON-EXECUTIVE DIRECTOR AND CHAIRMAN OF THE AUDIT COMMITTEE

The board (the "Board") of Directors (the "Director(s)") of Doumob (the "Company") hereby announces that on 15 March 2026, Mr. Chan Yiu Kwong has tendered his resignation as an independent non-executive Director due to other work arrangement and ceased to be the chairman of the audit committee of the Company (the "Audit Committee") with effect from 15 March 2026.

Mr. Chan Yiu Kwong confirmed that he has no disagreement with the Board and there is no other matter in connection with his resignation that needs to be brought to the attention of The Stock Exchange of Hong Kong Limited (the "Stock Exchange") and the shareholders of the Company (the "Shareholders"). The Board would like to take this opportunity to thank Mr. Chan Yiu Kwong for his efforts and valuable contributions to the Company during his tenure of office.

APPOINTMENT OF INDEPENDENT NON-EXECUTIVE DIRECTOR AND CHAIRMAN OF THE AUDIT COMMITTEE

The Board is pleased to announce that Mr. Chen Ning (陳凝) ("Mr. Chen") has been appointed as an independent non-executive Director and the chairman of the Audit Committee with effect from 16 March 2026.

Mr. Chen, aged 45, has been a certified public accountant of China since December 2005 and a senior accountant of China since May 2014. Additionally, he has held the qualification of China certified tax agent since July 2014. In April 2006, he obtained a master's degree in management from Beijing Information Science and Technology University. Since November 2025, Mr. Chen served as an independent non-executive director at i.century Holding Limited, a company listed on the Stock

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Exchange (stock code: 8507). From November 2023 to August 2024, Mr. Chen served as the company secretary and chief financial officer at CHYY Development Group Limited, a company listed on the Stock Exchange (stock code: 8128). From June 2022 to September 2023, he served as an executive director at Beijing Gas Blue Sky Holdings Limited, a company listed on the Stock Exchange (stock code: 6828). Prior to these positions, Mr. Chen had served as the chief financial officer in multiple subsidiaries of an energy enterprise group. Mr. Chen is well-versed in investment and financing, financial management, as well as corporate governance matters.

Mr. Chen has entered into a letter of appointment with the Company commencing from 16 March 2026 for a term of three years, and will continue thereafter until terminated by not less than three months' notice in writing served by either party on the other (subject to re-election as and when required under the memorandum and articles of association of the Company and the Rules Governing the Listing of Securities on the Stock Exchange (the "Listing Rules")). He will be entitled to an annual director's fee of HKD120,000, which was recommended by the remuneration committee of the Company with reference to his background, experience and level of responsibilities to be undertaken with the Company and the prevailing market conditions, and determined by the Board.

As at the date of this announcement, Mr. Chen has confirmed (i) his independence as regards each of the factors referred to in Rules 3.13(1) to (8) of the Listing Rules; (ii) he has no past or present financial or other interests in the business of the Company or its subsidiaries and does not have any connection with any of the Company's core connected persons (as defined in the Listing Rules); and (iii) there are no other factors which might affect his independence. As at the date of this announcement, other than disclosed above, Mr. Chen (i) does not hold any position with the Company and other members of the Group; (ii) does not hold any directorship in any other public companies the securities of which are listed on any securities market in Hong Kong or overseas in the past three years; (iii) does not have any relationships with any Directors, senior management, substantial shareholders or controlling shareholders of the Company; and (iv) does not have any interest in shares of the Company and its associated corporations which is required to be disclosed pursuant to Part XV of the Securities and Futures Ordinance (Chapter 571 of the Laws of Hong Kong). There is no other matter relating to the appointment of Mr. Chen that needs to be brought to the attention of the Shareholders and there is no other information that needs to be disclosed pursuant to Rules 13.51(2)(h) to (v) of the Listing Rule.

The Board expresses its warm welcome to Mr. Chen on joining the Board.

By order of the Board

Doumob

Yang Bin

Chairman

Beijing, the PRC, 16 March 2026

As at the date of this announcement, the executive Directors are Mr. Yang Bin, Mr. Yuan Limin and Ms. Shi Hui; the non-executive Director is Mr. Liu Ailun; and the independent non-executive Directors are Mr. Chen Ning, Mr. Chen Hua and Mr. Zhang Limin.