PROPOSED CHANGE OF AUDITORS

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.(A joint stock company incorporated in the People’s Republic of China with limited liability) (Stock Code: 2402) PROPOSED CHANGE OF AUDITORS This announcement is made by Beijing SinoHytec Co. Ltd. (the “Company”) pursuant to Rule 13.51(4) of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited (the “Hong Kong Listing Rules”).RETIREMENT OF AUDITORS The Company was notified by its auditors Da Hua Certified Public Accountants (Special General Partnership) (“Da Hua”) that Da Hua has been suspended from engaging in securities service business for a term of six months from May 10 2024 by the Jiangsu Regulatory Bureau of China Securities Regulatory Commission in relation to Da Hua’s work not related to the Company. For the sake of prudence and after discussion with Da Hua the board of directors (the “Board”) of the Company hereby announces that Da Hua will retire as the Company’s auditors with effect from the conclusion of the forthcoming annual general meeting of the Company (the “AGM”).Da Hua has confirmed in writing that there are no matters in relation to its retirement that need to be brought to the attention of the shareholders of the Company (the “Shareholders”). The Board and the audit committee of the Board (the “Audit Committee”) have confirmed that there is no disagreement or unresolved issue between the Company and Da Hua and there are no other matters regarding the proposed change of auditors that need to be brought to the attention of the Shareholders.PROPOSED APPOINTMENT OF AUDITORS With the recommendation of the Audit Committee the Board has proposed the appointment of BDO China Shu Lun Pan Certified Public Accountants LLP (“BDO”) as the auditors of the Company for the year ending December 31 2024 with the term of office commencing from the date of approval of Shareholders at the AGM until the conclusion of the next annual general meeting of the Company.– 1 –The Audit Committee has considered a number of factors when recommending BDO as the new auditors of the Company to the Board including (i) its experience in providing audit services for companies listed on The Stock Exchange of Hong Kong Limited and The Shanghai Stock Exchange Science and Technology Innovation Board (the “SSE STAR Market”) its industry knowledge technical competence and its familiarity with the requirements of the Hong Kong Listing Rules the Listing Rules of SSE STAR Market and the PRC Accounting Standards for Business Enterprises; (ii) its resources and capability including manpower and time; (iii) its independence objectivity and integrity; (iv) its audit fee; (v) its investor protection capability; and (vi) the guidelines issued by the Accounting and Financial Reporting Council.An ordinary resolution will be proposed at the AGM to appoint BDO as the new auditors of the Company. A circular containing among other things details of such proposed appointment together with the notice convening the AGM will be published in due course.By order of the Board Beijing SinoHytec Co. Ltd.ZHANG Guoqiang Chairman of the Board Beijing the PRC June 7 2024 As of the date of this announcement the Board comprises Mr. Zhang Guoqiang Ms. Song Haiying and Ms. Dai Dongzhe as executive Directors; Ms. Teng Renjie and Mr. Song Feng as non-executive Directors; and Mr. Liu Xiaoshi Mr. Ji Xuehong Mr. Chan So Kuen and Mr. Li Zhijie as independent non-executive Directors.–2–