NOTICE OF 2024 SECOND H SHARE CLASS MEETING

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. (A joint stock company incorporated in the People’s Republic of China with limited liability) (Stock Code: 2402) NOTICE OF 2024 SECOND H SHARE CLASS MEETINGNOTICE IS HEREBY GIVEN that the 2024 second H Share Class Meeting (the “H ShareClass Meeting”) of Beijing SinoHytec Co. Ltd. (the “Company”) will be held at 2:00 p.m.on Friday June 28 2024 at Room C701 7th Floor Block C Building B-6 Dongsheng Science Park Zhongguancun No. 66 Xixiaokou Road Haidian District Beijing China (or immediately after the annual general meeting of the Company and the 2024 second A Share class meeting of the Company to be convened and held on the same date and at the same place) to consider and if thought fit approve the following resolution: SPECIAL RESOLUTION 1. To consider and approve the profit distribution and capital reserve capitalization plan of the Company for the year of 2023 the proposed change of registered capital and amendments to the articles of association of the Company.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 notice the board of directors of the Company 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 Mr. Liu Xiaoshi Mr. Ji Xuehong Mr. Chan So Kuen and Mr. Li Zhijie as independent non-executive directors.– 1 –Notes: 1. Pursuant to the Rule 13.39(4) of the Rules Governing the Listing of Securities (the “Listing Rules”) on The Stock Exchange of Hong Kong Limited (the “Stock Exchange”) voting on all resolutions at a general meeting shall be by way of poll. The poll results of the H Share Class Meeting will be published on the websites of the Stock Exchange (www.hkexnews.hk) and the Company (www.sinohytec.com) in accordance with the requirements of the Listing Rules. For the avoidance of doubt holders of treasury shares of the Company if any shall abstain from voting at the H Share Class Meeting. 2. The record date for determining the entitlement of the shareholders of the Company (the “Shareholders”) to attend and vote at the H Share Class Meeting will be at 4:30 p.m. on Friday June 7 2024. For the purpose of determining the entitlement of the Shareholders to attend and vote at the H Share Class Meeting all properly completed transfer forms accompanied by the relevant share certificates must be lodged for registration with the H share registrar of the Company Tricor Investor Services Limited at 17/F Far East Finance Centre 16 Harcourt Road Hong Kong (for H Shareholders) no later than 4:30 p.m. on Friday June 7 2024. For the avoidance of doubt any person(s) who become Shareholder(s) after 4:30 p.m. Friday June 7 2024 will not be entitled to attend and vote at the H Share Class Meeting. 3. Any Shareholder who is entitled to attend and vote at the H Share Class Meeting may appoint one or more proxies to attend and vote on his/her behalf. A proxy needs not be a Shareholder. If the Shareholder appoints more than one proxy his/her proxies may only vote by poll. 4. The instrument appointing a proxy shall be in writing under the hand of the appointor or his/her attorney duly authorized in writing. If the Shareholder is a legal entity then the relevant appointing document must be either under seal or under the hand of its director or attorney duly authorized. If the instrument appointing a proxy is signed by a person duly authorized by the Shareholder the powers of attorney or other instruments of authorization shall be notarized. For H Shareholders the aforementioned documents must be lodged with the H share registrar of the Company Tricor Investor Services Limited at 17/F Far East Finance Centre 16 Harcourt Road Hong Kong as soon as possible but in any event by not later than 24 hours before the time fixed for holding of the H Share Class Meeting (i.e. not later than 2:00 p.m. on Thursday June 27 2024) or any adjournment or postponement thereof. Completion and return of the form(s) of proxy shall not preclude you from attending and voting in person at the H Share Class Meeting or any adjourned or postponed meeting(s) if you so wish. 5. Shareholders shall produce their identification documents when attending the H Share Class Meeting. 6. If a proxy attends the H Share Class Meeting on behalf of a Shareholder he/she should produce his/her identification document and the power of attorney or other documents signed by the appointer or his/her attorney which specifies the date of its issuance. If a representative of a corporate Shareholder attends the H Share Class Meeting such representative shall produce his/her identification document and the notarized copy of the resolution passed by the board of directors or other authority or notarized copy of any authorization documents issued by such corporate Shareholder.– 2 –7. The H share registrar of the Company in Hong Kong is Tricor Investor Services Limited and its address and contact information are as follows: 17/F Far East Finance Centre 16 Harcourt Road Hong Kong Email: is-enquiries@hk.tricorglobal.com Tel: (852) 2980 1333 Fax: (852) 2810 8185 8. The address and contact information of the office of the Board located at the registered office of the Company in the PRC are as follows: Room C701 7th Floor Block C Building B-6 Dongsheng Science Park Zhongguancun No. 66 Xixiaokou Road Haidian District Beijing China Contact person: Kang Zhi (康智) Tel: +86 10 62927176 Email: sinohytec@autoht.com 9. Pursuant to the articles of association of the Company in respect of any joint Shareholder of any share of the Company only the joint Shareholders whose name stands first in the register of Shareholders has the rights to receive this notice or other document of the Company and any notice given to such person shall be deemed to have been given to all joint Shareholders in respect of the shares. Any of the joint Shareholders may sign the form of proxy but if more than one joint Shareholder is present in person or by proxy a vote by the joint Shareholder in priority whether in person or by proxy shall be accepted as the sole vote on behalf of the remaining joint Shareholders. For this purpose the order of precedence of the joint Shareholders shall be determined by the rank of such joint Shareholders in the register of Shareholders in relation to the shares concerned.–3–