Resignation of Chief Executive Officer

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.CHIHO ENVIRONMENTAL GROUP LIMITED齐合环保集团有限公司 (Incorporated in the Cayman Islands with limited liability) (Stock Code: 976) RESIGNATION OF CHIEF EXECUTIVE OFFICER The board (the “Board”) of directors (the “Directors”) of Chiho Environmental Group Limited (the “Company” together with its subsidiaries collectively the “Group”) hereby announces that Mr. Zhang Wei (“Mr. Zhang”) has tendered his resignation as the chief executive officer (the “Chief ExecutiveOfficer”) of the Company with effect from 25 June 2024 due to the need to spend more time on his other personal commitments.Mr. Zhang has confirmed that he has no disagreement with the Board and there is no matter in relation to his resignation that needs to be brought to the attention of the shareholders of the Company or The Stock Exchange of Hong Kong Limited (the “Stock Exchange”).The Group is in the process of identifying a suitable candidate to fill the vacancy of the Chief Executive Officer. The Group will make further announcement in this regard as and when appropriate and in accordance with the requirements under the Rules Governing the Listing of Securities on the Stock Exchange.The Board would like to take this opportunity to express its gratitude to Mr. Zhang for his contribution to the Group during his tenure of office.By Order of the Board Chiho Environmental Group Limited Qin Yongming Chairman Hong Kong 25 June 2024 As at the date of this announcement the Board comprises: Executive Directors: Mr. Tu Jianhua Mr. Qin Yongming (Chairman) Mr. Miao Yu Mr. Yao Jietian Mr. Wang Li Mr. Liu Yongxin Independent Non-Executive Directors: Prof. Li Zhiguo Mr. Szeto Yuk Ting