CHANGE OF INDEPENDENT NON-EXECUTIVE DIRECTOR ANDCOMPOSITION OF BOARD COMMITTEES

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.DENOX ENVIRONMENTAL & TECHNOLOGY HOLDINGS LIMITED (Incorporated in the Cayman Islands with limited liability) (Stock Code: 1452) CHANGE OF INDEPENDENT NON-EXECUTIVE DIRECTOR AND COMPOSITION OF BOARD COMMITTEES The Board wishes to announce that with effect from 28 June 2024: 1. Mr. Li Min has resigned as an independent non-executive Director and ceased to be the chairman of the Remuneration Committee and a member of each of the Audit Committee and Nomination Committee; and 2. Dr. Wang Xueqian has been appointed as an independent non-executive Director the chairman of the Remuneration Committee and a member of each of the Audit Committee and Nomination Committee.RESIGNATION OF INDEPENDENT NON-EXECUTIVE DIRECTOR The board (the “Board”) of directors (the “Directors”) of Denox Environmental & Technology Holdings Limited (the “Company”) hereby announces that Mr. Li Min (“Mr. Li”) has resigned as an independent non-executive Director with effect from 28 June 2024 as Mr. Li would like to devote more time to his other business commitments.Mr. Li has confirmed that he has no disagreement with the Board and there are no other matters in relation to his resignation that need to be brought to the attention of the shareholders of the company (the “Shareholders”) and The Stock Exchange of Hong Kong Limited (the “Stock Exchange”).The Board would like to express its sincere gratitude to Mr. Li for his valuable contributions to the Board during his tenure of service as an independent non-executive Director.- 1 -APPOINTMENT OF INDEPENDENT NON-EXECUTIVE DIRECTOR The Board is pleased to announce that Dr. Wang Xueqian (王学谦) (“Dr. Wang”) has been appointed as an independent non-executive Director with effect from 28 June 2024.The biographical details of Dr. Wang are set out below: Dr. Wang aged 48 has extensive experience in the field of environmental engineering particularly in areas of waste gas purification resource utilization and metallurgical solid waste management as well as in leading and directing impactful research projects. He is currently a professor and doctoral supervisor at the School of Environmental Science and Engineering Kunming University of Science and Technology* (昆明理工大学环境科学与工程学院). He was appointed as a “Changjiang Scholar” by the Ministry of Education of the People’s Republic of China* (中华人民共和国教育部) in 2023 and named as a “Yunling Scholar” supported by the Yunnan Provincial Talented Person Plan* (云南 省兴滇英才计划) in 2022. He has also been identified as a young and middle-aged academic and technical leader in Yunnan Province* (云南省中青年学术和技术带头人) in 2020.Dr. Wang focuses his research on the purification and resource utilization of metallurgical and chemical waste gases as well as the disposal and resource utilization of metallurgical solid waste. He has led more than 30 research projects including National 863 Program projects* (国家863计划课 题) National Key R&D Program projects* (国家重点研发计划课题) National Natural Science Foundation of China projects* (国家自然科学基金) Provincial and Ministerial-level scientific research projects* (省部级科研项目) and enterprise-commissioned projects* (企业委托项目). Dr.Wang has published over 150 papers with more than 60 papers published as first or corresponding author in SCI-indexed journals. He has also published 1 monograph obtained 62 authorized invention patents (including 3 international patents) and is the first inventor on 35 China invention patents. Dr.Wang received 1 National Technology Invention Award (Second Class) (国家技术发明二等奖) and 11 provincial and ministerial-level First-Class Awards (省部级一等奖) for his research achievements. Dr. Wang also participated in the development of 4 national and group standards* (国家和团体标准).Dr. Wang’s research achievements have been widely applied in various industries achieving significant social and economic benefits and promoting the green low-carbon and sustainable development of the metallurgical and chemical industries in China.Dr. Wang obtained a bachelor’s degree in environmental engineering from China University of Mining and Technology* (中国矿业大学环境工程专业) in 1998 a master’s degree in environmental engineering from Kunming University of Science and Technology* (昆明理工大学) in 2001 and a doctorate degree in environmental engineering from Kunming University of Science and Technology* (昆明理工大学) in 2007.- 2 -Dr. Wang has entered into a letter of appointment with the Company in relation to his appointment as an independent non-executive Director for a term of 3 years commencing from 28 June 2024. He is subject to retirement by rotation and re-election at the next general meeting of the Company after his appointment and thereafter subject to retirement by rotation at least once every three years in accordance with the articles of association of the Company. Under the letter of appointment either party may terminate at any time by giving the other not less than three month’s notice in writing.Pursuant to the letter of appointment Dr. Wang is entitled to receive a fixed Directors’ fee of RMB96000 annually which was determined by the Board and will be reviewed at least annually bythe Board based on the recommendation of the remuneration committee (the “RemunerationCommittee”) of the Board taking into account of his experience knowledge qualifications duties and responsibilities within the Company as well as the Company’s performance and the prevailing market conditions.As at the date of this announcement Dr. Wang does not have and is not deemed to have any interests in the shares underlying shares or debentures of the Company or any of its associated corporations within the meaning of Part XV of the Securities and Futures Ordinance (Chapter 571 of the Laws of Hong Kong).Save as disclosed above as at the date of this announcement Dr. Wang has not held any directorships in other public companies the securities of which are listed on any stock exchange in Hong Kong or overseas in the last three years does not hold other major appointments and professional qualifications does not have any relationship with any Directors senior management substantial or controlling Shareholders and does not hold any other positions with the Company or any of its subsidiaries.Dr. Wang has confirmed that he meets the independence guidelines set out in Rule 3.13 of the Rules Governing the Listing of Securities (the “Listing Rules”) on the Stock Exchange.Save as disclosed above there is no other information that is required to be disclosed pursuant to the requirements of Rules 13.51(2)(h) to (v) of the Listing Rules and there are no other matters relating to the appointment of Dr. Wang that need to be brought to the attention of the Shareholders or the Stock Exchange.The Board would like to take this opportunity to welcome Dr. Wang in joining the Board.CHANGES IN COMPOSITION OF BOARD COMMITTEES The Board further announces that following the resignation of Mr. Li as an independent non- executive Director he also ceased to be the chairman of the Remuneration Committee and a member of each of the audit committee (the “Audit Committee”) and the nomination committee (the “Nomination Committee”) of the Board with effect from 28 June 2024.- 3 -Dr. Wang has been appointed as the chairman of the Remuneration Committee and a member of each of the Audit Committee and the Nomination Committee with effect from 28 June 2024.By Order of the Board Denox Environmental & Technology Holdings Limited Zhao Shu Chairlady Hong Kong 28 June 2024 As at the date of this announcement the Board comprises Ms. Zhao Shu and Mr. Li Ke as executive Directors; Mr. Li Xingwu as non-executive Director; and Ms. Chan Yeuk Wa Dr. Wang Xueqian and Mr. Ong Chor Wei as independent non-executive Directors.* for identification purposes only