HONGCHENG ENVIRONMENTAL TECHNOLOGY COMPANY LIMITED 鴻承環保科技有限公司 (Incorporated in the Cayman Islands with limited liability) (於開曼群島註冊成立的有限公司) (Stock Code 股份代號：2265) NOTIFICATION LETTER 通知信函 30 September 2025 Dear Non-registered Shareholder(s) (Note 1), The English and Chinese versions of the Company's Current Corporate Communications are available on the Company's website at www.sdhcgroup.cn and the website of The Stock Exchange of Hong Kong Limited (the "Stock Exchange") at www.hkexnews.hk respectively (the " ...