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.CM Hi-Tech Cleanroom Limited捷芯隆高科洁净系统有限公司 (Incorporated in the Cayman Islands with members’ limited liability) (Stock Code: 2115) VOLUNTARY ANNOUNCEMENT BUSINESS UPDATE This is an announcement made by CM Hi-Tech Cleanroom Limited (the ‘‘Company’’ together with its subsidiaries the ‘‘Group’’) on a voluntary basis to inform the shareholders of the Company (the ‘‘Shareholders’’) and potential investors about the latest business update of the Group.The board (the ‘‘Board’’) of directors (the ‘‘Directors’’) of the Company is pleased to announce that in May 2024 Channel Systems Asia Sdn Bhd an indirect wholly-owned subsidiary of the Company received two purchase orders with an aggregate value of approximately US$8.0 million (the ‘‘Purchase Orders’’) to supply cleanroom wall and ceiling systems for the construction of a semiconductor facility in India (the ‘‘Project’’).The Purchase Orders were received from (1) one of the Group’s existing customers which is principally engaged in the design development and manufacture of products and equipment for cleanroom interiors (‘‘Customer A’’); and (2) a new customer of the Group which is a leading manufacturer of cleanroom products in India (‘‘Customer B’’).Based on the latest discussions with Customer A and Customer B the Group currently expects to complete the supply of cleanroom wall and ceiling systems by March 2025.The Purchase Orders represent a notable milestone for the Group in securing a larger presence within the Indian market highlighting the Group’s enhanced brand reputation and increased industry competitiveness. The Board attributes the receipt of the Purchase Orders to the Group’s proven track record of delivering high-quality cleanroom products for Customer A’s previous projects and the robust business relationships established over time and the increased brand recognition in the Indian market. As part of its strategy the Group will continue to foster strong long-term relationships with its customers and enhance brand recognition across different markets.– 1 –The Board wishes to state that the final order amount and total revenue is subject to completion supply of all products as stated in the Purchase Orders and may be different to those stated in this announcement as a result of unpredictable factors such as variation orders changes in design or overall construction progress of the Project. No forecast or prediction of the profits of the Group has been made with regard to the Purchase Orders in this announcement. To the best of the Director’s knowledge information and belief having made all reasonable enquiries Customer A Customer B and their respective ultimate beneficial owners are third parties independent of the Company and its connected persons.Shareholders and potential investors of the Company are advised to exercise caution when dealing in the shares of the Company.By Order of the Board CM Hi-Tech Cleanroom Limited Ng Yew Sum Chairman and Executive Director Hong Kong 27 June 2024 As at the date of this announcement the Board comprises: (1) Mr. NG Yew Sum (Chairman) Mr. CHIN Sze Kee and Mr. LAW Eng Hock as the executive Directors; and (2) Mr. NG Seng Leong Mr. Martin Giles MANEN and Mr. WU Chun Sing as the independent non-executive Directors.–2–