Suzhou Dongshan Precision Manufacturing Co., Ltd. Semi-Annual Report 2026 August 22, 2026 Section I Important Note, Table of Contents and Definitions The Board of Directors, directors, and senior executives of the Company hereby warrant that the information contained in this Semi-Annual Report is true, accurate and complete without any misrepresentation, misleading statement or material omission, and agree to assume joint and several liabilities for this Semi-Annual Report. YUAN Yonggang, Chairman of the Company, CFO WANG Xu and Accounting Supervisor ZHU Deguang hereby represent that the financial report contained in this Semi-Annual Report is true, accurate and complete. All directors of the Company attended the meeting of the Board of Directors reviewing this Semi-Annual Report. Forward-looking statements such as those on future development plans in this Report do not constitute substantial commitments by the Company to the investors. Investors and relevant persons shall be sufficiently mindful of risks, and understand the differences between plans, predictions and commitments. In this Report, the Company has elaborated relevant potential risk factors and countermeasures, as can be referred to in “X. Risk Exposures to the Company and Countermeasures” under “Section III Management’s Discussion and Analysis”, to which the investors should pay attention. The Company has no plan to pay cash dividends, distribute bonus shares or convert any capital reserve to the share capital. Note: This document is a translated version of the Chinese Semi-Annual Report 2026 (“2026 年半年度报告”). In case of any discrepancies, the Semi-Annual Report 2026 published in the Chinese version shall Table of Contents Section I Important Note, Table of Contents and Definitions......2 Section II Company Profile and Financial Highlights......9 Section III Management’s Discussion and Analysis......12 Section IV Corporate Governance, Environment, and Society......38 Section V Significant Matters......41 Section VI Changes in Shares and Shareholders......51 Section VII Bonds......55 Section VIII Financial Report......56 List of References I. Financial statements signed and chopped by Mr. YUAN Yonggang, legal representative, Mr. WANG Xu, CFO, and Mr. ZHU Deguang, Accounting Supervisor of the Company; II. Originals of all documents of the Company publicly disclosed during the reporting period and related announcements; III. Original of the Semi-Annual Report 2026 stamped with the seal and signed by the legal representative of the Company; and IV. Place for keeping such documents for inspection: Securities Department of the Company at Building 12#, Yunhe Town Headquarters Industrial Park, No. 99 East Taihu Road, Wuzhong District, Suzhou. Definitions Term Means Definition Company, we or means Suzhou Dongshan Precision Manufacturing Co., Ltd. DSBJ Electronic circuit means one of our major business segments, including research and development (R&D), manufacturing and sale of FPCs, rigid PCBs, and rigid-flexible PCBs. Optical transceiver means one of our major business segments, including R&D, manufacturing and sale of optical business transceivers (including optical chips). Photoelectric means one of our major business segments, including R&D, manufacturing and sale of touch panels display module and LCMs. Precision means one of our major business segments, including R&D, manufacturing and sale of precision components metal structural parts and functional components. Hong Kong means HongKong Dongshan Precision Union Opoelectronic Co. Limited, a wholly owned Dongshan subsidiary of the Company. Hong Kong means Hong Kong Dongshan Holdin