Announcement on Holding the 2025 Annual Performance Online Briefing

Stock Code: 002204 Stock Abbreviation: Dalian Heavy Industry Announcement No.: 2026-020 Dalian Heavy Industry Group Co., Ltd. Announcement on Holding the 2025 Annual Performance Online Briefing The Company and all members of the Board of Directors guarantee that the information disclosed is true, accurate, and complete, and that there are no false records, misleading statements, or material omissions. Dalian Heavy Industry Group Co., Ltd. (hereinafter referred to as the "Company") disclosed the full text and summary of the "2025 Annual Report" on the Juchao Information Network (www.cninfo.com.cn) on April 17, 2026. To facilitate investors' in-depth and comprehensive understanding of the Company's situation, the Company has scheduled the 2025 Annual Performance Online Briefing for April 24, 2026 (Friday) from 15:00 to 17:00 on the All-China Stock Network. This annual performance briefing will be conducted via remote network access. Investors can log in to the All-China Stock Network's "Investor Relations Interactive Platform" (https://ir.p5w.net) to participate in this annual performance briefing. The attendees of this annual performance briefing will include: Mr. Meng Wei, Chairman and Chief Executive Officer (CEO) of the Company; Mr. Lu Chaobang, Director, Senior Vice President, Chief Financial Officer (CFO), and Secretary of the Board; and Ms. Tang Ruiming, Independent Director and Chairman of the Audit and Compliance Management Committee. To fully respect investors and enhance the targeted nature of communication, we are now soliciting questions from investors in advance of the Company's 2025 Annual Performance Online Briefing to widely gather investors' opinions and suggestions. Investors can visit http://ir.p5w.net/zj/ before the online performance briefing or scan the QR code below to access the dedicated page for question collection. The Company will answer questions of common concern to investors during the 2025 Annual Performance Briefing. We welcome investors to actively participate in this online briefing. [Image: QR code for question collection] Special Announcement Dalian Heavy Industry Group Co., Ltd. Board of Directors April 21, 2026