Announcement on Completion of Industrial and Commercial Registration of Subsidiary

Beijing DangSheng Materials Technology Co., Ltd. Announcement on Completion of Industrial and Commercial Registration of Subsidiary Stock Code: 300073 Stock Abbreviation: DangSheng Technology Announcement No.: 2026-031 Beijing DangSheng Materials Technology Co., Ltd. Announcement on Completion of Industrial and Commercial Registration of Subsidiary The Company and all members of the Board of Directors guarantee the content of the information disclosure is true, accurate, and complete, and that there are no false records, misleading statements, or major omissions. On April 15, 2026, Beijing DangSheng Materials Technology Co., Ltd. (hereinafter referred to as the "Company") convened the 22nd meeting of the 6th Board of Directors, which reviewed and approved the "Proposal on the Acquisition of You Tian Technology Equity and Investment in the Construction of a 150,000 Ton/Year Lithium Iron Phosphate Project" and the "Proposal on the Acquisition of Juneng New Material Equity and Investment in the Construction of a 200,000 Ton/Year Iron Phosphate Project." The Company agreed to acquire 51% equity of Yunnan Tianyou New Energy Technology Co., Ltd. (hereinafter referred to as "Tianyou Technology") held by Zhejiang Youshan New Materials Technology Co., Ltd. and 49% equity of Yunnan Yuneng New Materials Co., Ltd. (hereinafter referred to as "Yuneng New Materials") using its own funds or funds raised. For details, please refer to the relevant announcement disclosed by the Company on Juchao Information Network (www.cninfo.com.cn) on April 16, 2026. Recently, Tianyou Technology and Yuneng New Materials have completed the industrial and commercial registration of the equity transfer and obtained the renewed "Business L