Announcement on the Grandchild Company Obtaining High-Tech Enterprise Certificate

Stock Code: 002331 Stock Abbreviation: Wantong Technology Announcement No.: 2026-027 Anhui Wantong Technology Co., Ltd. Announcement on the Grandchild Company Obtaining High-Tech Enterprise Certificate The Company and the entire Board of Directors guarantee that the information disclosed is true, accurate, and complete, without any false records, misleading statements, or significant omissions. Anhui Wantong Technology Co., Ltd. (hereinafter referred to as the "Company")'s controlled grandchild company, Zhongtong Shenghua (Shandong) Testing Group Co., Ltd. (hereinafter referred to as "Zhongtong Shenghua"), recently received a "High-Tech Enterprise Certificate" jointly issued by the Shandong Provincial Department of Science and Technology, Shandong Provincial Department of Industry and Information Technology, Shandong Provincial Department of Finance, and the Shandong Provincial Tax Service of the State Administration of Taxation. The certificate number is GR202537005932, the issuance date is December 8, 2025, and it is valid for three years. According to relevant regulations, Zhongtong Shenghua can enjoy the national preferential policies for high-tech enterprises for three consecutive years from the date of obtaining the high-tech enterprise certification (2025, 2026, and 2027), and will pay corporate income tax at a rate of 15%. This tax preferential policy does not affect the financial data of the company's previously disclosed operating performance. Hereby announced. Anhui Wantong Technology Co., Ltd. Board of Directors April 23, 2026