Announcement of Public Inquiry and Transaction Results of Combustible and Toxic Gas Detector by Donghua Engineering Technology Co., Ltd. 1. Project Information Procurement Project Number: TZ2024005-D1-I503-I056 Procurement Project Name: Combustible and Toxic Gas Detector Section (Package) Number: TZ2024005-D1-I503-I056/01 Section (Package) Name: Combustible and Toxic Gas Detector Section Package 012 Transaction Results Supplier: Hanwei Technology Group Co., Ltd. 3. Contact Information Purchaser: Donghua Engineering Technology Co., Ltd. Address: No. 70 Wangjiang East Road, Baohe District, Hefei City, Anhui Province Postal Code: 230000 Contact Person: Yang Xiaomeng Phone: 055163627125 Email: yangxiaomeng@chinaecec.com Donghua Engineering Technology Co., Ltd. May 20, 2025