Sinoma International Environmental Engineering Co., Ltd. (hereinafter referred to as "SIEE") was established in 2010 with a registered capital of RMB 350 million. It is a wholly-owned subsidiary of Sinoma International under CNBM Group and a high-tech enterprise in Beijing. The company is mainly engaged in the preparation, sales and O&M of alternative fuels, the disposal of solid waste such as MSW, industrial waste, HW, industrial sludge, and contaminated soil, and its resource utilization. SIEE is an alternative fuel supplier, environmental engineering technology provider, EPC contractor, concession investor and O&M service provider.

The company adheres to the development concept of "innovating environmental governance technology and creating corporate social value", seizes the green ecological market, and deeply cultivates the road of energy conservation and carbon reduction, and has contracted more than 200 projects of sewage treatment, drinking water treatment, municipal water supply and drainage pipeline network, comprehensive treatment of water environment, environmental protection projects such as solid waste disposal, and seawater desalination and resource utilization projects. It has also deployed alternative fuel supply business in more than 50 cities across the country, with an alternative fuel supply capacity of more than 2 million tons/year, a hazardous waste management license capacity of 327,000 tons/year, and a contaminated soil disposal capacity of 500,000 tons/year. It has edited and participated in the editing of more than 10 national standards and industry standards, and has more than 90 invention and utility model patents; it has successively won the Green Design International Award, the Ministry of Industry and Information Technology's Green Manufacturing System Solution Supplier, the National Quality Investment Project Award, the Building Materials Industry Science and Technology Progress Award, China's Top 100 Building Materials Service Industry, and China's Top 10 Cement Kiln Collaborative Solid Waste Disposal Enterprises.