Hebei Yinwang Energy saving Technology Co., Ltd. is registered in Liuyanma Village, Zangtun Town, Dacheng County, Langfang City, Hebei Province. The registration authority is the Market Supervision Administration of Dacheng County, Langfang City, and the legal representative is Hao Dongxu. The business scope includes general projects such as technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Manufacturing of high-performance fibers and composite materials; Sales of high-performance fibers and composite materials; Production of fireproof sealing materials; Sales of fireproof sealing materials; Manufacturing of insulation and soundproofing materials; Sales of insulation and soundproofing materials; Manufacturing of lightweight building materials; Sales of lightweight building materials; Manufacturing of asbestos products; Sales of asbestos products; Rubber product manufacturing; Sales of rubber products; Manufacturing of graphite and carbon products; Sales of graphite and carbon products; Manufacturing of plastic products; Sales of plastic products; Manufacturing of cement products; Sales of cement products; Manufacturing of building waterproofing membrane products; Sales of building waterproofing membrane products; Manufacturing of ecological environment materials; Sales of ecological environment materials; Manufacturing of sealing fillers; Sales of sealing fillers; Production of refractory materials; Sales of refractory materials; Sales of coatings (excluding hazardous chemicals); Manufacturing of hardware products; Retail of hardware products; Manufacturing of daily wooden products; Sales of daily wooden products; Sales of building materials; Sales of building decoration materials; Sales of metal materials; Sales of lighting fixtures; Sales of insulation materials; Sales of non-metallic minerals and products; Sales of metal products; Sales of anti-corrosion materials; Sales of synthetic materials; Import and export of goods; Technology import and export; Labor services (excluding labor dispatch). (Except for projects that require approval according to law, business activities can be carried out independently based on the business license in accordance with the law) Licensed project: construction project construction; Construction labor subcontracting; Professional construction work. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments. The specific business projects shall be subject to the approval documents or licenses issued by the relevant departments.)