According to enterprise data, Ke Sheng Building Materials Co., Ltd. in Zhangdian, Shanxi Province was established on 20 16-05- 18, and its business scope includes research and development, production and sales: desulfurization limestone powder, quicklime, quicklime powder, hydrated lime, fly ash, kaolin, briquette, stone, asbestos, thermal insulation materials and raw materials, and commercial concrete. Sales: environmental protection materials, urea, chemical products (excluding dangerous chemicals and inflammable and explosive drugs), building materials and installation materials; Mechanical and electrical equipment maintenance, repair, overhaul, technical consultation and operation management services; Comprehensive utilization of fly ash, slag and gypsum; Design and construction of trench filling and land reclamation projects; Unit logistics management services and cleaning services; Road transport of ordinary goods (notice: enterprises independently choose business projects and carry out business activities according to law; Projects that must be approved according to law shall, after being approved by the relevant departments, carry out business activities in accordance with the approved contents; Shall not engage in business activities of projects prohibited and restricted by industrial policies) (projects that are subject to approval according to law can only be carried out after approval by relevant departments)