Housing construction, Civil Engineering Construction, Building Installation, Architectural decoration, Provide construction equipment services, Construction of environmental protection facilities, Engineering fence loading and unloading construction; Monitoring system engineering installation services; Non-metallic minerals and products, Metals and metal ores, building materials, electrical equipment, Hardware, Furniture and interior decoration materials sales; Recycling and wholesale of recycled materials; Construction machinery and equipment, Railway transportation equipment, Office equipment rental; Loading and unloading services; Sales of coal and its products; Sales of non-hazardous chemical products and non-hazardous chemical raw materials; Import and export of goods or technology。( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments。)