Operation of state-owned assets authorized by the state; smelting and rolling processing of ferrous metals; mining of mineral products; smelting and processing of non-metallic mineral products; production of electricity and building materials; sales of metal ores; acquisition and sales of productive scrap metal; manufacturing of machinery and equipment, processing of machinery spare parts; supply and marketing of materials; railway transportation of enterprise-owned vehicles and trucks (only for steel); metal products, pellets, timber, agricultural and sideline products Transportation of chemicals, fertilizers and pesticides; labor export services; scientific research, design and development services; information technology services; warehousing services, loading and unloading services; self-owned real estate and equipment leasing services; product quality testing and inspection (subject to projects recognized by the China National Accreditation Service for Conformity Assessment) and consulting services; sales of automation control, microcomputers and electronic equipment; self-operated import and export trade. Business scope of branches: production and sales of coke, ammonium sulfate, coal gas, crude (light) benzene, naphthalene, coal tar pitch, sulfuric acid, and coal tar; hotels and large restaurants, real estate maintenance; central heating, property services, water heating and electricity installation and maintenance, sanitation, Real estate services; sales of coal, hardware and building materials, mechanical and electrical products; sales of motorcycles and accessories; wholesale and retail of telephones and accessories, chemical products, flowers, seedlings, department stores, grain, oil and products, non-staple food, and daily necessities; electrical appliance repair; livestock and poultry breeding.