Sales of coal and products; coking; sales of fertilizers; production of chemical products (excluding licensed chemical products); sales of chemical products (excluding licensed chemical products); manufacturing of industrial textile products; import and export of goods; import and export of technology; metal surface treatment and heat treatment; sewage treatment and its reuse; coal washing; processing of mechanical parts and components; repair of general equipment; repair of specialized equipment; repair and maintenance of motor vehicles; repair of electrical equipment; repair of communication equipment; repair of instruments and meters; repair and maintenance of computers and office equipment; maintenance of electronic and mechanical equipment (excluding special equipment); railway transport auxiliary activities; socio-economic consulting services; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; investment activities with自有 funds; enterprise management consulting; business training (excluding educational training, vocational skills training, and other training requiring permits); conference and exhibition services; leasing of land use rights; leasing of non-residential real estate; leasing services (excluding licensed leasing services); leasing of housing; road freight transport of general cargo vehicles with a total mass of 4.5 tons or less (excluding network freight and dangerous goods). Licensed items: Production of hazardous chemicals; production of fertilizers; import and export of goods under state trade management; installation, modification, and repair of special equipment; construction engineering construction; specialized construction operations; accommodation services [branch operations]; catering services [branch operations]; road freight transport (excluding dangerous goods); power generation, transmission, and supply (distribution) business.