Steelmaking, ironmaking, coking and by-products, steel rolling, mechanical processing and repair, cement manufacturing, mining, gas production, aluminum-plastic composite pipe production, mechanical equipment leasing; Road general cargo transport; Road freight transport (including dangerous goods); Sales of metal materials, mineral products, coke fines, limestone, chemical products (excluding dangerous chemicals), and coal; Loading and unloading services; Investment and management of early childhood education; The following businesses are operated by branches: Sales of auto parts, engineering machinery parts, auto decoration supplies, hardware and electrical products, rubber products, tires, lubricating oil, lubricating grease, refractory materials, and insulation materials; Operation of docks and other port facilities, cargo loading, unloading, lightering, and warehousing services within port areas, leasing of port machinery, facilities, and equipment; Production of oxygen, nitrogen, and chlorine (operating within the scope of the license); Production of medical oxygen; Freight transport information consulting services; Design, production, and publication of domestic advertisements; Export of self-produced metallurgical products, coking, refractory, and chemical by-products, mineral products, and metallurgical machinery; Import of raw materials, auxiliary materials, mechanical equipment, instruments, meters, and parts needed for production and research; Contracting of overseas steel industry projects and domestic international bidding projects, export of equipment and materials required for the above overseas projects; Greening and cleaning services, house and storefront leasing, parking services in residential areas; Special equipment inspection and testing services; Inspection and testing services; Production of food additives; Metallurgical material testing; Metallurgical product testing; Disposal of waste materials (excluding hazardous waste); Heat production and supply; Licensed items: Mobile pressure vessel/gas cylinder filling; Basic telecommunications services.