Development, design, manufacturing, processing, sales, repair and after-sales service of automobile bodies, axles, trucks, television broadcasting vehicles, motorhomes, semi-trailers, steel tank semi-trailers, vehicle-mounted steel tanks, steel storage tanks, aluminum tank semi-trailers, vehicle-mounted aluminum tanks, pressure vessels (Class A2, Type III pressure vessels; Class C2, road tank vehicles; Class C3, tank containers), special gas cylinders (limited to cryogenic insulated gas cylinders), ordinary tank vehicles, pressure tank vehicles, atmospheric pressure dangerous goods tank vehicles, non-ferrous metal products, solar photovoltaic accessories, photovoltaic combiner boxes, mechanical equipment, mechanical parking equipment, intelligent equipment, special-purpose vehicles (including shelters, kitchen vehicles, spraying vehicles, shower vehicles), molds and accessories; automobile modification; sales of automobiles and parts, metal materials, building materials, electromechanical products, chemical products (excluding hazardous chemicals and Category I non-pharmaceutical precursor chemicals), agricultural machinery products, rubber products, daily necessities, office equipment, communication and broadcasting equipment (excluding wireless transmission devices and ground satellite receiving equipment), iron ore, pellets, fuel oil (flash point >61°C), heavy oil (excluding finished oil and hazardous chemicals, subject to national regulations on quota license management and special management); design, integration and installation of computer information systems; import and export of goods and technologies. (The above business items do not include those restricted, prohibited or requiring prior approval by the state; items requiring licensing shall be operated only after obtaining relevant department approval.)