Motor vehicle inspection and testing services; Road motor vehicle production; Installation, modification, and repair of special equipment; Design of special equipment; Inspection and testing of special equipment; Manufacturing of special equipment; Urban domestic waste operational services; Road freight transport (excluding dangerous goods). General items: Import and export of goods; Import and export of technology; Research and development of mechanical equipment; Manufacturing of specialized machinery for agriculture, forestry, animal husbandry, and fisheries; Manufacturing of domestic waste treatment equipment; Manufacturing of environmental protection special equipment; Manufacturing of general equipment (excluding special equipment); Manufacturing of auto parts and accessories; Manufacturing of general parts; Manufacturing of plastic packaging boxes and containers; Manufacturing of metal packaging containers and materials; Manufacturing of hardware products; Spray coating processing; Processing of renewable resources; Recycling of productive scrap metal; Sales of renewable resources; Recycling of renewable resources (excluding productive scrap metal); Sales of environmental protection special equipment; Sales of mechanical equipment; Sales of new energy vehicles; Sales of agricultural machinery; Sales of special equipment; Sales of mechanical parts and components; Processing of mechanical parts and components; Sales of IoT equipment; Development of intelligent robots; Development of artificial intelligence application software; General artificial intelligence application systems; Information system integration services; Research and development of auto parts; Repair of general equipment; Repair of special equipment; Motor vehicle repair and maintenance; Leasing of land use rights; Housing leasing; Non-residential real estate leasing; Metal cutting processing services; Sales of metal products; Automobile sales.