Manufacturing of road motor vehicles; design of special equipment; manufacturing of special equipment; inspection and testing of special equipment. General items: manufacturing of specialized equipment (excluding licensed specialized equipment); repair of specialized equipment; manufacturing of containers; sales of containers; repair of containers; manufacturing of agricultural machinery; sales of agricultural machinery; agricultural machinery services; manufacturing of specialized machinery for agriculture, forestry, animal husbandry, and fishery; installation and repair of specialized machinery for agriculture, forestry, animal husbandry, and fishery; manufacturing of environmental protection specialized equipment; sales of environmental protection specialized equipment; manufacturing of domestic waste treatment equipment; manufacturing of mining machinery; sales of mining machinery; manufacturing of metal tools; sales of metal tools; research and development of mechanical equipment; sales of mechanical equipment; manufacturing of automotive parts and accessories; wholesale of automotive parts and accessories; retail of automotive parts and accessories; sales of automobiles; sales of new energy vehicles; repair and maintenance of motor vehicles; research and development of new materials; manufacturing of refrigeration and air conditioning equipment; sales of refrigeration and air conditioning equipment; sales of special equipment; sales of vending machines; leasing of mechanical equipment; recycling of renewable resources (excluding production scrap metal); sales of renewable resources; recycling of production scrap metal; leasing of construction machinery and equipment; import and export of goods; import and export of technologies; technical services, technical development, technical consulting, technical exchange, technical transfer, and technical promotion.