Manufacturing of refrigeration and air conditioning equipment; Manufacturing of general equipment (excluding special equipment); Installation services for general mechanical equipment; Manufacturing of auto parts and accessories; Repair of electrical equipment; Installation and repair of specialized machinery for agriculture, forestry, animal husbandry, and fisheries; Sales of agricultural machinery; Manufacturing of specialized equipment for feed production; Sales of specialized equipment for feed production; Automobile sales; Wholesale of auto parts; Remanufacturing of auto parts; Retail of auto parts; Research and development of auto parts; Tire sales; Engineering and technological research and experimental development; Sales of special equipment; Manufacturing of pumps and vacuum equipment; Sales of pumps and vacuum equipment; Information consulting services (excluding those requiring licensing); Sales of mechanical and electrical equipment; Research and development of new materials; Research and development of mechanical equipment; Repair of specialized equipment; Technical services, technology development, technical consulting, technical exchange, technology transfer, technology promotion; Repair of general equipment; Manufacturing of livestock machinery; Sales of livestock machinery; Sales of refrigeration and air conditioning equipment; Manufacturing of specialized equipment (excluding those requiring licensing); Technology, information, facility construction, and operation services related to agricultural production; Information technology consulting services; IoT application services; Sales of mechanical equipment; Import and export of goods; Intelligent agricultural management; Sales of specialized machinery for agriculture, forestry, animal husbandry, and fisheries; Manufacturing of specialized equipment for food, beverages, alcohol, and tea production; Sales of mechanical parts and components; IoT technical services; Manufacturing of metal structures; Motor vehicle repair and maintenance; Recycling of scrapped agricultural machinery; Dismantling of scrapped agricultural machinery. Licensed items: Road motor vehicle production; Power supply business.