General items: Manufacturing of automotive parts and accessories; Wholesale of automotive parts; Sales of automobiles; Sales of new energy vehicles; Sales of special equipment; Sales of mechanical equipment; Retail of hardware products; Research and development of emerging energy technologies; Research and development of marine engineering equipment; Research and development of intelligent robots; Research and development of mechanical equipment; Research and development of metal products; Research and development of automotive parts; Manufacturing of marine engineering equipment; Manufacturing of specialized equipment (excluding licensed specialized equipment); Manufacturing of specialized machinery for tunnel construction; Manufacturing of construction engineering machinery; Manufacturing of material handling equipment; Manufacturing of general parts; Sales of intelligent port loading and unloading equipment; Sales of intelligent material handling equipment; Sales of marine engineering equipment; Sales of mechanical and electrical equipment; Sales of specialized equipment for oil drilling; Sales of rail transit engineering machinery and parts; Sales of specialized machinery for tunnel construction; Sales of railway transport equipment; Sales of mining machinery; Sales of environmental protection special equipment; Sales of environmental emergency technical equipment; Leasing services (excluding licensed leasing services); Leasing of mechanical equipment; Leasing of construction machinery and equipment; Leasing of special equipment; Loading and unloading services; Installation services for general mechanical equipment; Repair of general equipment; Repair of specialized equipment; Motor vehicle repair and maintenance; Technical services, development, consulting, exchange, transfer, and promotion; Information consulting services (excluding licensed information consulting services); Import and export of goods. Licensed items: Production of road motor vehicles; Manufacturing of special equipment.