Technical services, technology development, technical consultation, technical exchange, technology transfer, technology promotion; General equipment manufacturing (excluding special equipment manufacturing); Machining and parts processing of mechanical parts; Manufacturing of automotive parts and accessories; Road freight transport for ordinary vehicles with a total mass of 4.5 tons or less (excluding online freight and dangerous goods); General equipment repair; Special equipment repair; Research and development of mechanical equipment; Sales of mechanical equipment; Sales of mechanical parts and components; Retail of automotive parts; Wholesale of automotive parts; Information technology consulting services; Information consulting services (excluding licensed information consulting services); Sales of metal materials; General cargo warehousing services (excluding hazardous chemicals and other items requiring permits); Sales of packaging materials and products; Import and export of goods; Import and export of technology; Import and export agency.