Technical services, technical development, technical consulting, technical exchange, technical transfer, and technical promotion; Manufacturing of bearings; Sales of bearings; Research and development of new material technologies; Promotion services for new material technologies; Sales of bearings, gears, and transmission components; Manufacturing of bearings, gears, and transmission components; Sales of high-performance fibers and composite materials; Manufacturing of high-performance fibers and composite materials; Sales of metal matrix composites and ceramic matrix composites; Manufacturing of engineering plastics and synthetic resins; Sales of engineering plastics and synthetic resins; Retail of hardware products; Manufacturing of hardware products; Wholesale of hardware products; Retail of electronic components; Wholesale of electronic components; Manufacturing of specialized equipment (excluding licensed specialized equipment manufacturing); Sales of mechanical equipment; Metal cutting processing services; Sales of non-ferrous metal alloys; Sales of metal materials; Development of artificial intelligence application software; System integration services for artificial intelligence industries; General application systems for artificial intelligence; Leasing of non-residential real estate; Import and export of goods; Road freight transport of general cargo vehicles with a total mass of 4.5 tons and below (excluding network freight and dangerous goods).