Sales of high-performance fibers and composite materials; sales of green composite materials for rail transit; sales of metal matrix composites and ceramic matrix composites; research and development of carbon fiber recycling technologies; sales of civil aviation materials; manufacturing of graphite and carbon products; manufacturing of deep-sea oil drilling equipment; manufacturing of specialized equipment for oil drilling; manufacturing of automotive parts and accessories; retail of automotive parts; retail of hardware products; manufacturing of rubber products; manufacturing of molds; sales of molds; manufacturing of railway locomotive and rolling stock parts; manufacturing of aerospace equipment; technical services, technology development, technical consultation, technology exchange, technology transfer, and technology promotion; sales of engineering plastics and synthetic resins; engineering and technological research and experimental development; manufacturing of synthetic materials (excluding hazardous chemicals); manufacturing of glass fiber reinforced plastic products. Licensed items: technology import and export; import and export agency; import and export of goods.