Manufacture of civil aviation equipment (metal ceramic sheets and steel brake disc pairs, etc.); production processes for rail vehicle brake pads, automotive brake pads, brake disc components, etc.; engaged in aircraft component repair and special operations (limited to branch operations); manufacture of railway locomotive and rolling stock parts, automotive parts and accessories, carbon fiber reinforced composite products, forgings and powder metallurgy products; processing of mechanical parts; manufacture of civil aircraft components, high-performance fibers and composites (limited to branch operations); sale of metal materials, non-metal materials, civil aviation equipment, high-performance fibers and composites, mechanical equipment, electronic products; product design; technology development, technology transfer, technical services, technical consulting, technical exchange, technology promotion; import and export of goods, technology import and export; agency import and export.