Auto parts and accessories manufacturing; mold manufacturing; mold sales; mechanical equipment sales; mechanical equipment research and development; import and export of goods; technology import and export; import and export agency; sales of metal matrix composites and ceramic matrix composites; manufacturing of high-performance fibers and composite materials; sales of high-performance fibers and composite materials; research and development of automobile parts; sales of mechanical parts and components; manufacturing of general parts; research and development of motorcycles and parts; wholesale of automobile parts; retail of automobile parts; sales of metal materials.