Manufacturing of automobile parts and accessories, manufacturing of general parts, mechanical parts and parts processing, manufacturing of motorcycle parts, research and development of automobile parts, sales of mechanical parts and parts, research and development of motorcycles and parts, sales of civil aviation materials, sales of building materials, sales of non-metallic minerals and products, sales of metal ores, sales of high-performance non-ferrous metals and alloy materials, sales of new metal functional materials, sales of CNC machine tools, machine tools Mechanical equipment sales, productive scrap metal recycling, renewable resource recycling (except productive scrap metal), renewable resource processing, renewable resource sales, non-ferrous metal alloy manufacturing, non-ferrous metal alloy sales, metal scrap and chip processing, metal material manufacturing, ferrous metal casting, non-ferrous metal casting, mold sales, special equipment sales, metal product sales, goods import and export, import and export agency, technology import and export.