Manufacture of bearings; sales of bearings; research and development of mechanical equipment; sales of mechanical equipment; research and development of automotive parts; manufacture of automotive parts and accessories; wholesale of automotive parts; retail of automotive parts; manufacture of mechanical and electrical equipment; sales of mechanical and electrical equipment; processing of mechanical parts and components; sales of mechanical parts and components; manufacture of general parts; manufacture of high-performance fibers and composite materials; research and development of new material technologies; manufacture of servo control mechanisms; manufacture of navigation aids and related devices; manufacture of intelligent basic manufacturing equipment; manufacture of metal structures; manufacture of high-speed railway equipment and accessories; sales of high-speed precision heavy-load bearings; manufacture of railway locomotive and rolling stock parts; sales of specialized equipment, key systems, and components for rail transit; manufacture of urban rail transit equipment; manufacture of metal materials; sales of metal materials; leasing of non-residential real estate; leasing of mechanical equipment. Licensed items: design and production of civil aircraft parts; production of civil aircraft (engines, propellers); inspection and testing services.