Manufacturing of gears, gear reducers, and gearboxes; sales of gears, gear reducers, and gearboxes; sales of bearings, gears, and transmission components; sales of high-speed precision gear transmission devices; sales of mechanical equipment; import and export of goods; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; leasing of non-residential real estate; road freight transport for ordinary cargo vehicles with a total mass of 4.5 tons or less (excluding online freight and dangerous goods).