Research and development of mechanical equipment; manufacturing of general equipment (excluding special equipment manufacturing); manufacturing of metal processing machinery; processing of mechanical parts and components; sales of mechanical equipment; manufacturing of molds; sales of molds; research and development of hardware products; manufacturing of hardware products; wholesale of hardware products; sales of metal products; road freight transportation of general cargo vehicles with a total mass of 4.5 tons or less (excluding network freight and dangerous goods); technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; import and export of goods.