Production of Class II medical devices; production of medical masks General projects: technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; research and development of automobile parts; research and development of metal products; research and development of motorcycles and parts; software development; manufacturing of motorcycle parts and accessories; manufacturing of automobile parts and accessories; general equipment manufacturing (excluding special equipment manufacturing); general parts manufacturing; mold manufacturing; mold sales; sales of mechanical parts and parts; sales of metal materials; sales of metal products; sales of non-ferrous metal alloys; manufacturing of metal cutting and welding equipment; metal cutting Cutting and welding equipment sales; metal cutting processing services; intelligent unmanned aerial vehicle manufacturing; intelligent unmanned aerial vehicle sales; air transportation equipment sales; artificial intelligence application software development; information system integration services; artificial intelligence industry application system integration services; radar and supporting equipment manufacturing; steam turbine and auxiliary equipment manufacturing; import and export of goods; technology import and export; import and export agency; production of daily masks (non-medical); sales of second-class medical devices; wholesale of medical masks; sales of daily masks (non-medical); wholesale of protective equipment for medical staff