General equipment manufacturing (excluding special equipment manufacturing); general parts manufacturing; mold manufacturing; mold sales; sales of air transportation equipment; sales of civil aviation materials; technical services, technology development, technical consultation, technology exchange, technology transfer, and technology promotion; mechanical equipment leasing; manufacturing of machine tool functional parts and accessories; machine tool functional parts and accessories Sales of parts; manufacturing of steam turbines and auxiliary machinery; sales of steam turbines and auxiliary machinery; research and development of auto parts; manufacturing of auto parts and accessories; retail of auto parts; sales of new energy vehicle production and testing equipment; research and development of motorcycles and parts; manufacturing of motorcycle parts; retail of motorcycles and parts; manufacturing of refrigeration and air-conditioning equipment; sales of refrigeration and air-conditioning equipment ; Manufacturing of electronic components; Sales of electronic products; Manufacturing of new energy prime mover equipment; Sales of new energy vehicle electrical accessories; Sales of new energy prime mover equipment; Research and development of energy recovery systems; Manufacturing of bearings, gears and transmission parts; Sales of high-speed precision gear transmission devices; Sales of bearings, gears and transmission parts; Sales of high-speed precision heavy-duty bearings; Computer software and hardware Manufacturing of components and peripheral equipment; retail of computer software, hardware and auxiliary equipment; research and development of marine engineering equipment; manufacturing of marine energy systems and equipment; sales of marine energy systems and equipment; development of artificial intelligence basic software; development of artificial intelligence application software; artificial intelligence industry application system integration services; manufacturing of intelligent vehicle-mounted equipment; and sales of intelligent basic manufacturing equipment. Licensed projects: design and production of civil aircraft parts; manufacturing of aerospace equipment; maintenance of civil aircraft; training of civil aviation maintenance personnel.