Ferrous metal casting; metal processing machinery manufacturing; non-ferrous metal casting; production of molding materials for casting; sales of molding materials for casting; manufacturing of metal parts for construction; research and development of automobile parts; manufacturing of automobile parts and accessories; mechanical parts and parts processing; sales of mechanical parts and parts; manufacturing of general parts; retail of automobile parts; manufacturing of generators and generator sets; sales of generators and generator sets; research and development of motorcycles and parts; manufacturing of motorcycle parts; manufacturing of agricultural machinery; sales of agricultural machinery; manufacturing of machinery for construction engineering; sales of machinery for construction engineering; containers Maintenance; container manufacturing; container sales; general equipment manufacturing (excluding special equipment manufacturing); general equipment repair; sales of labor protection supplies; non-residential real estate leasing; park management services; sales of machinery and equipment; sales of metal accessories for construction; sales of renewable resources; processing of renewable resources; recycling of productive scrap metal; manufacturing of gas compression machinery; sales of gas compression machinery; business training (excluding education training, vocational skills training and other training that require a license); business management consulting; technical services, technology development, technical consulting, technical exchanges, technology transfer, and technology promotion.