Livestock machinery manufacturing; agricultural machinery manufacturing; specialized machinery manufacturing for agriculture, forestry, animal husbandry, sideline production, and fishery; machining of mechanical parts and components; hardware product manufacturing; metal structure manufacturing; general parts manufacturing; plastic product manufacturing; metal chains and other metal product manufacturing; metal daily-use product manufacturing; automotive parts and accessories manufacturing; spray coating processing; mechanical and electrical equipment manufacturing; mechanical and electrical equipment research and development; material handling equipment manufacturing; general feeding and distribution device manufacturing; general equipment manufacturing (excluding special equipment manufacturing); specialized equipment manufacturing for feed production; forging and powder metallurgy product manufacturing; industrial robot manufacturing; handcart and livestock traction vehicle manufacturing; mold sales; environmental protection specialized equipment manufacturing; installation and maintenance of specialized machinery for agriculture, forestry, animal husbandry, sideline production, and fishery; agricultural, forestry, animal husbandry, and fishery machinery parts manufacturing; construction metal accessory manufacturing; electronic and mechanical equipment maintenance (excluding special equipment); specialized equipment repair; agricultural machinery sales; livestock machinery sales; mechanical equipment sales; mechanical equipment leasing; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; goods import and export; technology import and export; import and export agency.