The business scope includes: General projects: Manufacturing of refrigeration and air conditioning equipment; Sales of refrigeration and air conditioning equipment; Fan and fan manufacturing; Sales of fans and blowers; General equipment manufacturing (excluding special equipment manufacturing); Manufacturing of ordinary valves and plugs (excluding special equipment manufacturing); Sales of valves and plugs; Manufacturing of specialized equipment for environmental protection; Sales of specialized equipment for environmental protection; Sales of mechanical equipment; Motor manufacturing; Manufacturing of electric dynamometer motors; Sales of electric dynamometer motors; Sales of distribution switch control equipment; Sales of metal materials; Retail of hardware products; Sales of insulation materials; Manufacturing of insulation and soundproofing materials; Sales of insulation and soundproofing materials; Manufacturing of metal products for safety and firefighting purposes; Sales of electrical equipment; Manufacturing of architectural decoration, plumbing components, and other metal products for building use; Sales of glass fiber reinforced plastic products; Sales of metal products; General equipment repair.