General items: Mechanical equipment sales; Mechanical equipment leasing; Sales of special equipment; Special equipment rental; General mechanical equipment installation services; Agricultural machinery sales; Agricultural machinery leasing; Agricultural machinery services; Sales of mechanical parts and spare parts; Sales of agricultural, forestry, animal husbandry and fishery machinery parts; Sales of construction machinery; Construction machinery and equipment leasing; Mechanical and electrical equipment sales; Fishery machinery sales; Animal husbandry machinery sales; Sales of metal products; Sales of metal tools; Electrical equipment sales; Office equipment sales; Retail of computer software and hardware and auxiliary equipment; Fire equipment sales; Wholesale of sporting goods and equipment; Sales of special equipment for environmental protection; Forestry machinery service; Wholesale of hardware products; Sales of daily necessities; Sales of building materials; Sales of building decoration materials; Building block sales; Sales of light building materials; Sales of building waterproofing membrane products; Engineering management services; Leasing services (excluding licensed leasing services); Internet sales (except for the sale of licensed goods) (except for licensed business, you can independently operate projects that are not prohibited or restricted by laws and regulations)