The registration authority is the data office for the city of xie-choushan, with legal representatives, and operates on general items: sale of metal materials; sale of metal products; sale of mechanical equipment; sale of high-quality special steel materials; sale of metal chains and other metal products; sale of special equipment; sale of steel bars for construction; sale of metal structures; sale of construction materials; sale of light construction materials; sale of construction accessories for construction; sale of metal ropes and their products; sale of non-ferrous metal alloys; sale of non-metal mines and products; sale of building decoration materials; sale of building blocks; sale of electrical equipment; sale of office equipment; sale of labour protection supplies; wholesale production of pentafin products; sale of electrical cables; sale of electronic products; sale of axes; retail sale of computer hardware and assistive equipment; sale of chemical products (other than licensed chemical products); sale of plastics; sale of plastics; sale of rubber products; extension of new materials; export and import of goods; export and import of hardware, except for licensing activities, subject to the law