The registration authority is the liang creek department of data, represented by a legal person, and covers general items: sale of metal materials; sale of metal products; sale of construction materials; wholesale distribution of hardware products; sale of mechanical parts, parts and components; sale of electrical machinery and equipment; sale of daily supplies; sale of household appliances; sale of rubber products; wholesale distribution of spare parts for cars; sale of machine beds; sale of goods for daily use; import and export of goods; import and export of technology; import and export agents (in addition to legally authorized projects)