The registration authority is the market supervision authority of the uiang district of the city of xian, represented by the legal person joe jiangbo, and operates on general items: sale of metal products; sale of non-ferrous metal alloys; sale of metal chains and other metal products; sale of metal structures; repair of metal products; maintenance of transport facilities; and safety system monitoring services. (in addition to projects subject to authorization under the law, the operation of the business is carried out autonomously under a licence)