The registered address of u. S. A. Is located on the south-eastern level of the building at the bridge between the port and the smart road in hoidong county, hoidong city, anhui province. The registration authority is the fatung county market supervisory authority, represented by a legal person, and operates on general items: construction of metal structures; sale of metal structures; sale of plastic products; sale of hard-core items; sale of construction materials; manufacture of moulds; sale of moulds; development of mechanical equipment; sale of mechanical equipment; sale of doors and windows; manufacture of general-purpose equipment (excluding special equipment); manufacture of industrial robots; installation, maintenance of industrial robots; sale of industrial robots (in addition to authorized business, autonomous operation of legally prohibited or restricted projects)