Hebei also had a registered address in the western part of the village of grand lutang, four townships of the city of poikou, hebei province. The registered body is the market supervision authority of the city of poo, and its legal representatives are choi ko yi. They operate in the areas of shock relief, dust removal equipment and accessories, valves, electric tools, car spare parts, mechanical equipment and accessories, hydraulic equipment and accessories, construction machinery and accessories, hardware pressurization, voltage machines and accessories, electrical equipment and spare parts, machine-bed equipment and accessories, construction, sale, repair and maintenance; quantage, hardware, electrical powder, pipe, wire, steel (without barbed steel, mouthlight) and rubber products; mechanical processing, spring processing** (subject to legal approval, business activities may be carried out with the approval of the relevant department)