Wholesale and retail of construction machinery, construction machinery, lifting machinery, wire and cable, high and low voltage electrical appliances, lighting fixtures, plumbing equipment, fire fighting equipment, water pump, steel, steel structural parts, welding equipment, building decoration materials; Self-run or agent import and export business of all kinds of commodities and technologies (except commodities and technologies that are restricted by the state or prohibited from import and export). (For projects subject to approval according to law, business activities can only be carried out after approval by relevant departments)