Sales of abrasive tools, hardware tools, mechanical equipment, fireproof materials, locomotive accessories, sanitary ware, power electronic components, bridge frames, busbars, switchgear, metal materials, instrument pipes and valves, rubber and plastic products, building decoration materials, clothing, shoes and hats, clocks and lighting equipment; Self operated and agency import and export business of various commodities and technologies. (Excluding goods and technologies restricted or prohibited from import and export by the state). Luggage sales; Sales of Class I medical devices; Sales of Class II medical devices; Retail of medical masks; Wholesale of medical masks; Sales of daily masks (non medical); Wholesale of protective equipment for medical staff; Retail of protective equipment for medical staff; Sales of labor protection equipment (for projects that require approval according to law, business activities can only be carried out after approval by relevant departments)