Auto parts wholesale; Auto parts retail; Automobile decoration supplies sales; Lubricating oil sales; Sales of electronic products; Motorcycle and spare parts retail; Tire sales; Tram sales; Daily necessities sales; General merchandise sales; Sales of plastic products; Paper products sales; Sales of household appliances; Packaging materials and products sales; Metal tool sales; Hardware products wholesale; Sales of electrical accessories; Sales of special labor protection products; Sales of mechanical parts and spare parts; Building materials sales; Office equipment sales; Sales of daily chemical products; Office supplies sales; Sales of arts and crafts and ceremonial articles (except ivory and its products); Needle textile sales; Sales of needle textiles and raw materials; Sales of labor protection products; Food sales (pre-packaged food only); Technology import and export; Import and export of goods.