The wholesale, retail building materials, metal products, plastics, plastic products, automobile parts, textiles, Riyongbaihuo, mechanical and electrical products, handicrafts, office supplies, operating all types of import and export of goods and technology (not attach a directory of import and export of goods) , But the state limited company to operate and the prohibition of the import and export of goods and technology except. (Laws and regulations must apply for approval permission to engage in the business, approval must be obtained after the prescribed order of business permits.)