wholesale、 retail: Metal materials, Hardware accessories, Chemical raw materials and products( Removal of hazardous chemicals and precursor chemicals), Wood products, Daily necessities, Instruments, Communication equipment, Electronics, Steel-plastic composite pipe; Import and export of goods、 Technology import and export( law、 Except for items prohibited by administrative regulations, law、 Projects restricted by administrative regulations may only be operated after obtaining a license); All other legal projects that do not require approval。