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); wholesale: Mechanical equipment and spare parts, Instruments, ceramic products, Chemical products( No dangerous goods), Metal products, steel, Building Materials, steel slag, Water slag, copper slag, Desulfurization gypsum, fly ash。( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments)