Sale: Chemical raw materials( No hazardous chemicals), building materials, steel, Direct sales of electricity、 heat、 Coal used by briquette production enterprises( Direct users do not land in Cangzhou), coke, Iron ore powder, Metallurgical furnace charge, Mechanical equipment, Pipe fittings, Agricultural machinery and accessories, Hardware and Electrical; Self-operated and agency import and export of goods、 Technology import and export( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments)