Manufacturing and sales: motorcycle valves, automobile valves and parts, mechanical equipment and parts, electromechanical equipment and parts; sales: building materials (excluding chemical dangerous goods), chemical products and raw materials (excluding chemical dangerous goods), metal materials, rubber products, plastic products, Wujinjiaodian, wires and cables, daily necessities; import and export of goods; general freight (relevant administrative licenses or approvals must be obtained before engaging in business). (No operations are allowed if prohibited by laws and regulations; operations must be obtained after obtaining administrative approval or license if restricted by laws and regulations)**