Manufacturing, processing, installation, and maintenance of mechanical equipment and parts, refrigeration equipment and parts; wholesale and retail of mechanical equipment, rubber and plastic products, electronic products, household appliances, refrigeration equipment and parts, Wujinjiaodian, auto parts, motorcycle parts, electronic components, warehousing equipment, metal products, steel, and daily necessities; exhibition display services, marketing planning, business information consultation, and e-commerce (not allowed to engage in value-added telecommunications and financial services). [Projects that require approval according to law can only be carried out with approval from relevant departments]