Engineering machinery and its accessories, mining machinery and its accessories, household appliances and their accessories, automotive accessories, hardware and electrical appliances, electronic products, electrical machinery, chemical products (excluding hazardous chemicals), rubber products, plastic products, building materials (excluding wood and hazardous chemicals), steel, metal materials, Ordinal labor protection products, daily necessities, decorative materials (excluding wood and hazardous chemicals) Sales of office supplies; Import and export business of goods and technology (excluding those prohibited or restricted by the state) For projects that require approval according to law, business activities can only be carried out with the approval of relevant departments