General items: Import and export of goods, import and export of technology, import and export agent, import and export of food, sales of agricultural and sideline products, food sales (sales of pre-packaged food only), wholesale of edible agricultural products: Production, sales, processing, transportation, storage and other related services of agricultural products, sales of textiles and raw materials, sales of office supplies, wholesale of clothing, sales of general merchandise, Sales of home appliances, building materials, metal matrix composites and ceramic matrix composites; Machinery and equipment sales; Wholesale of hardware products: Chemical products sales (excluding licensed chemical products), metal products sales, instrument sales, electronic components wholesale; Intelligent robot sales; Purchase of primary agricultural products, retail of computer hardware, software and auxiliary equipment, sales of electronic measuring instruments, and sales of special equipment for oil drilling and production (except for items subject to approval according to law, independently carry out business activities according to law with business licenses).