Import and export of goods; Technology import and export; Sales of mechanical equipment; Sales of agricultural, forestry, animal husbandry and fishery machinery accessories; Sales of agricultural, forestry, animal husbandry, sideline and fishery professional machinery; Sales of new energy vehicles; Intelligent robot sales; Artificial intelligence hardware sales; Sales of intelligent basic manufacturing equipment; Sales of intelligent material handling equipment; Sales of intelligent storage equipment; Sales of agricultural products intelligent logistics equipment; Sales of intelligent port handling equipment; Sales of communication equipment; Sales of intelligent agricultural machinery equipment; Sales of photovoltaic equipment and components; Sales of power electronic components; Sales of electronic products; Sales of class I medical devices; Sales of class II medical devices; Sales of new cars; Sales of household appliances; Sales of daily necessities; Sales of construction machinery: Sales of Arts and crafts products and etiquette supplies (except ivory and its products); Toy sales; Sales of special equipment for environmental protection; Food sales (only pre packaged food); Sales of metal materials; Sales of packaging materials and products; Sales of building materials; Auto parts wholesale; Hardware products retail; Retail of computer software, hardware and auxiliary equipment (in addition to the licensed business, it can independently operate the items not prohibited or restricted by laws and regulations) licensed items: Category III medical device business (the items that must be approved according to law can only be operated after being approved by relevant departments, and the specific business items shall be subject to the approval documents or licenses of relevant departments)