General equipment manufacturing (excluding special equipment manufacturing); General parts manufacturing; Technical service, technical development, technical consultation, technical exchange, technology transfer and technology promotion; Manufacturing of special equipment (excluding manufacturing of licensed professional equipment); Manufacturing of special equipment for commerce, catering and service; Manufacturing of special equipment for food, wine, beverage and tea production; Manufacturing of refrigeration and air conditioning equipment; R&D of mechanical equipment; Sales of machinery and equipment; Sales of vending machines; Sales of mechanical parts and components; Household appliance manufacturing; Manufacturing of mechanical and electrical equipment; Manufacturing of pumps and vacuum equipment; Manufacturing of general feeding and distribution devices; Sales of industrial control computers and systems; Intelligent robot sales; Sales of household appliances; Sales of electrical and mechanical equipment; Machining of mechanical parts and components; Artificial intelligence hardware sales; Sales of refrigeration and air conditioning equipment; Sales of industrial robots; Software sales; Sales of electrical accessories; Used goods sales; Engineering and technical research and test development; Information system integration service; Research and development of household appliances; Software development; Research and development of IoT technology; Artificial intelligence application software development; General application system of artificial intelligence; Integrated circuit design; Internet of Things application services; Research and development of intelligent robots; Internet data service; Big data service; Machinery and equipment leasing; Sales agent; Maintenance of electronic and mechanical equipment (excluding special equipment); Food business (only pre packaged food is sold); Sales of household products; Sales of spare parts of household appliances; Sales of pumps and vacuum equipment; Internet equipment sales; Sales of special electronic equipment; Sales of electronic measuring instruments; Sales of intelligent warehousing equipment; Sales of intelligent basic manufacturing equipment; Sales of smart home consumption equipment; Sales of gas and liquid separation and purification equipment; Sales of currency specific equipment; IC sales; Engineering technical services (excluding planning management, survey, design and supervision); Industrial design services; Integrated circuit chip design and service; Professional design services; Data processing service; Research and development of kitchenware, sanitary ware and daily sundries; Wholesale of kitchenware, sanitary ware and daily sundries; Domestic freight forwarding agent; Trade brokerage; Domestic trade agency; Procurement agency services; Labor services (excluding labor dispatch); Import and export of goods; Technology import and export; Food Internet sales (sales of pre packaged food)