Installation and maintenance of gas burning appliances; general projects of residential interior decoration: manufacturing of daily necessities of metal; sales of metal products; repair of metal products; sales of metal materials; wholesale of kitchenware, sanitary ware and daily sundries; retail of kitchenware, sanitary ware and daily sundries; sales of daily necessities; retail of daily household appliances; sales of daily necessities; sales of daily sundries; commerce and beverages Sales of special equipment for food and service; sales of electric heating food processing equipment; sales of household appliances; repair of daily appliances; sales of special equipment; maintenance of electronic and mechanical equipment (excluding special equipment); sales of metal chains and other metal products; sales of metal wire ropes and their products; sales of metal structures; general mechanical equipment installation services; energy-saving management services Sales of special electronic equipment; sales of mechanical and electrical equipment; sales of smart home consumer equipment; furniture manufacturing; sales of refrigeration and air-conditioning equipment; sales of daily ceramic products; sales of glass instruments; sales of daily glass products; wholesale of hardware products; retail of hardware products; professional cleaning, cleaning, and disinfection services; sales of non-metallic minerals and products; professional equipment Planning services; graphic design; centralized disinfection services for catering utensils; production of gas appliances; manufacturing of metal structures; sales of fans and fans; manufacturing of fans and fans; manufacturing of refrigeration and air-conditioning equipment; manufacturing of special equipment for business, catering, and services; sales of direct drinking water equipment; sales of security equipment; sales of office equipment; wholesale of stationery supplies; general equipment repair