Production of electric heating food processing equipment; installation and repair of gas combustion appliances. General items: research and development of kitchen and bathroom utensils and daily-use sundries; wholesale of kitchen and bathroom utensils and daily-use sundries; manufacture of metal structures; manufacture of environmental protection specialized equipment; manufacture of general equipment (excluding special equipment manufacturing); manufacture of fans and blowers; manufacture of household appliances; sales of metal products; research and development of metal products; manufacture of furniture; wholesale of hardware products; sales of household items; sales of electric heating food processing equipment; manufacture of hardware products; installation services for household appliances; repair of daily-use electrical appliances; centralized disinfection services for catering utensils; production of gas appliances; sales of fire-fighting equipment; sales of refrigeration and air conditioning equipment; installation and maintenance services for residential water and electricity; road freight transport of ordinary goods with a total mass of 4.5 tons or less (excluding network freight and dangerous goods); industrial design services; engineering technical services (excluding planning, management, survey, design, supervision, etc.); graphic design; industrial engineering design services; energy-saving management services; sales of special equipment; sales of machinery and equipment; installation services for general machinery and equipment; repair of general equipment; manufacture of building decoration, water and heating pipeline parts and other building metal products; manufacture of specialized equipment for commerce, catering and services; manufacture of non-electric household appliances; professional design services.