Production of electric heating food processing equipment, production of disinfection equipment, installation and maintenance of gas combustion appliances; general items: manufacturing of special equipment for commercial, catering and service industries, manufacturing of metal daily-use articles, manufacturing of metal products for safety and fire protection, production of gas appliances, manufacturing of environmental protection special equipment, manufacturing of refrigeration and air conditioning equipment, sales of refrigeration and air conditioning equipment, wholesale of kitchen, bathroom and daily-use sundries, retail of kitchen, bathroom and daily-use sundries, sales of electric heating food processing equipment, sales of metal products, sales of office equipment, manufacturing of high-speed rail equipment and parts, sales of high-speed rail equipment and parts, manufacturing of railway rolling stock parts, sales of railway rolling stock parts, sales of railway transport infrastructure equipment, retail of computer software, hardware and auxiliary equipment.