Sales of valves and cocks; manufacturing of ordinary valves and cocks (excluding manufacturing of special equipment); retail of hardware products; wholesale of hardware products; sales of household appliances; sales of mechanical equipment; manufacturing of mechanical and electrical equipment; retail of daily household appliances; processing of mechanical parts and components; sales of mechanical parts and components; manufacturing of general equipment (excluding special equipment Equipment manufacturing); manufacturing of special equipment for the production of glass, ceramics and enamel products; manufacturing of general parts and components; sales of daily sundries; manufacturing of instruments and meters; sales of instruments and meters; repair of instruments and meters; manufacturing of daily glass products; sales of daily glass products; manufacturing of cultural and office equipment; sales of office equipment; sales of office equipment consumables; Manufacturing of power transmission, distribution and control equipment; sales of intelligent power transmission, distribution and control equipment; repair of electrical equipment; sales of electrical equipment; sales of mechanical and electrical equipment; sales of power electronic components; sales of special equipment for environmental protection; manufacturing of special equipment for environmental protection; technical services, technology development, technical consulting, technical exchanges, technology transfer, technology Technology promotion; Pump and vacuum equipment manufacturing; Pump and vacuum equipment sales; Software development; Furniture manufacturing; Furniture sales; Furniture spare parts production; Furniture spare parts sales; Furniture installation and repair services; Technical glass product manufacturing; Technical glass product sales; Glass manufacturing; Non-residential real estate leasing; Housing leasing; Import and export of goods.