Manufacturing of metal materials; sales of metal chains and other metal products; repair of metal products; sales of forgings and powder metallurgy products; sales of metal products; production of furniture spare parts; manufacturing of forgings and powder metallurgy products; sales of new functional metal materials; sales of non-ferrous metal alloys; sales of metal materials; sales of special equipment; wholesale of hardware products; sales of electrical accessories; sales of metal tools; machinery Sales of parts and components; repair of electrical equipment; sales of daily necessities; sales of electrical equipment; sales of mechanical and electrical equipment; sales of household audio-visual equipment; sales of household appliances; retail of daily household appliances; installation services of household appliances; repair of household appliances; sales of solar thermal power generation products; manufacturing of non-metallic mineral material forming machinery; sales of non-metallic minerals and products; sales of gears, gear reducers and gearboxes.