General project: Sales of mechanical equipment Sales of electrical equipment, generators and generator sets, gears, gear reducers and gearboxes; Sales of pumps and vacuum equipment Valve bearing sales, distribution switch control equipment sales, stationery supplies and rotary refrigeration sales, sales; Wholesale of stationery supplies Sales of drawing, calculation and measuring instruments, retail of hardware products, wholesale of hardware products; Sales of labor protection supplies Sales of new energy prime mover equipment Sales of mechanical parts and components, maintenance of electronic and mechanical equipment (excluding special equipment), repair of general equipment, repair of special equipment, sales of metal products; Sales of household appliances, sales of chemical products (excluding chemical products subject to licensing), import and export of goods, import and export of technologies (except for projects that require approval by law, business activities are carried out independently in accordance with the business license)