Permitted projects: Construction works; Electrical installation services (projects subject to approval according to law, business activities can only be carried out after approval by relevant departments, the specific business projects shall be subject to the approval results) General projects: Engineering and technology research and test development; Mechanical and electrical equipment sales; Distribution switch control equipment sales; Metal structure sales; Sales of electrical accessories; Sales of power electronic components; Metal material sales; Hardware products wholesale; Hardware products retail; Import and export of goods; Technology import and export; Instrument sales; Valve and cock sales; Cement products sales; Sales of plastic products; Sales of machinery parts and spare parts (except for items subject to approval according to law, independently carry out business activities according to law with business licenses)