Utilities installation works; electrical equipment design and technical consultancy services; sale of hardware, electrical equipment and equipment; electrical installation works, electrical construction, transmission and transformation works; sale of iron accessories; testing and testing of electrical equipment; operation, maintenance, overhauling and testing of electrical systems; municipal utility works; electrical and electrical installation works; construction and installation of urban and road lighting works; photovoltaic installation, construction, maintenance, repair and testing services; and labour dispatching。