General projects: Technology service, technology development, technology consultation, technology exchange, technology transfer and technology promotion; Metal material manufacturing; Sales of metal products; Metal structure manufacturing; Manufacturing of metal signs for traffic and public management; Manufacturing of special equipment for traffic safety and control; Sale of signs for traffic and public administration; Municipal facilities management; Urban rail transit equipment manufacturing; Urban greening management; Plastic products manufacturing; Sales of plastic products; Car park services; Lighting appliances sales; Sales of cement products (except for the items that need to be approved according to law, the business activities shall be carried out independently according to law with the business license)