The business scope includes general projects such as technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Sales of building materials; Sales of building decoration materials; Sales of cement products; Sales of concrete structural components; Sales of doors and windows; Construction of metal doors and windows engineering; Sales of metal fittings for construction; Housing rental; Non residential real estate leasing; Rental services (excluding licensed rental services); Industrial engineering design services; Import and export of goods; Technology import and export; Import and export agency; Domestic trade agency; Manufacturing of concrete structural components; Manufacturing of non-ferrous metal alloys; Manufacturing of cement products; Manufacturing of metal fittings for construction; Sales of construction machinery; Sales of steel reinforcement products for construction; Industrial design services; Engineering management services; Labor services (excluding labor dispatch); Manufacturing of metal structures; Sales of metal structures; Engineering cost consulting services. (Except for projects that require approval according to law, business activities can be carried out independently based on the business license in accordance with the law) Licensed project: construction project construction; Construction labor subcontracting; Construction project design; Design of intelligent building systems; Residential interior decoration and renovation. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments. The specific business projects shall be subject to the approval documents or licenses issued by the relevant departments.)