Licensed project: Construction project construction; Residential interior decoration and renovation; Construction project design; Construction labor subcontracting; Construction projects (excluding nuclear power plant construction and operation, civil airport construction). (For projects that require approval by law, business activities can only be carried out after approval by relevant departments. Specific business projects shall be subject to the approval documents or licenses issued by relevant departments. ) General projects: Sales of steel reinforcement products for construction; Sales of metal structures; Sales of concrete structural components; Construction of metal doors and windows engineering; Engineering management services; Construction of earthwork engineering; Construction of landscaping and greening projects; Sales of building materials; Sales of coatings (excluding hazardous chemicals); Dye sales; Professional design services; Retail of hardware products; Manufacturing of lightweight building materials; Sales of building decoration materials; Sales of lightweight building materials; Sales of building blocks; Sales of building waterproofing membrane products; Sales of high-quality special steel materials; Sales of metal products; Sales of sanitary ware;