General business projects: design and construction of building decoration and decoration projects; design and construction of building intelligent projects; design and construction of fire protection facilities projects; environmental engineering design and construction; mechanical and electrical equipment engineering design and construction; energy saving and environmental protection engineering design and construction; urban road lighting engineering design and construction; steel structure engineering design and construction; waterproof, anti-corrosion and insulation engineering design and construction; building curtain wall engineering design and construction; safety technology prevention system design, construction and maintenance; landscaping engineering construction; exhibition display engineering design and construction; design and construction of signage engineering; construction engineering construction