Housing construction engineering, municipal public engineering, steel structure engineering, environmental protection engineering, foundation and foundation engineering, road and bridge engineering, landscaping engineering, building decoration engineering, anti-corrosion and thermal insulation engineering, earthwork engineering, water conservancy and hydropower engineering, fire engineering, building intelligent chemical engineering, urban and road lighting engineering, highway engineering, river and lake renovation engineering, tunnel engineering, communication engineering, antique building engineering Design and construction of sports facilities engineering, building reinforcement engineering, and waterproofing engineering; Installation of electromechanical equipment; Construction labor subcontracting; Provide construction labor services (excluding labor dispatch). (Projects that require approval according to law can only be operated with the approval of relevant departments. )