Railway engineering, road construction, municipal engineering, house construction, water conservancy and hydropower, tunneling, bridge engineering, urban mass transit system engineering, steel structure engineering, earthwork, blasting, paving and laying, civil engineering, power line, signaling line and communication line installation, trunk line electrification engineering, environmental protection water treatment, decoration engineering, HVAC, curtain wall construction; boiler installation ,pipeline installation; foreign aid turnkey project construction; foreign engineering project contracting and domestic international project tendering, as well as the export of equipment and materials for the above-mentioned projects and the dispatching of contract workers for the above-mentionedforeignprojects; inspection and testing, engineering design, special equipment installation, maintenance, services, transformation and hiring; supply of materials, equipment hiring; selling of premixed concrete, prefabricated members (including bridge members), construction materials and steels.