China Railway No.1 Engineering Group Co., Ltd. is a large-scale comprehensive construction enterprise, with special qualification for general contracting of railway engineering and highway engineering, first-class qualification for general contracting of municipal and housing construction engineering, and first-class qualification for professional contracting of railway bridge, highway pavement, tunnel, hydraulic tunnel and urban rail. It integrates scientific research and technology development, building construction, equipment installation, processing and manufacturing, construction machinery and automobile repair, material supply and marketing, engineering supervision and technical consultation, and diversified operations.