China Railway Fourth Engineering Group Co., Ltd., established on 1994-10-18, Business scope includes construction of railway projects,Road construction,Municipal Engineering,Water Resources and Hydropower Engineering,Urban Rail Transit Engineering,House Construction and Installation,Basic engineering,Water supply and drainage project,Environmental Engineering,airport runway,Automobile proving ground and track engineering,other road,tunnel,bridge engineering;Contracting and its strength,scale,Foreign engineering projects that are compatible with performance;Dispatch labor personnel required for the implementation of the above-mentioned overseas projects;Construction machinery and equipment rental,repair,transportation;Material sales,Turnover material leasing;Commercial concrete,Concrete structural parts,bridge girder,track board,sleeper,Manufacture and sale of concrete products;Own real estate business activities,real estate lease,property management;Engineering test detection,engineering survey,technical consulting,technology transfer.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)