China Railway Fourth Bureau Group Steel Structure Construction Co., Ltd., established on 1993-06-12, The business scope includes construction general contracting and professional contracting level 1;First-class construction general contracting of mechanical and electrical installation engineering;Steel structure engineering professional contracting level 1;Professional contracting of building decoration and decoration engineering;Professional contracting of building curtain wall engineering;Light house steel structure(single layer steel frame,shelving,multi-layer frame,grid)Class A special engineering design;Electromechanical equipment and accessories,Central air conditioning,Water supply and drainage equipment,Installation of fire fighting equipment;Lifting and transportation machinery and equipment rental maintenance;building materials,Electrical Equipment,rails,sleeper,Railway special equipment and accessories,electrical signal equipment,Railway construction equipment,Electrical equipment,Electrified Railway Equipment,communication equipment(Excluding radio and television terrestrial reception facilities),Electrical Equipment,gravel,gravel for construction,Sales of cement products and products;Software development and technical services;Machinery and equipment leasing and road general cargo transportation.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)