China Railway Shanhaiguan Bridge Group Co., Ltd. (CRSBG), established in the year of 1894, is a large state-owned enterprise of great diversification, specializing in the field of manufacturing for industrial purpose. Her product scope covers steel structures for bridges, buildings and power plants; railway turnouts for railroads, subways, and city transits; high manganese steel frogs, railway components, ISO containers and containers for special purpose; machineries for lifting and loading of goods, erecting and laying of bridges and rail assemblies, and maintaining of tracks; high strength bolts and various of fasteners. CRSBG has registered for several international standards. With the right to do foreign trade and business, products of CRSBG have been sold to tens of countries and origins all over the world.