Caiyuanba Bridge Introduction: Coral Park faces the Yangtze River, and the surging river water rushes past the foot of the park. The majestic Caiyuanba Bridge spans the river bank. It is a world-class bridge built by my country in Chongqing. It is also the largest long-span arch bridge for public transportation and urban light rail in China. The main span is 420 meters, making it the second largest in China. The span arch bridge has a total steel structure weight of 18,000 tons. The structural form of this bridge adopts a mid-bearing non-thrust concrete-filled steel tube tied arch bridge. It is a modern bridge that integrates various new bridge structural forms and scientific and technological achievements such as steel tube arch, steel box girder, and steel truss girder. This structural form is not only used in our country It is one of a kind and has a unique place among the bridges of the world.