How long is Zhao Zhouqiao?

Zhao Zhouqiao is the first open-shouldered stone arch bridge to be selected into the world record association Book of World Records, which is the best in the world. Known as "one of Four Treasures of the Study in North China". The bridge is 50.82 meters long, 37.02 meters across, 7.23 meters high, 9.6 meters wide at both ends, slightly narrower in the middle and 9 meters wide. Because the shoulders at both ends of the bridge have two small holes, which are not solid, it is called open shoulder type, which is a creation in the history of bridge building in the world (called full shoulder type or solid shoulder type without small arch). There are many things on the bridge, many kinds and colorful. Zhang Kun of the Tang Dynasty said that looking at this bridge from a distance is like "Yun Qi in the early month, Changhong drinking the stream".