The Zhaozhou Bridge is a circular-arc-shaped stone bridge, located on the Xiao River in Zhao County, Hebei Province. It was built in the Sui Dynasty, between the years of 595 and 605 AD, by the famous architect Li Chun. It has a history of more than a thousand years. Today, the bridge still competely preserves the ancient single-hole open-shoulder stone arch. It has stood on the Xiao River across time and even floods.