The reason why Zhao Zhouqiao can be selected as a local engineering international historic site.

Zhao Zhouqiao, located in Zhao County, Hebei Province, was named after Zhao County was called Zhaozhou (also known as Anji Bridge) in ancient times. Zhao Zhouqiao was built during the reign of Emperor Yangdi (595-605 AD). According to Zhang's "An Ji" in the Tang Dynasty, "Zhaojun Weihe Stone Bridge is also a trace of Sui craftsmen".

It has a history of nearly 1400 years. It is not only the earliest and best-preserved giant stone arch bridge in China, but also in the world. It has had a far-reaching impact on the bridge construction in the future generations of the world, especially the application of "open shoulder arch" with arch on it, which is the first time in the history of bridges in the world. In Europe, the earliest open-shouldered arch bridges are the Antony Railway Stone Arch Bridge built by French and the Dashiqiao built by Luxemburg, but it is nearly 1 100 years later than Zhao Zhouqiao in China.

Zhao Zhouqiao has a total length of 64.4 meters, a vault width of 9 meters, an arch foot width of 9.6 meters, a span of 37.02 meters and an arch vector of 7.23 meters. On the whole, it is a single-hole arc stone bridge, which is made up of 28 stone arches laid side by side vertically. Its unique architectural structure has been called "Sophia Kao is the best in the world" since ancient times. It is not only highly scientific, but also has China's unique national artistic style. This is a masterpiece of ancient architecture in China.