Zhao Zhouqiao, located in Kaifeng City, Henan Province, China, is an ancient stone arch bridge across the Yellow River. It was built in the great cause of the Sui Dynasty (605-6 16) and took nine years to complete. According to records, this bridge was built by general Xue of Sui Dynasty, and many advanced technologies and tools were adopted in the construction process.

Zhao Zhouqiao is167m long, 9.6m wide and 7.3m high. It used 12 stone arch pier to support the whole bridge, which was a very bold and innovative design at that time. At the same time, many special tools and technologies are used in the construction process, such as underwater pile drivers and underwater excavators.

Zhao Zhouqiao has experienced thousands of years of vicissitudes. Although it has been hit by floods and destroyed by wars for many times, it has been preserved throughout the ages and has become a classic in the history of ancient architecture in China.