Zhao Zhouqiao's slogan?

"Millennium Rainbow"-Zhao Zhouqiao, located in Zhao County, Hebei Province, was built from 605 to 665438, designed and supervised by famous craftsman Li Chun. Zhao Zhouqiao is a single arch bridge with a total length of 37.02 meters. It's sturdy and spectacular. It was the stone arch bridge with the largest number of factories in the world at that time. Zhao Zhouqiao's greatest scientific contribution is the creation of the "open-shouldered arch". On the two shoulders of the big arch, there are four parallel small arches pressing the big arch, which enhances the stability of the bridge. In the history of 65,438+0,400 years, this excellent design has enabled Zhao Zhouqiao to withstand the heavy pressure of p8 earthquake and vehicles many times, and it is still intact.