A rainbow 100 feet high is across the water, and a crescent moon falls from the sky, which is Anji Bridge. This is a famous sentence by Zhu, a poet in Ming Dynasty, praising Anji Bridge. Anji Bridge is located on the Weihe River, five miles south of Zhao County, Hebei Province. It was designed and built by Li Chun, a stonemason in Sui Dynasty. It is nearly 1400 years ago and is the oldest and most magnificent stone arch bridge in the world.

Anji Bridge is the largest span and the most intact single-hole open-shouldered stone arch bridge in the world. Its unique construction technology is the first "open-shouldered arch" structure in the history of bridges in the world, which has high scientific research value. The carving knife method is vigorous and powerful, and the artistic style is novel and bold, which shows the rich, rigorous and elegant stone carving style of Sui Dynasty. The pattern of the bridge body is finely carved and has high artistic value. Anji Bridge occupies an important position in the history of bridge construction in China, and has a far-reaching influence on bridge construction in later generations around the world.