1. The Zhaozhou Anji Bridge, built by Li Chun during the Sui Dynasty, is the oldest stone arch bridge in China, and one of the most significant examples of pre-modern Chinese civil engineering. 隋朝李春建造的赵州桥，又名安济桥，是中国最古老的石拱桥，展现了中国古代最先进的土木工程水平。