The renowned Zhaozhou Bridge in Hebei, also known as the Anji Bridge, derives its name from the ancient Zhaozhou (present-day Zhao County, Shijiazhuang City, Hebei Province), where it is located. Locally, it is known as the "Big Stone Bridge." Construction began around the 14th year of the Kaihuang reign of the Sui Dynasty (594 AD) and was completed in the early years of the Daye reign (around 605 AD), spanning over 1,400 years. Designed and constructed by the master craftsman Li Chun, it survives extensive repairs from the 8th year of the Zhenyuan reign of the Tang Dynasty (792 AD), through the Song Dynasty, the Ming and Qing Dynasties, and into modern times, remaining operational today. In 1961, it was designated a "National Key Cultural Relics Protection Site" and in 1991, it was recognized by the American Society of Civil Engineers (ASCE) as the 12th "International Civil Engineering Landmark."