An aerial drone photo taken on April 24, 2024 shows the Zhaozhou Bridge scenic area at night in Zhaoxian County, north China's Hebei Province. Built in the Sui Dynasty (581-618), the 1,400-year-old Zhaozhou Bridge stands over the Xiaohe River in Zhaoxian County, Hebei Province. It is the world's oldest single-arch bridge.

A combination of location, design and excellent construction are the main reasons why the bridge has withstood earthquake, flood and war for 1,400 years.

Along with such world-famous landmarks as the Forbidden City and the Great Wall, the bridge was listed into China's first group of national cultural heritage protection sites in 1961.

Nowadays, the Zhaozhou Bridge scenic area has been open to public for free, bringing numerous tourists into the county. (Xinhua/Wang Yuguo)

An aerial drone photo taken on April 25, 2024 shows tourists on the Zhaozhou Bridge in Zhaoxian County, north China's Hebei Province. (Xinhua/Wang Yuguo)