Aerial view of Pingyao, UNESCO World Cultural Heritage site in China's Shanxi

In this aerial photo taken on May 7, 2019, tourists visit a gate tower in Pingyao, north China's Shanxi Province. Pingyao, a UNESCO World Cultural Heritage site in north China's Shanxi Province, is famous for its well-preserved ancient architecture including the city walls. (Xinhua/Zhan Yan)