Tourists visit the ancient city of Pingyao in Jinzhong, north China's Shanxi Province, on Dec. 25, 2019. 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. The city boomed in the 19th century as China's financial center, as Shanxi merchants expanded their businesses across the country. Now, the well-preserved compounds of these affluent merchants and some emerging modern elements like souvenir shops, bars, photography festival and theatrical performances have again brought the ancient city to life and made it a popular tourist attraction. (Xinhua/Zhan Yan)