The ancient city of Hunyuan is located in Hunyuan County, Datong City. It includes ancient buildings such as Yong'an Zen Temple, Yuanjue Temple Brick Pagoda, Hunyuan Confucian Temple and Hunyuan County Government. It is brightly lit at night and looks very beautiful. There are various performances and stalls on holidays, and the shops on both sides of the road also have local characteristics. If you come back from the Hanging Temple, you must visit the ancient city. It is worth taking time to see it.