Danzhou (modern Shaanxi) explained

Danzhou or Dan Prefecture (丹州) was a zhou (prefecture) in imperial China, with its seat in modern Yichuan County, Shaanxi. It existed intermittently from 554 until 1269, when the territory fell to the Mongols.

References

• Book: Shi Weile. 2005. Zhongguo Lishi Diming Da Cidian (中国历史地名大词典). Large Dictionary of Chinese Historical Place Names. China Social Sciences Press. 7-5004-4929-1. 2214–2215. zh.