Baozhou or Bao Prefecture (保州), known as Baosai Prefecture (保塞軍) between 960 and 981, was a zhou (prefecture) in imperial China centering on modern Baoding, Hebei, China.
Shi Weile, ed. (2005). Zhongguo Lishi Diming Da Cidian (中国历史地名大词典)[Large Dictionary of Chinese Historical Place Names] (in Chinese). China Social Sciences Press. p.1917. ISBN7-5004-4929-1.