Guozhou or Guo Prefecture (果州) was a zhou (prefecture) in imperial China, centering on modern Nanchong, Sichuan, China. It existed (intermittently) from 621 until 1227. Between 771 and 775 it was known as Chongzhou or Chong Prefecture (充州).
Geography
The administrative region of Guozhou in the Tang dynasty is in modern northeastern Sichuan. It probably includes parts of modern:
References
Guǒ Prefecture Wikipedia(Text) CC BY-SA