What is "kuizhou"

Kui Prefecture, Kuizhou Circuit, or Kuizhou was initially established in 619 CE, as a renaming of the existing Xin Prefecture. Kuizhou was an important area from the beginning and through the end of the Tang Dynasty of China, when it was alternatively part of several of the Circuits which made up typical large scale political structural organizations of the Tang era. Kuizhou continued as a political entity through the end of the Song Dynasty, during which it was of Provincial level, a typical large scale political organization of Song era (and later). Kui Prefecture was located in what is now eastern Chongqing. During the Song Dynasty, Kuizhou's capital was located in what is now Fengjie County, Chongqing, and the extent of the province was to what today includes Chongqing, eastern Sichuan, and Guizhou. Part of the importance of Kuizhou was related to its prominent location along the Yangzi River. Kui was also known for its spectacular scenerary, and being a location in which exiled poets wrote their laments.