Hezhou (Chongqing)

Hezhou or He Prefecture (合州) was a "zhou" (prefecture) in imperial China centering on modern Hechuan District, Chongqing, China. It existed (intermittently) from 556 to 1913.
Geography.
The administrative region of Hezhou in the Tang dynasty is in modern western Chongqing on the border with Sichuan. It probably includes parts of modern: 