In 1144 it was split into Lizhou East Circuit and Lizhou West Circuit. The 2 smaller circuits rejoined in 1168, split again in 1175, rejoined again in 1176, split again in 1178, rejoined again in 1194, split again in 1196, rejoined again in 1210, and split again in 1218.
Its administrative area corresponds to roughly the modern provinces of northern Sichuan, southern Shaanxi and southern Gansu.
References
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. 1276. ISBN7-5004-4929-1.