"Historical Records and Biography of Qu Yuan" recorded that "Qin sent troops to attack it, and Chu was defeated by Dan". The so-called Danxi refers to the Danxi basin in Xichuan, and its specific orientation refers to the Xixia in Xichuan and the Danjiang and Xishui basins, tributaries of the Han River near Shangnan. The geographical location of Danxi River basin is very important: it can reach Sanqin along the west of Danjiang River, Sanjin along the north of Xishui River, and Chu and Han along Danjiang River and Xishui River. Therefore, there are Lutong Qin Jin and Shuida Wu Chu.
So its name comes from the local Danjiang River and the Zheshui River in the Danzhe River Basin.