strategic pass
It is a Chinese idiom. The Pinyin is Xi á oh á nzh ī g ù, which means that the terrain is very dangerous. It comes from Guo Qin Lun.
The origin of Idioms
Han Jiayi's "on passing Qin Dynasty" said: "the emperor Xiaogong of Qin supported the land of Yongzhou according to the solid of Guhan letter."
Idiom usage
As an object; with commendatory meaning; refers to a dangerous place.
Chinese PinYin : xiáo hán zhī gù
strategic pass
mountains fall and the earth splits. shān bēng dì tā