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.
strategic pass
Well water doesn't make river water - jǐng shuǐ bù fàn hé shuǐ
an official who doesn 't expect to remain long in office - wǔ rì jīng zhào
See not take, think of thousands of miles - jiàn zhī bù qǔ,sī zhī qiān lǐ
go through the ceremonies of appointing a commander-in-chief - zhù tán bài jiàng
When enemies meet, they are especially open-minded - chóu rén xiāng jiàn ,fèn wài yǎn zhēng
display one 's skill to the full - dà xiǎn shēn shǒu