Unforeseen danger
Unforeseen disaster, a Chinese idiom, Pinyin is w è IX í ngzh ī Hu à n, meaning an undiscovered disaster. It's from Zimu.
The origin of Idioms
Su Shunqin of the Song Dynasty wrote the fifth book of the consultative program: "if you are in a hurry, what's the use of getting money. It's better to be prepared first, so that we can make contributions and eliminate unforeseen troubles. "
Idiom usage
Used as an object; used in writing.
Unforeseen danger
A toad wants to eat a swan - lài há ma xiǎng chī tiān é ròu