如临深渊

Explanation: Pro: near; deep: deep puddles. As is usually the edge of the abyss. Analogy wary to act with great care. 　　Source: "Poetry Xiaoya Little Zong," nervously, standing on the edge into the abyss, treading on thin ice. " 　　Examples: People living on the Yellow Emperor, anxious ~. (Ming Li Zhi, "the beginning of a monarch and his subjects Lake _Set_") Thesaurus:  cautious and conscientious, pull sb's chestnut out of the fire, beard the lion in his den, Jaws of death as the tiger's mouth Seize food, tread on delicate ground, jitter Antonym Group:   have plenty of guts, effortlessly; as easy as to blow away the dust; with the slightest effort, just a small effort, Nothing be afraid of, Wusuo scruple, not care a bean (s), Just full of bile, audacious in the extreme; with reckless daring, Daringness Bao Shen, Bold, such as bucket, rush in where angels fear to tread