夜深人静
yèshēn-rénjìngTraditional 夜深人靜
in the dead of night; late at night when all is quiet
Every meaning
yèshēn-rénjìng
- in the dead of night; late at night when all is quiet
Its characters
Words with 夜
Words with 深
Meanings from our own dictionary. Chengyu from the Xinhua idiom list, the most common first.