底兒朝天

Simplified: 底儿朝天

dǐrcháotiān ㄉㄧˇㄦ ㄔㄠˊ ㄊㄧㄢ

    • upside down
    • to search or expose something thoroughly

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
bottom facing the sky
Meaning
Turned upside down. Figuratively, to search something thoroughly or expose a matter completely.

Sources