翻天覆地 fāntiān-fùdì sky and the earth turning upside down
sky and the earth turning upside down (idiom); figuratively complete confusion; everything turned on its head
How to remember 翻天覆地: 翻 turn over + 天 day + 覆 to cover + 地 ground = sky and the earth turning upside down.
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How it is used
- 'Heaven and earth overturned' - earth-shaking, total change - 发生了翻天覆地的变化 (fāshēng le fāntiān-fùdì de biànhuà) underwent tremendous, sweeping changes.
- Idiom stressing the enormous scale of transformation; usually modifies 变化 (biànhuà, change).
- Emphatic, common in describing dramatic before/after differences.