HSK 7-9
开天辟地
kāitiān-pìdì(lit.) to split heaven and earth apart (refers to the Pangu 盘古 creation myth) (idiom); (fig.) unprecedented; first of its kind
互联网带来了开天辟地的变化。
Hù lián wǎng dài lái le kāi tiān pì dì de biàn huà.
The internet brought unprecedented changes.
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Appears across levels (7-9) in the HSK 3.0 word list.