开天辟地

Traditional (Taiwan): 開天闢地

On the HSK 7-9 vocabulary list, at CEFR level C2.

kāitiānpìdì ㄎㄞㄊㄧㄢㄆㄧˋ ㄉㄧˋ

- to split heaven and earth apart (refers to the Pangu 盘古 pángǔ creation myth) (idiom)
  lit.
- unprecedented first of its kind
  fig.

Character by character

Sources