煥然一新

Simplified: 焕然一新

On the HSK 7-9 vocabulary list, at CEFR level C1.

huànrányīxīn ㄏㄨㄢˋ ㄖㄢˊ ㄧ ㄒㄧㄣ

    • to look completely new (idiom) brand new
    • changed beyond recognition

Character by character

Sources