除舊布新 [－旧－－]

Jyutping ceoi4 gau6 bou3 san1
Pinyin chú jiù bù xīn

Definitions (CC-CEDICT)
  1. to get rid of the old to bring in the new (idiom); to innovate
Definitions (Wiktionary)
  1. phrase, idiomatic
    to demolish the old and establish the new