改弦更張 [－－－张]

Jyutping goi2 jin4 gang1 zoeng1
Pinyin gǎi xián gēng zhāng

Definitions (CC-CANTO)
  1. to make a fresh start; to start a total reform; to change policy
Definitions (Wiktionary)
  1. phrase, idiomatic
    to reform or revamp (a system or policy)
    (syn.) 改弦易辙, 改弦易轍