前車之鑒 [－车－鉴]

Jyutping cin4 ce1 zi1 gaam3
Pinyin qián chē zhī jiàn

Definitions (CC-CEDICT)
  1. to learn a lesson from the mistakes of one's predecessor (idiom)
Definitions (Wiktionary)
  1. phrase, idiomatic
    previous experience of failure that serves as a lesson for oneself or others