前塵往事 [－尘－－]

Jyutping cin4 can4 wong5 si6
Pinyin qián chén wǎng shì

Definitions (CC-CANTO)
  1. things that happened long time ago; memory from the past
Definitions (粵典–words.hk)
  1. 名詞
    指過​去​發​生​嘅​事
    things that happened in the past; literally: the dust of the past
Definitions (Wiktionary)
  1. phrase, idiomatic
    things of the past