賊過興兵 [贼过兴－]

Jyutping caak6 gwo3 hing1 bing1
Pinyin zéi guò xīng bīng

Definitions (粵典–words.hk)
  1. 語句
    坐視​禍患​發生​，​延至​傷害​無法​避免​或​補救​時始訴​諸無效​之​行動​，​徒勞​一場​以示​關注
    to take action only until the damage cannot be avoided; a show-off action
  2. 反義詞
    亡羊補牢、未雨綢繆、防患未然