ㄌㄧㄣˊㄎㄜˇ穿ㄔㄨㄢㄐㄧㄥˇlínkě‑chuānjǐng

临渴穿井
  1. 口渴打通水井比喻臨頭辦法解決 馬拉松現在根本臨渴穿井來不及!」。

lit. face thirst and dig a well (idiom)​; fig. not to make adequate provision, to act when it is too late