ㄘㄨㄥˊㄐㄧㄥˇㄐㄧㄡˋㄖㄣˊcóngjǐng‑jiùrén

从井救人
  1. 比喻不利行為危險救助別人 從井救人何其!」。

to jump into a well to rescue sb else (idiom)​; fig. to help others at the risk to oneself