懲前毖後 [ㄔㄥˊ ㄑㄧㄢˊ ㄅㄧˋ ㄏㄡˋ; cheng2 qian2 bi4 hou4] lit. to punish those before to prevent those after (idiom); to criticize former mistakes firmly to prevent them happening again ◄ ►
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