Taivo A Taiwan Mandarin dictionary

懲前毖後

chéngqiánbìhòu

ㄔㄥˊ ㄑㄧㄢˊ ㄅㄧˋ ㄏㄡˋ

Simplified 惩前毖后

  1. 1lit. to punish those before to prevent those after (idiom); to criticize former mistakes firmly to prevent them happening again

Keep 懲前毖後 and it comes back until you know it.

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