小懲大誡

Simplified: 小惩大诫

xiǎochéngdàjiè ㄒㄧㄠˇ ㄔㄥˊ ㄉㄚˋ ㄐㄧㄝˋ

    • lit. to punish a little to prevent a lot (idiom) to criticize former mistakes firmly to prevent large scale repetition

Character by character

Sources