'Punish past errors to prevent future ones' is an ancient Chinese principle of governance.
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usage
惩 is a classical/literary character that rarely appears alone in modern Chinese. It is most common in compounds: 惩罚 (chéngfá, to punish), 严惩 (yánchéng, to punish severely), 奖惩 (jiǎngchéng, rewards and punishments), and the idiom 惩前毖后.
