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Open the tool →伯玉知非 (bó yù zhī fēi) is a Chinese idiom (chengyu) meaning “to realize one's past mistakes”.
伯玉知非 is pronounced bó yù zhī fēi in Mandarin Chinese.
Literally, 伯玉知非 means “Boyu realized his past wrongs”. It is used to mean “to realize one's past mistakes”.
伯玉:蘧瑗,字伯玉,春秋时卫国人;非:不对。比喻知道以前不对。