【痛改前非】〖tòng gi qián fi〗[repent thoroughly of one's misdeeds; correct one's errors; earnestly repent and reform former faults; make a clean break with one's past errors]

痛自创艾重做人，

改行从善挚诚心。

前车之鉴引为戒，

非请莫入道义遵。