mend one's ways, turn over a new leaf
也许我们能带他回来但他必须改过自新才行
Maybe we can bring him back, but only if he truly turns over a new leaf.
— 四百击 (1959)
我改过自新了。
I've turned over a new leaf.
这对他改过自新会很好！
This will be good for him to turn over a new leaf!
— 歌剧红伶 (1981)
"说,伙计别说你改过自新了"
Come on, man, don’t tell me you’ve turned over a new leaf.
— 穆那大哥做医生 (2003)