将功补过 jiānggōng-bǔguò
[make amends for one’s faults by good deeds;redeem sin by meritorous service;atone for a crime by good service;expiate one's crime by good service] 加倍用功出力以弥补以往的罪过
以功劳补偿过错。如:犯了错误的同志,都要努力改正,将功补过。