有则改之，无则加勉 (有則改之，無則加勉) yǒu zé gǎi zhī, wú zé jiā miǎn

yǒu zé gǎi zhī, wú zé jiā miǎn phrase correct any mistakes you made, but maintain your good record if you did not make them
Domain: Proverb 谚语
Notes: (CC-CEDICT '有則改之，無則加勉')