朝聞夕改

Simplified: 朝闻夕改

zhāowénxīgǎi ㄓㄠ ㄨㄣˊ ㄒㄧ ㄍㄞˇ

    • lit. heard in the morning and changed by the evening
    • to correct an error very quickly (idiom)

Character by character

Sources