改弦易轍

Simplified: 改弦易辙

gǎixiányìzhé ㄍㄞˇ ㄒㄧㄢˊ ㄧˋ ㄓㄜˊ

    • change of string, move out of rut (idiom) dramatic change of direction
    • to dance to a different tune

Character by character

Sources