改頭換面 [ㄍㄞˇ ㄊㄡˊ ㄏㄨㄢˋ ㄇㄧㄢˋ; gai3 tou2 huan4 mian4] to adjust one's head and turn one's face (idiom); cosmetic changes Despite superficially new policies, the substance remains unchanged. ◄ ►