換湯不換藥 [ㄏㄨㄢˋ ㄊㄤ ㄅㄨˋ ㄏㄨㄢˋ ㄧㄠˋ; huan4 tang1 bu4 huan4 yao4] different broth but the same old medicine (idiom); a change in name only a change in form but not in substance ◄ ►