偷梁換柱 [ㄊㄡ ㄌㄧㄤˊ ㄏㄨㄢˋ ㄓㄨˋ; tou1 liang2 huan4 zhu4] lit. to steal a rafter and replace it with a column to replace the original with a fake to perpetrate a fraud (idiom) ◄ ►