改梁换柱

Explanation: Metaphor of playing tricks secret change things, the nature of the content or something. 　　Source: Guo, "Literary Essays Reading Liangren Gong <Mozi new society of organizations Law", "Hu Shi and Liang Ren is also very aware of his religion, circular reasoning is insufficient to meet the requirements of our modern people, so strongly in the use of beam method for column change, take him to another to change the fundamental concept of the program up a little more attractive. "