盖头换面

Explanation: Still a face-lift. Analogy only change the appearance and form, in substance the same. 　　Source: Ming Tang Shun, "A study of calligraphy Wang Nanjiang mention": "Servant Song-Wu Xiong after stealing two books, see Hui, Wu Xiong know the pain of regret punish past, straight like washing the stomach, the lid would not change if the world do people face persons. "