Liu Dake, who plays the role of Faust, and Xu Mengke, who plays the role of Mephistopheles, take a rest during the performance of experimental Peking opera "Faust" in Wiesbaden, west Germany, May 15, 2017. Experimental Peking opera "Faust" was staged Monday evening in Wiesbaden, starting its 15-day tour in Germany. [Photo/Xinhua]