Xu Mengke, who plays the role of Mephistopheles, prepares backstage 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. (Xinhua/Luo Huanhuan)
