Two boys learn Peking Opera performance at the Temple Theatre Beijing Opera House in Beijing, capital of China, April 18, 2013. Students from an international school in Beijing participated in a public education activity named "the charm of Sheng, Dan, Jing, Chou in Peking Opera" on Thursday here. "Sheng","Dan","Jing" and "Chou" refer to different roles in Peking Opera. (Xinhua/Pan Siwei)