Georgian concert pianists Khatia (L) and Gvantsa Buniatishvili respond to the applause at the end of their performance during Rheingao Musik Festival at the Schloss Johannisberg in Geisenheim, Germany, on Aug. 12, 2015. The Rheingao Music Festival is held from June 27 to September 12. (Xinhua/Luo Huanhuan)
