Members of the Forbidden City Chamber Orchestra of the Chinese Conservatory of Music perform during the 27th edition of Cairo Opera House's annual Citadel Music Festival in Saladin Citadel, Cairo, Egypt, Aug. 13, 2018. Cairo's renowned Saladin Citadel was packed with Egyptian audience on Monday for a folk music concert held by the Forbidden City Chamber Orchestra of the Chinese Conservatory of Music. (Xinhua/Meng Tao)?