Tibetan singers sing at the Potala Palace Square in Lhasa, southwest China's Tibet Autonomous Region, Aug. 3, 2015. Artists from Xinlianxin Art Troupe, organized by China's Central Television, started a tour in Tibet on Monday to mark the 50th anniversary of the establishment of Tibet Autonomous Region. [Photo: Xinhuanet]

Acrobats Wei Baohua and Wu Zhengdan perform at the Potala Palace Square in Lhasa, southwest China's Tibet Autonomous Region, Aug. 3, 2015. Artists from Xinlianxin Art Troupe, organized by China's Central Television, started a tour in Tibet on Monday to mark the 50th anniversary of the establishment of Tibet Autonomous Region. [Photo: Xinhuanet]

Singer Eva Huang sings at the Potala Palace Square in Lhasa, southwest China's Tibet Autonomous Region, Agu. 3, 2015. Artists from Xinlianxin Art Troupe, organized by China's Central Television, started a tour in Tibet on Monday to mark the 50th anniversary of the establishment of Tibet Autonomous Region. [Photo: Xinhuanet]

Singers Qu Dan, Hao Tian, Yi Liyuan and Yun Fei(from L to R) sing at the Potala Palace Square in Lhasa, southwest China's Tibet Autonomous Region, Aug. 3, 2015. Artists from Xinlianxin Art Troupe, organized by China's Central Television, started a tour in Tibet on Monday to mark the 50th anniversary of the establishment of Tibet Autonomous Region. [Photo: Xinhuanet]

Singers perform at the Potala Palace Square in Lhasa, southwest China's Tibet Autonomous Region, Aug. 3, 2015. Artists from Xinlianxin Art Troupe, organized by China's Central Television, started a tour in Tibet on Monday to mark the 50th anniversary of the establishment of Tibet Autonomous Region. [Photo: Xinhuanet]

Tibetan singers sing at the Potala Palace Square in Lhasa, southwest China's Tibet Autonomous Region, Aug. 3, 2015. Artists from Xinlianxin Art Troupe, organized by China's Central Television, started a tour in Tibet on Monday to mark the 50th anniversary of the establishment of Tibet Autonomous Region. [Photo: Xinhuanet]