A boy wears a Tibetan Opera mask while watching performance during a cultural festival of the Tibetan Opera in Gyabrag Village under the Doilungdeqen District of Lhasa City, southwest China's Tibet Autonomous Region, Aug. 2, 2016. Eight art troupes of the Tibetan Opera from the Doilungdeqen District took part in the performance. (Xinhua/Zhang Rufeng)

Performers perform in a play during a cultural festival of the Tibetan Opera in Gyabrag Village under the Doilungdeqen District of Lhasa City, southwest China's Tibet Autonomous Region, Aug. 2, 2016. Eight art troupes of the Tibetan Opera from the Doilungdeqen District took part in the performance. (Xinhua/Zhang Rufeng)

Performers perform in a play during a cultural festival of the Tibetan Opera in Gyabrag Village under the Doilungdeqen District of Lhasa City, southwest China's Tibet Autonomous Region, Aug. 2, 2016. Eight art troupes of the Tibetan Opera from the Doilungdeqen District took part in the performance. (Xinhua/Zhang Rufeng)

 
Villagers gather together to watch performance during a cultural festival of the Tibetan Opera in Gyabrag Village under the Doilungdeqen District of Lhasa City, southwest China's Tibet Autonomous Region, Aug. 2, 2016. Eight art troupes of the Tibetan Opera from the Doilungdeqen District took part in the performance. (Xinhua/Zhang Rufeng)

Peformers make up during a cultural festival of the Tibetan Opera in Gyabrag Village under the Doilungdeqen District of Lhasa City, southwest China's Tibet Autonomous Region, Aug. 2, 2016. Eight art troupes of the Tibetan Opera from the Doilungdeqen District took part in the performance. (Xinhua/Zhang Rufeng)

Performers perform in a play during a cultural festival of the Tibetan Opera in Gyabrag Village under the Doilungdeqen District of Lhasa City, southwest China's Tibet Autonomous Region, Aug. 2, 2016. Eight art troupes of the Tibetan Opera from the Doilungdeqen District took part in the performance. (Xinhua/Zhang Rufeng)

A boy wears a Tibetan Opera mask while watching performance during a cultural festival of the Tibetan Opera in Gyabrag Village under the Doilungdeqen District of Lhasa City, southwest China's Tibet Autonomous Region, Aug. 2, 2016. Eight art troupes of the Tibetan Opera from the Doilungdeqen District took part in the performance. (Xinhua/Zhang Rufeng)

Performers perform in a play during a cultural festival of the Tibetan Opera in Gyabrag Village under the Doilungdeqen District of Lhasa City, southwest China's Tibet Autonomous Region, Aug. 2, 2016. Eight art troupes of the Tibetan Opera from the Doilungdeqen District took part in the performance. (Xinhua/Zhang Rufeng)