People watch Tibetan opera performance at Norbulingka Park in Lhasa, capital of Southwest China's Tibet Autonomous Region, Aug. 12, 2018. The Shoton Festival, or Yogurt Festival, was held here from Aug. 11 to 17, attracting many tourists. (Photos: Xinhua/Jigme Dorje)

Tourists pose for photos at Yamdrok Lake in Southwest China's Tibet Autonomous Region, Aug. 13, 2018. The Shoton Festival, or Yogurt Festival, was held here from Aug. 11 to 17, attracting many tourists.