A Tibetan Buddhist believer walks around the Potala Palace for praying in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2016, during the Saga Dawa Festival to commemorate the birth, enlightenment and death of Sakyamuni. (Xinhua/Jigme Dorje) 

Tibetan Buddhist believers walk at the Ramoche Temple for praying in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2016, during the Saga Dawa Festival to commemorate the birth, enlightenment and death of Sakyamuni. (Xinhua/Liu Dongjun) 

A Tibetan Buddhist believer walks for praying in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2016, during the Saga Dawa Festival to commemorate the birth, enlightenment and death of Sakyamuni. (Xinhua/Purbu Zhaxi)

Tibetan Buddhist believers walk at the Ramoche Temple for praying in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2016, during the Saga Dawa Festival to commemorate the birth, enlightenment and death of Sakyamuni. (Xinhua/Liu Dongjun) 

Tibetan Buddhist believers walk around the Potala Palace for praying in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2016, during the Saga Dawa Festival to commemorate the birth, enlightenment and death of Sakyamuni. (Xinhua/Jigme Dorje) 

Tibetan Buddhist believers light butter lamps for praying in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2016, during the Saga Dawa Festival to commemorate the birth, enlightenment and death of Sakyamuni. (Xinhua/Purbu Zhaxi) 

Pilgrims pray at the entrance of the Jokhang Temple in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2016, during the Saga Dawa Festival to commemorate the birth, enlightenment and death of Sakyamuni. (Xinhua/Zhang Rufeng)