Buddhists walk into the Sanyai Monastery, the first Buddhist temple in the history of Tibet region, to worship Buddhas during the Saga Dawa Festival, in Zhanang County of Shaanan City, southwest China's Tibet Autonomous Region, May 21, 2016. The Saga Dawa Festival, which honors the life of Buddha, is celebrated on the 15th day of the 4th Tibetan month and is one of the most important religious festivals celebrated in Tibet. Buddhists on this day usually goes to temples, raise a prayer pole and light butter lamps. (Xinhua/Liu Dongjun) 

 Buddhists burn mulberry twigs as they worship Buddhas at the Sanyai Monastery, the first Buddhist temple in the history of Tibet region, during the Saga Dawa Festival, in Zhanang County of Shaanan City, southwest China's Tibet Autonomous Region, May 21, 2016. The Saga Dawa Festival, which honors the life of Buddha, is celebrated on the 15th day of the 4th Tibetan month and is one of the most important religious festivals celebrated in Tibet. Buddhists on this day usually goes to temples, raise a prayer pole and light butter lamps. (Xinhua/Liu Dongjun)

Buddhists add butter on a butter lamp at the Sanyai Monastery, the first Buddhist temple in the history of Tibet region, during the Saga Dawa Festival, in Zhanang County of Shaanan City, southwest China's Tibet Autonomous Region, May 21, 2016. The Saga Dawa Festival, which honors the life of Buddha, is celebrated on the 15th day of the 4th Tibetan month and is one of the most important religious festivals celebrated in Tibet. Buddhists on this day usually goes to temples, raise a prayer pole and light butter lamps. (Xinhua/Liu Dongjun) 

 Buddhists worship Buddhas at the Sanyai Monastery, the first Buddhist temple in the history of Tibet region, during the Saga Dawa Festival, in Zhanang County of Shaanan City, southwest China's Tibet Autonomous Region, May 21, 2016. The Saga Dawa Festival, which honors the life of Buddha, is celebrated on the 15th day of the 4th Tibetan month and is one of the most important religious festivals celebrated in Tibet. Buddhists on this day usually goes to temples, raise a prayer pole and light butter lamps. (Xinhua/Liu Dongjun) 

 Buddhists worship Buddhas at the Sanyai Monastery, the first Buddhist temple in the history of Tibet region, during the Saga Dawa Festival, in Zhanang County of Shaanan City, southwest China's Tibet Autonomous Region, May 21, 2016. The Saga Dawa Festival, which honors the life of Buddha, is celebrated on the 15th day of the 4th Tibetan month and is one of the most important religious festivals celebrated in Tibet. Buddhists on this day usually goes to temples, raise a prayer pole and light butter lamps. (Xinhua/Liu Dongjun) 

Photo taken on May 21, 2016 shows the Sanyai Monastery, the first Buddhist temple in the history of Tibet region, during the Saga Dawa Festival, in Zhanang County of Shaanan City, southwest China's Tibet Autonomous Region. The Saga Dawa Festival, which honors the life of Buddha, is celebrated on the 15th day of the 4th Tibetan month and is one of the most important religious festivals celebrated in Tibet. Buddhists on this day usually goes to temples, raise a prayer pole and light butter lamps. (Xinhua/Liu Dongjun) 

A monk walks around a Buddhist tower at the Sanyai Monastery, the first Buddhist temple in the history of Tibet region, during the Saga Dawa Festival, in Zhanang County of Shaanan City, southwest China's Tibet Autonomous Region, May 21, 2016. The Saga Dawa Festival, which honors the life of Buddha, is celebrated on the 15th day of the 4th Tibetan month and is one of the most important religious festivals celebrated in Tibet. Buddhists on this day usually goes to temples, raise a prayer pole and light butter lamps. (Xinhua/Liu Dongjun)