A woman of Tibetan ethnic group rotates prayer wheel at a ceremony praying for the deceased in Yushu Tibetan Autonomous Prefecture, northwest China's Qinghai Province, April 14, 2011, the first anniversary of the Yushu Earthquake. About 900 monks from the three best known monasteries in Yushu -- Trangu, Gyegu and Renyak -- gathered at a hillside sky burial site in Gyegu town on Thursday, chanting sutras for about 1,000 quake dead who were cremated there last year. The 7.1-magnitude Yushu Earthquake, which occurred on April 14, 2010, claimed more than 2,200 lives. [Photo/Xinhua]

Monks chant sutras at a ceremony praying for the deceased in Yushu Tibetan Autonomous Prefecture, northwest China's Qinghai Province, April 14, 2011, the first anniversary of the Yushu Earthquake. About 900 monks from the three best known monasteries in Yushu -- Trangu, Gyegu and Renyak -- gathered at a hillside sky burial site in Gyegu town on Thursday, chanting sutras for about 1,000 quake dead who were cremated there last year. The 7.1-magnitude Yushu Earthquake, which occurred on April 14, 2010, claimed more than 2,200 lives. [Photo/Xinhua]

Monks attend a ceremony praying for the deceased in Yushu Tibetan Autonomous Prefecture, northwest China's Qinghai Province, April 14, 2011, the first anniversary of the Yushu Earthquake. About 900 monks from the three best known monasteries in Yushu -- Trangu, Gyegu and Renyak -- gathered at a hillside sky burial site in Gyegu town on Thursday, chanting sutras for about 1,000 quake dead who were cremated there last year. The 7.1-magnitude Yushu Earthquake, which occurred on April 14, 2010, claimed more than 2,200 lives. [Photo/Xinhua]