Tibetan Buddhists converge at Sera Monastery during a grand religious ceremony at Sera Monastery in the suburbs of Lhasa, capital of southwest China's Tibet Autonomous Region, on Feb. 14, 2008. The seven-day annual religious ceremony, started on the 8th of the New Year's first month according to Tibetan calendar, is to pray for world peace in the coming year. (Xinhua Photo)

Tibetan Buddhists debate on Buddhism scripture during a grand religious ceremony at Sera Monastery in the suburbs of Lhasa, capital of southwest China's Tibet Autonomous Region, on Feb. 14, 2008. (Xinhua Photo)

A butter lamp burns beside Tibetan Buddhists who debate on Buddhism scripture during a grand religious ceremony at Sera Monastery in the suburbs of Lhasa, capital of southwest China's Tibet Autonomous Region, on Feb. 14, 2008.  (Xinhua Photo) Tibetan Buddhists at Sera Monastery hold a grand religious ceremony in the suburbs of Lhasa, capital of southwest China's Tibet Autonomous Region, on Feb. 14, 2008. The seven-day annual religious ceremony, started on the 8th of the New Year's first month according to Tibetan calendar, is to pray for world peace in the coming year. (Xinhua Photo)