A monk in Labrang monastery, Xiahe (Tibetan name Labrang). He is carrying his yellow hat (part of the <a href="http://en.wikipedia.org/wiki/Gelug"?>Gelugpa</a> sect of Tibetan buddhism). In the background you can see prayer wheels which are spun clockwise to release the prayers that are written on paper and packed inside them.
The most common prayer is <a href"http://en.wikipedia.org/wiki/Om_mani_padme_hum&... mani padme hum"</a> which means “hail to the jewel in the lotus” and is the mantra of the bodhisattva of compassion. The Dalai Lama is believed to be the reincarnation of the bodhisattva of compassion.