In pictures: Tibetan nomads

"The old lama [Tibetan monk] will give us Tibetan medicine and herbal remedies. We place our trust in his advice," Jigme says.

"There are stores for medicine in town but nobody in our family who stays at the camp can read Chinese so we prefer to stick to what our lama tells us.

"We offer butter and yoghurt to the lama. He hasn't gone to town for years so doesn't have much use for paper money."