A mask is on show during an exhibition of Tibet's intangible cultural heritages, as part of the 2nd Tibet International Tourism and Culture Expo in Lhasa, capital of southwest China's Tibet Autonomous Region, Oct. 6, 2015. (Xinhua/Jigme Dorje)

Buddha statues are on show during an exhibition of Tibet's intangible cultural heritages, as part of the 2nd Tibet International Tourism and Culture Expo in Lhasa, capital of southwest China's Tibet Autonomous Region, Oct. 6, 2015. (Xinhua/Jigme Dorje)

Masks are on show during an exhibition of Tibet's intangible cultural heritages, as part of the 2nd Tibet International Tourism and Culture Expo in Lhasa, capital of southwest China's Tibet Autonomous Region, Oct. 6, 2015. (Xinhua/Jigme Dorje)

Potteries are on show during an exhibition of Tibet's intangible cultural heritages, as part of the 2nd Tibet International Tourism and Culture Expo in Lhasa, capital of southwest China's Tibet Autonomous Region, Oct. 6, 2015. (Xinhua/Jigme Dorje)

Costumes of Tibetan Opera are on show during an exhibition of Tibet's intangible cultural heritages, as part of the 2nd Tibet International Tourism and Culture Expo in Lhasa, capital of southwest China's Tibet Autonomous Region, Oct. 6, 2015. (Xinhua/Jigme Dorje)

Wooden sculptures are on show during an exhibition of Tibet's intangible cultural heritages, as part of the 2nd Tibet International Tourism and Culture Expo in Lhasa, capital city of southwest China's Tibet Autonomous Region, Oct. 6, 2015. (Xinhua/Jigme Dorje)