A white ox wanders at the foot of Midui Glacier in Bomi County of Nyingchi Prefecture, southwest China's Tibet Autonomous Region, Sept. 19, 2011. Bomi County, located in the southeastern part of southwest China's Tibet Autonomous Region, is a place famous for its biological diversification. The county attracts many tourists every year with its glaciers, grand canyons, forests and geological parks. [Photo/Xinhua]

Photo taken on Sept. 19, 2011 shows Midui glacier in Bomi County of Nyingchi Prefecture, southwest China's Tibet Autonomous Region, Sept. 19, 2011. Bomi County, located in the southeastern part of southwest China's Tibet Autonomous Region, is a place famous for its biological diversification. The county attracts many tourists every year with its glaciers, grand canyons, forests and geological parks. [Photo/Xinhua]

Horses graze at the foot of Midui Glacier in Bomi County of Nyingchi Prefecture, southwest China's Tibet Autonomous Region, Sept. 19, 2011. Bomi County, located in the southeastern part of southwest China's Tibet Autonomous Region, is a place famous for its biological diversification. The county attracts many tourists every year with its glaciers, grand canyons, forests and geological parks. [Photo/Xinhua]

Photo taken on Sept. 19, 2011 shows a glacier near Bomi County of Nyingchi Prefecture, southwest China's Tibet Autonomous Region, Sept. 19, 2011. Bomi County, located in the southeastern part of southwest China's Tibet Autonomous Region, is a place famous for its biological diversification. The county attracts many tourists every year with its glaciers, grand canyons, forests and geological parks. [Photo/Xinhua]