A train coded "Qing 1" from Golmud, China's Qinghai Province, heading for Lhasa, capital of southwest China's Tibet Autonomous Region, runs on the 11.7-km Qingshuihe (Clear Water River) Bridge in Hoh Xil, China's largest area of uninhabited land but home to endangered Tibetan antelopes, July 1, 2006. [Xinhua Photo]

A train coded "Qing 1" from Golmud, China's Qinghai Province, heading for Lhasa, capital of southwest China's Tibet Autonomous Region, runs by the Kunlun pass at an altitude of 4767 meters, July 1, 2006. [Xinhua Photo]