Tibetan antelopes graze near the Qinghai-Tibet railway in Hoh Xil, northwest China's Qinghai Province, March 11, 2016. The 1,956-kilometer-long Qinghai-Tibet railway, the world's highest altitude train line, has been put into service for 10 years. It links Lhasa, capital of southwest China's Tibet Autonomous Region, and Xining, capital of Qinghai Province in northwest China. [Photo: Xinhua]