A male Tibetan antelope walks at the Hoh Xil Nature Reserve in northwest China's Qinghai Province, Oct. 24, 2009. The Nature Reserve, in the hinterland of the Qinghai-Tibet Plateau, covers 45,000 square kilometres with an average altitude of 4,500 meters. The groups and population of wild animals including Tibetan antelope increased year by year in Hoh Xil thanks to the anti-poaching efforts in recent years. [Hou Deqiang/Xinhua]