Photo taken on Nov. 21, 2010 shows the hydrographic network of "za a qu", riverhead of the Lancang River, in Nangqian County of Yushu Tibetan Autonomous Prefecture, northwest China's Qinghai Province. (Xinhua/Wu Guangyu)
Photo taken on Nov. 21, 2010 shows the hydrographic network of "za a qu", riverhead of the Lancang River, in Nangqian County of Yushu Tibetan Autonomous Prefecture, northwest China's Qinghai Province. (Xinhua/Wu Guangyu)