Photo taken on Aug. 15, 2013 shows the scenery of the Qinghai Lake in the Hainan Tibetan Autonomous Prefecture, northwest China's Qinghai Province. (Xinhua/Qiu Haiying)

Sheep eat grasses beside the Qinghai Lake in the Hainan Tibetan Autonomous Prefecture, northwest China's Qinghai Province, Aug. 15, 2013. (Xinhua/Qiu Haiying) Sheep eat grasses beside a ship near the Qinghai Lake in the Hainan Tibetan Autonomous Prefecture, northwest China's Qinghai Province, Aug. 15, 2013. (Xinhua/Qiu Haiying)

Sheep eat grasses beside the Qinghai Lake in the Hainan Tibetan Autonomous Prefecture, northwest China's Qinghai Province, Aug. 15, 2013. (Xinhua/Qiu Haiying)