Tourists visit NW China's Qinghai Lake Tourists visit Qinghai Lake in northwest China's Qinghai Province, April 30, 2012. (Xinhua/...

Tourists visit NW China's Qinghai Lake

Tourists visit Qinghai Lake in northwest China's Qinghai Province, April 30, 2012. (Xinhua/Wu Gang)

Tourists walk along the Qinghai Lake in northwest China's Qinghai Province, April 30, 2012. (Xinhua/Wu Gang)

Tourists visit Qinghai Lake in northwest China's Qinghai Province, April 30, 2012.