A tourist takes a picture of the Qinghai Lake in northwest China's Qinghai Province, on July 21, 2009. As the boom season for tourism began, more and more tourists arrived here to enjoy the natural scenery. [Xinhua]

Tourists are seen beside the Qinghai Lake in northwest China's Qinghai Province, on July 21, 2009. As the boom season for tourism began, more and more tourists arrived here to enjoy the natural scenery. [Xinhua]