Photo taken on July 15, 2013 shows an ethnic tourist spot beside the Qinghai Lake in Northwest China's Qinghai Province. Qinghai Plateau attracts many tourists for its brisk weather in summer. (Xinhua/Yang Shoude)

Two tourists play beside the Qinghai Lake in Northwest China's Qinghai Province, July 15, 2013. Qinghai Plateau attracts many tourists for its brisk weather in summer. (Xinhua/Yang Shoude)

Tourists enjoy the scenery of rape flowers in Menyuan Hui Autonomous county in Northwest China's Qinghai Province, July 17, 2013. Qinghai Plateau attracts many tourists for its brisk weather in summer. (Xinhua/Yang Shoude)

A tourist enjoys the scenery beside the Qinghai Lake in Northwest China's Qinghai Province, July 15, 2013. Qinghai Plateau attracts many tourists for its brisk weather in summer. (Xinhua/Yang Shoude)