A tourist takes pictures beside the Qinghai Lake in Xining, capital of northwest China's Qinghai Province, Oct. 3, 2013. Qinghai Lake received numbers of tourists during the week-long National Day holiday. (Xinhua/Wu Gang)

People visit the Qinghai Lake in Xining, capital of northwest China's Qinghai Province, Oct. 3, 2013. Qinghai Lake received numbers of tourists during the week-long National Day holiday. (Xinhua/Wu Gang)

A child poses for photos beside the Qinghai Lake in Xining, capital of northwest China's Qinghai Province, Oct. 3, 2013. Qinghai Lake received numbers of tourists during the week-long National Day holiday. (Xinhua/Wu Gang)

Tourists take pictures beside the Qinghai Lake in Xining, capital of northwest China's Qinghai Province, Oct. 3, 2013. Qinghai Lake received numbers of tourists during the week-long National Day holiday. (Xinhua/Wu Gang)

A tourist takes pictures beside the Qinghai Lake in Xining, capital of northwest China's Qinghai Province, Oct. 3, 2013. Qinghai Lake received numbers of tourists during the week-long National Day holiday. (Xinhua/Wu Gang)