Tourists visit the Gahai lake wetland in Luqu County of Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province, July 18, 2017. (Xinhua/Chen Bin)
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Tourists visit the Gahai lake wetland in Luqu County of Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province, July 18, 2017. (Xinhua/Chen Bin)