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Tourists visit the Zhangye National Wetland Park in the Ganzhou District of Zhangye, northwest China's Gansu Province, Sept. 5, 2018. (Xinhua/Tao Ming)
Tourists visit the Zhangye National Wetland Park in the Ganzhou District of Zhangye, northwest China's Gansu Province, Sept. 5, 2018. (Xinhua/Tao Ming)