Tourists pose for photos at Hukou Waterfall of the Yellow River in Yichuan County, northwest China's Shaanxi provinces, May 18, 2018. (Xinhua/Zhao Jie)
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Tourists pose for photos at Hukou Waterfall of the Yellow River in Yichuan County, northwest China's Shaanxi provinces, May 18, 2018. (Xinhua/Zhao Jie)
