People visit the Hukou Waterfall of the Yellow River on the border area between North China’s Shanxi and Northwest China’s Shaanxi provinces, Aug 30, 2017. The water volume of Hukou Waterfall surged due to heavy rainfall at the upper reaches. [Photo/Xinhua]

People visit the Hukou Waterfall of the Yellow River on the border area between North China’s Shanxi and Northwest China’s Shaanxi provinces, Aug 30, 2017. The water volume of Hukou Waterfall surged due to heavy rainfall at the upper reaches. [Photo/Xinhua]

People visit the Hukou Waterfall of the Yellow River on the border area between North China’s Shanxi and Northwest China’s Shaanxi provinces, Aug 30, 2017. The water volume of Hukou Waterfall surged due to heavy rainfall at the upper reaches. [Photo/Xinhua]

People visit the Hukou Waterfall of the Yellow River on the border area between North China’s Shanxi and Northwest China’s Shaanxi provinces, Aug 30, 2017. The water volume of Hukou Waterfall surged due to heavy rainfall at the upper reaches. [Photo/Xinhua]