Aerial photo taken on July 12, 2018 shows the Yellow River's Hukou Waterfall on the border area between north China's Shanxi and northwest China's Shaanxi provinces. (photo: Lv Guiming/Guangming Picture)
Aerial photo taken on July 12, 2018 shows the Yellow River's Hukou Waterfall on the border area between north China's Shanxi and northwest China's Shaanxi provinces. (photo: Lv Guiming/Guangming Picture)
Aerial photo taken on July 12, 2018 shows the Yellow River's Hukou Waterfall on the border area between north China's Shanxi and northwest China's Shaanxi provinces. (photo: Lv Guiming/Guangming Picture)
