Aerial photo taken on July 9, 2017 shows the Hukou Waterfall of the Yellow River in Jixian county, North China’s Shanxi province.[Photo/Xinhua]

Aerial photo taken on July 9, 2017 shows the Hukou Waterfall of the Yellow River in Jixian county, North China’s Shanxi province.[Photo/Xinhua]

Aerial photo taken on July 9, 2017 shows the Hukou Waterfall of the Yellow River in Jixian county, North China’s Shanxi province. [Photo/Xinhua]