Tourists visit the Hukou Waterfall of the Yellow River in Jixian county, North China’s Shanxi province, March 30, 2019. [Photo/Xinhua]

A child poses in front of the Hukou Waterfall of the Yellow River in Jixian county, North China’s Shanxi province, March 30, 2019.[Photo/Xinhua]

The picture of the Hukou Waterfall of the Yellow River in Jixian county, North China’s Shanxi province, taken on March 30, 2019. [Photo/Xinhua]

Tourists visit the Hukou Waterfall of the Yellow River in Jixian county, North China’s Shanxi province, March 30, 2019. [Photo/Xinhua]