The Hukou waterfall is located on the border area between north China's Shanxi and northwest China's Shaanxi provinces. (Photos: Xinhua)

Tourists view the winter scenery of the Hukou Waterfall scenic spot in Jixian County, north China's Shanxi Province, Dec. 9, 2020.

Photo taken on Dec. 9, 2020 shows the winter scenery of the Hukou Waterfall scenic spot in Jixian County, north China's Shanxi Province.

Tourists view the winter scenery of the Hukou Waterfall scenic spot in Jixian County, north China's Shanxi Province, Dec. 9, 2020.

Photo taken on Dec. 9, 2020 shows the winter scenery of the Hukou Waterfall scenic spot in Jixian County, north China's Shanxi Province.