Photo taken on Dec. 7, 2017 shows the rime scenery of the Songhua River in Jilin City, northeast China's Jilin Province. 

The frost, also known as "Wusong", or rime, usually appears during winter in the areas surrounding the Songhua River. This unusual phenomenon is the result of interaction between the cold air and warm vapor from the nearby river.

Beautiful rime in Jilin is regarded as one of China's four natural wonders along with the landscape of mountains and waters in Guilin, Guangxi Zhuang Autonomous Region, the Stone Forest in Yunnan province, and the Three Gorges along the Yangtze River. [Photo/VCG]