As temperatures drop in Changbai Mountain Scenic Area in Yanbian county, Jilin province, Tianchi Lake begins to freeze. [Photo by Han Jinxiang/For chinadaily.com.cn]

As temperatures drop in Changbai Mountain Scenic Area in Yanbian county, Jilin province, Tianchi Lake begins to freeze. [Photo by Han Jinxiang/For chinadaily.com.cn]