Simply understand the origin of rime island's name.

Wusong Island is named for its beautiful rime. The terrain here is lower than that in Jilin city, and it is surrounded by rivers. Cold and hot air meet here, and trees hang almost every day in winter, sometimes they don't fall for days.

rime is an ice crystal in which fog and water vapor condense on branches and leaves when they are cold, and it can be divided into two types: granular and crystalline. Granular rime structure is compact, forming small ice cubes, while crystalline rime structure is relatively loose and large. The rime in Jilin is crystalline.