Delicate filigrees of rime cover trees on the Laotudingzi Mountain in Linjiang city, Northeast China's Jilin province, Dec 13. Rime is a special type of frost – granular tufts of ice – that appears only when atmospheric conditions are right and water vapor meets cold air. [Photo by Jin Guangshan/For gojilin.gov.cn]

This enchanting aerial view of trees blanketed in crystal clear rime on Laotudingzi Mountain in Jilin province. In autumn and winter, mist condenses to form frost, which engulfs the surrounding branches when it's extremely cold, creating this natural phenomenon. [Photo by Jin Guangshan/For gojilin.gov.cn]

Tourists pose for a group picture on the rime-covered Laotudingzi Mountain in Jilin province, Dec 13. [Photo by Jin Guangshan/For gojilin.gov.cn]

Trees are progressively coated with layers of rime on Laotudingzi Mountain in Jilin province, Dec 13. [Photo by Jin Guangshan/For gojilin.gov.cn]