Photos taken on Nov. 28, 2009 shows trees coated with frost on the Songhua River in Jilin City, Jilin Province. Frost occurs when winter fog condenses on the branches and leaves of trees and freezes to form white ice crystals. The frost on the Songhua River is one of four natural wonders in China, as famous as the Guilin Mountains and Streams, Yunnan Stone Forest and the Three Gorges on the Yangtze River.

Photos taken on Nov. 28, 2009 shows trees coated with frost on the Songhua River in Jilin City, Jilin Province. Frost occurs when winter fog condenses on the branches and leaves of trees and freezes to form white ice crystals. The frost on the Songhua River is one of four natural wonders in China, as famous as the Guilin Mountains and Streams, Yunnan Stone Forest and the Three Gorges on the Yangtze River.

Photos taken on Nov. 28, 2009 shows trees coated with frost on the Songhua River in Jilin City, Jilin Province. Frost occurs when winter fog condenses on the branches and leaves of trees and freezes to form white ice crystals. The frost on the Songhua River is one of four natural wonders in China, as famous as the Guilin Mountains and Streams, Yunnan Stone Forest and the Three Gorges on the Yangtze River.

Photos taken on Nov. 28, 2009 shows trees coated with frost on the Songhua River in Jilin City, Jilin Province. Frost occurs when winter fog condenses on the branches and leaves of trees and freezes to form white ice crystals. The frost on the Songhua River is one of four natural wonders in China, as famous as the Guilin Mountains and Streams, Yunnan Stone Forest and the Three Gorges on the Yangtze River.

Photos taken on Nov. 28, 2009 shows trees coated with frost on the Songhua River in Jilin City, Jilin Province. Frost occurs when winter fog condenses on the branches and leaves of trees and freezes to form white ice crystals. The frost on the Songhua River is one of four natural wonders in China, as famous as the Guilin Mountains and Streams, Yunnan Stone Forest and the Three Gorges on the Yangtze River.

Photos taken on Nov. 28, 2009 shows trees coated with frost on the Songhua River in Jilin City, Jilin Province. Frost occurs when winter fog condenses on the branches and leaves of trees and freezes to form white ice crystals. The frost on the Songhua River is one of four natural wonders in China, as famous as the Guilin Mountains and Streams, Yunnan Stone Forest and the Three Gorges on the Yangtze River.

Photos taken on Nov. 29, 2009 shows trees coated with frost after a snowfall on Yuntai Mountain of Lianyungang City, east China's Jiangsu Province. Frost occurs when winter fog condenses on the branches and leaves of trees and freezes to form white ice crystals.

Photos taken on Nov. 29, 2009 shows trees coated with frost after a snowfall on Yuntai Mountain of Lianyungang City, east China's Jiangsu Province. Frost occurs when winter fog condenses on the branches and leaves of trees and freezes to form white ice crystals.

Photos taken on Nov. 29, 2009 shows trees coated with frost after a snowfall on Yuntai Mountain of Lianyungang City, east China's Jiangsu Province. Frost occurs when winter fog condenses on the branches and leaves of trees and freezes to form white ice crystals.

Photos taken on Nov. 29, 2009 shows trees coated with frost after a snowfall on Yuntai Mountain of Lianyungang City, east China's Jiangsu Province. Frost occurs when winter fog condenses on the branches and leaves of trees and freezes to form white ice crystals.

Photos taken on Nov. 29, 2009 shows trees coated with frost after a snowfall on Yuntai Mountain of Lianyungang City, east China's Jiangsu Province. Frost occurs when winter fog condenses on the branches and leaves of trees and freezes to form white ice crystals.

Photos taken on Nov. 29, 2009 shows trees coated with frost after a snowfall on Yuntai Mountain of Lianyungang City, east China's Jiangsu Province. Frost occurs when winter fog condenses on the branches and leaves of trees and freezes to form white ice crystals.

Agencies and Li Ming contributed to this story.