Swans dweel on the snowy lakeside of Rongcheng Swan Lake in Weihai, east China`s Shandong Province, Dec. 15, 2010. (Xinhua/Wang Fudong)

Swans enjoy their time at the snowy lakeside of Rongcheng Swan Lake in Weihai, east China`s Shandong Province, Dec. 15, 2010. (Xinhua/Wang Fudong)

People give food to swans at the snowy lakeside of Rongcheng Swan Lake in Weihai, east China`s Shandong Province, Dec. 15, 2010. (Xinhua/Wang Fudong)

A swan flies over Rongcheng Swan Lake in Weihai, east China`s Shandong Province, Dec. 15, 2010. (Xinhua/Wang Fudong)

Photo taken on Dec. 15, 2010 shows a scene of Rongcheng Swan Lake in Weihai, east China`s Shandong Province. (Xinhua/Wang Fudong)