A man takes photos for himself on the Tian'anmen Square in a clear windy day in Beijing, capital of China, Nov. 21, 2010. Beijing confronted a cold wave on Sunday with temperature predicted to drop to minus three degrees celsius at night. [Xinhua]

Tourists with face masks walk on the Tian'anmen Square in a clear windy day in Beijing, capital of China, Nov. 21, 2010. Beijing confronted a cold wave on Sunday with temperature predicted to drop to minus three degrees celsius at night. [Xinhua]