Tourists take photos of a snow-covered forest in the Mordaga National Forest Park in the Greater Hinggan Mountains area of North China's Inner Mongolia autonomous region, Sept 27, 2011. [Photo/Xinhua]

People are wearing coats in Harbin city, capital of Northeast China's Heilongjiang province, Sept 29, 2011. A strong cold front hit the northern part of China, bringing lower temperatures and rain to some provinces. Heilongjiang province issued a cold front blue alert on Wednesday, as the temperature was expected to plunge 4 to 8 degrees in the next 48 hours. [Photo/Xinhua]