Heavy fog shrouds Zhengzhou, Henan Province

People walk past the "Feb. 7 Memorial Tower" which is shrouded by the fog in Zhengzhou, capital of central China's Henan Province, Jan. 16, 2013. Affected by a cold front, the haze which has lingered in most parts of Henan for the past two weeks will begin to disperse on Jan. 17, according to the meteorological authority. (Xinhua/Wang Song)