A tricyclist takes two children to school as dense fog shrouds Xingtai, a city in north China's Hebei Province January 4, 2007. Visibility was reduced to less than 100 meters, inflicting great difficulties to local residents. A traffic policeman maintains order on a street as vehicles manage their way. A car turns on its front fog lights to manage its way on a street.

(Xinhua News Agency January 5, 2007)