Transport networks jammed up by weather in northern China
Trains delayed, roads closed and flights cancelled as snow and ice combine with smog

Roads were closed, flights cancelled and trains delayed in northern China yesterday as the region was hit by snow, ice, fog and smog.
The international airport in Changchun , in Jilin province , had to be closed yesterday morning because of ice on the runways, Xinhua reported. About 40 flights were disrupted.
Snow and ice also forced the authorities to close highways in Songyuan and Baicheng in the province.
Tongliao airport in Inner Mongolia had to be closed at noon yesterday because of snow and ice.
Further north in Heilongjiang province , blizzards had swept through the cities of Harbin and Jiamusi , Xinhua said.
An expressway linking Harbin and Mudanjiang had to be closed and traffic restrictions were imposed on another highway linking the provincial capital and Tongjiang . About a dozen roads had been closed in Liaoning province since heavy snow started to fall on Friday, the authorities said.
In Beijing, roads were shut after visibility plummeted due to high air pollution. Snow eased yesterday morning in the capital, allowing smog to build up rapidly in the drier conditions.