Two passengers walk past cars which are covered by snow in Changchun, northeast China's Jilin Province, March 18, 2008. Snow hit Changchun after dust swept the northern city on Tuesday. (Xinhua Photo)

A man rides a bicycle on a street in Changchun, northeast China's Jilin Province, March 18, 2008. Snow hit Changchun after dust swept the northern city on Tuesday. (Xinhua Photo) A man rides a bicycle on a street in Changchun, northeast China's Jilin Province, March 18, 2008. Snow hit Changchun after dust swept the northern city on Tuesday. (Xinhua Photo)