Vehicles run on a smog-shrouded road in Harbin, capital of northeast China's Heilongjiang Province, Oct. 25, 2016. Heavy smog hit the city on Tuesday. (Xinhua/Wang Kai)
Vehicles run on a smog-shrouded road in Harbin, capital of northeast China's Heilongjiang Province, Oct. 25, 2016. Heavy smog hit the city on Tuesday. (Xinhua/Wang Kai)