Heavy smog has led to closed highways in northeast China on Saturday and Sunday, according to local authorities.
A heavy smog shrouded Northeast China's Harbin city on Monday for the second straight day, forcing the closure of schools and highways.
Pollution creates risk for kids and the elderly
Beijing shrouded in heavy smog
Car-Free Day gains momentum in China
New action plan gets tougher on air pollution control
Beijing on Monday unveiled a package of measures to curb vehicle emissions over the next five years as part of the its increasing efforts to improve air quality.
Beijing vows to reduce PM 2.5 density by 25%
People with respiratory issues usually get a break in the summer, but after Beijing's spell of smog in June, more and more are finding anything but relief.