Traffic flows smoothly during rush hours in downtown Beijing, capital of China, Dec. 19, 2016. Beijing activated its first red alert for smog this winter under which the "Odd-even" car restriction is in force, and additional public transportation has been arranged, with more buses running for longer. (Xinhua/Luo Xiaoguang)
Passengers queue to enter Shuangjing Subway Station on Line 10 during rush hours in Beijing, capital of China, Dec. 19, 2016. Beijing activated its first red alert for smog this winter under which the "Odd-even" car restriction is in force, and additional public transportation has been arranged, with more buses running for longer. (Xinhua/Luo Xiaoguang)
Passengers fill the transfer passage of Hujialou Subway Station on Line 10 during rush hours in Beijing, capital of China, Dec. 19, 2016. Beijing activated its first red alert for smog this winter under which the "Odd-even" car restriction is in force, and additional public transportation has been arranged, with more buses running for longer. (Xinhua/Luo Xiaoguang)
Passengers try to crowd into a subway train on Line 10 during rush hours in Beijing, capital of China, Dec. 19, 2016. Beijing activated its first red alert for smog this winter under which the "Odd-even" car restriction is in force, and additional public transportation has been arranged, with more buses running for longer. (Xinhua/Luo Xiaoguang)
Crowded passengers are seen in a subway train on Line 10 during rush hours in Beijing, capital of China, Dec. 19, 2016. Beijing activated its first red alert for smog this winter under which the "Odd-even" car restriction is in force, and additional public transportation has been arranged, with more buses running for longer. (Xinhua/Luo Xiaoguang)
