People take videos of a flag-raising ceremony during smog at Tiananmen Square in Beijing

People take videos of a flag-raising ceremony during smog at Tiananmen Square in Beijing

People take videos of a flag-raising ceremony during smog at Tiananmen Square after a red alert was issued for heavy air pollution in Beijing, China, December 20, 2016. REUTERS/Jason Lee

December 21, 2016 4:53 PM (UTC+8)