By Liu Yi, Kou Jiangze, People’s Daily There have been significantly more “blue sky” days over recent years, said Zou Yi, a Beijing citizen. Since 2013, Zou has taken photos of the sky at a fixed spot in Beijing’s Chaoyang district every day, as a way to record the changes in air quality. So far, he has taken over 3,000 photos. “The city is getting more and more beautiful, which gives people a better mood,” he said. Heavy smog was once a big headache for Beijing citizens. To cope withRead More