Overlooking Beijing｜The "Beijing Blue"

From the “APEC Blue” that has been a hit among friends who use Wechat to the “Winter Olympics Blue” that astonished the world, from the low PM2.5 concentration of 1 microgram per cubic metre during the 20th Party Congress to the decade-low level of PM2.5 concentration in 2022 – these are epitome of Beijing’s 10-year effort to improve air quality. Do you know why the blue sky in Beijing is hailed by the United Nations Environment Programme as the “Beijing Miracle”? Let’s take a look from above at the “Beijing Blue” that has become the new normal!