In 2021, Beijing recorded 288 days of good air quality, or 78.9 percent of the whole year, for good air quality, notably including 114 days meeting the highest air quality standard. The city has seen continuous improvement in its air quality. Beijing's progress in air pollution control has been hailed by the United Nations Environment Programme as "Beijing Miracle". Today, blue sky and white clouds have become the norm in Beijing.

The glass curtain wall of a tall building reflects the blue sky and white clouds. [Photo by Eric Marie Favreliere from France]

Beijing Telegraph Building under the blue sky [Photo by Eric Marie Favreliere from France]

Citizens take photos of one Corner Tower of the Forbidden City under the blue sky. [Photo by Eric Marie Favreliere from France]