Isn't Yangzhou the UN Habitat Award? Why is the air quality not so good?

Yes, the honor won in 2006. Compared with other cities in Jiangsu, the environment and air quality in Yangzhou should be quite good. Maybe the weather you have seen these days is not very good, but it is the same all over the country. We live under the same blue sky, and it is not very effective to rely on a city or a region to protect environmental pollution. Only when all cities and regions in the whole society protect and manage the environment can the blue sky be truly blue.