Is the air in Chongqing getting better or worse in the last ten years?

First of all, I am from Chongqing, and I feel that the air in Chongqing has been getting better and better in the past 10 years. Coupled with the unique humid climate in Chongqing, I can still feel the fresh air in Chongqing, but the air quality in some cities in Chongqing needs to be improved, such as Jiangjin, Yi Baishi and other industrial parks. Of course, it's worse than the northern cities. It's very good. I hope it's useful to you. - -~