Qingdao and Dalian: Comparison of air quality and water quality?

Air quality changes from time to time and is directly related to weather conditions. If it is foggy or cloudy in Dalian and Qingdao, and it is sunny in Beijing and Shanghai, it is possible that Dalian and Qingdao will not be as good as Beijing. But that's not often the case. I have used mobile phone software to observe the pollution index in cities such as Beijing, Shanghai, Dalian, and Qingdao for a long time. Dalian is still relatively better, but I cannot rule out that it will reach nearly 200 on some days. It can be seen that the air quality across the country is worrying. ah! I dare not say much about water quality. Without investigation and research, I have no right to speak. Dalian has now become a chemical city, and its air and water quality are declining.

Dalian and Qingdao are actually very similar. Whether it is suitable for living or not depends on personal preference. If you go to these two cities and live in each for a week, I believe you will have an idea.