What weather do the two circles between the upper and lower dotted lines represent?

The two circles in the middle of the upper and lower dotted lines represent haze weather. Haze is a combination of fog and haze. Smog is very common in cities. In many areas of China, fog and haze are combined as a disastrous weather phenomenon for early warning and forecasting, which is collectively called haze weather. Haze is the result of interaction between specific climatic conditions and human activities.