The causes of dark circles.
After expert analysis, this black circle is caused by weather conditions. In the surrounding areas of Chengdu, the changes of temperature and humidity lead to the condensation of water vapor in the atmosphere into clouds, and this black circle is a special kind of cloud called "cloud circle".
counter-measure
Although this black circle looks scary, the public need not worry too much. Here are some countermeasures for you.
1. Calm down
Don't panic when you see this black circle. Keep calm and observe the situation around you.
2. Don't stare at the black circle
Black circle looks mysterious, but staring at it will make you feel dizzy and uncomfortable. So don't keep staring at the black circle.
3. Pay attention to your health
If you feel unwell, you can temporarily leave the observation range of the black circle and rest indoors.
final result
It is not a mysterious phenomenon that the sky in Chengdu is dark circles. Citizens don't need to worry too much. Just stay calm and pay attention to your health. If you still have questions about this black circle, you can consult relevant experts. I hope everyone can be safe and healthy!