Why are there so many fighters flying over Xuzhou?

It is the normal flight training of the Air Force.

The Air Force will organize troops to train in weather suitable for organizing flight training, mainly to train aircraft to take off and land in the air, sail and coordinate, and practice skills and tactics. So this is a normal phenomenon, don't panic. In addition, as a national, we should also keep these information confidential, especially for residents living near the airport. Don't talk about the airport, let alone casually enter the airport. The motherland has peace and needs a strong air force and a strong national defense. There must be other concepts of confidentiality inside and outside.