September 20 th at 8: 25 p.m. Excuse me, friends, what is this phenomenon?

We also saw the same phenomenon in Zhangyi Town, Yuanzhou District, Guyuan City, Ningxia. That white disk is very strange. There is a little red dot flashing next to the south disk. In an instant, the disk expanded, moved westward, and subsided after a few minutes. At that time, people were very afraid. What kind of natural disaster was fear? Everyone has different opinions afterwards. I really hope the experts concerned can give an explanation.