Did people in ancient times ever see UFOs?

The ancients had seen UFOs, such as Kuafu chasing the sun in Shan Hai Jing, which is called China's wonderful book, and the flying car in Shan Hai Jing. Aliens came to China during the Qin Shi Huang era, and Qin Shi Huang also saw aliens. There is such a record in the Collection of Notes that Wanqu people came by snail boat, which looks like a snail and sinks to the bottom of the sea, but the water is not immersed. A rough boat can sail to Wan Li every day without being soaked in water. Tie Xiaoer and Fei Xiaoer in Moon Hee in Tang Dynasty. Too much waiting!