Two mysteries in the history of China: Qin Shihuang met aliens and Wang Mang contacted aliens. What is the basis of this statement?

The reason why Qin Shihuang met aliens was because a book in the Eastern Jin Dynasty, The Record of Picking Up, described that Qin Shihuang met a country whose people looked very strange, just like the aliens recognized by people in today's society. This ship is also very strange, much like a spaceship. The statement that Wang Mang has been in contact with aliens is groundless, and it is all people's imagination. I don't think either of these statements is reliable.

First of all, this book was written by Wang Jia of the Eastern Jin Dynasty. Moreover, it has been a little long since the Qin Dynasty, and this book is not official in nature, which is a bit like today's novels. But there is a detailed description to the effect that a country called Wanqu sent an envoy to see Qin Shihuang. The messenger is ten feet tall, adorned with feathers of birds and animals, and invisible. More importantly, their eyes are prominent and glow at night. Qin Shihuang thought they were gods. For modern people, isn't this what we usually call aliens?

Wang Mang is a man with ideas. It is said that he invented a Dou Wei that can rotate with the rotation in the east, west, north and south directions. Is it novel? There are vernier calipers that we are all familiar with today. Copper calipers have existed since Wang Mang's time, and their functions are the same as those of vernier calipers today. It is said that they were invented by Wang Mang. Wang Mang also carried out many policies: for example, land belongs to the system, and people can't help asking, isn't this a unique system in modern society, and so can the ancients more than 2,000 years ago. Isn't this a coincidence?

To sum up, I think the civilization and intelligence of the ancients have been underestimated by modern people.