Soul exchange, and then Wei Zi.

According to your description, this novel may be three-body.

"Three-body" is a long series of science fiction novels created by Liu, which tells the information exchange, life-and-death struggle and rise and fall of two civilizations in the universe. The plot of "soul exchange" is an important plot in the novel, but it doesn't completely conform to your description. The protagonist in the novel did not study in school, but communicated and fought with alien civilization as an agent. If you want to know more about this novel, you can read the original text.