Wei Zi's reincarnation novels

The novel you described may be Crazy, which is a novel with humorous elements and tells the story of a psychopath who claims to be a member of Heaven. During the onset, the protagonist thinks that he has all kinds of immortal identity and power. With the gradual strengthening of his power, his self-assertion has become more and more exaggerated, from the door god to the Emperor of Heaven. However, these are all his fantasies during the psychotic episode.

With the development of the story, the protagonist showed the identity of "heavenly soldier and heavenly general" in modern society, and later crossed to a place similar to the ancient world of cultivating immortals, claiming to be the reincarnation of the heavenly emperor. In this process, the protagonist is full of blind self-confidence and thinks that he will be able to achieve these grand goals in the future.

If you see this book at the starting point, you can try to search for "Psychopaths Are Crazy" at the starting point to see if it is the book you are looking for. If not, you can also try to search for keywords such as "heavenly soldiers and generals" and "gatekeepers" at the starting point to see if you can find the book you are looking for.