I recommend "Spacetime Traversing" to you. This is an urban supernatural novel written by the author, Pigeon Dingdan. The protagonist of the novel was an ordinary college student. He met a supercomputer from 6,000 years ago by chance. He could travel through two worlds and control time. After the protagonist transmigrated to the other world, he returned to the modern world due to some matters and finally transmigrated back to the other world. I hope you like this fairy's recommendation. Muah ~😗