I'm Caught Between the Past and the Future

Li Dequan found that he had two real dreams. In the cyber past, he is the prosthetic doctor Li Sanque who was slapped due to a technical failure; in the future of cultivating immortals, he is the postman Li Wubi who was slapped by the postmaster for having diarrhea. The memories and emotions of the two worlds came to him simultaneously. He tried to use the "magical skills" in his dream to change reality, but sadly found that these techniques and magical skills didn't work, and even more despairingly found that only one of these three "Is" could survive.