Traveling to Britain in the 1980s, Jon Hart was prepared to study hard, work hard in scientific research, and fight for socialist modernization all his life in the future. He didn't want a letter from Hogwarts to disrupt all his plans .What is the cruelest thing for a traversal student who is ready to devote himself to scientific research and has carefully planned for more than ten years? That is to tell him that this world is not only unscientific, but magical!