Travel Back in Time and Be the Savior in Your Own Novel

The novel is about the struggle for dominance between a low-pollution world and a technological society. The low-pollution world dominates mankind, and they advocate that everyone learns superpowers. The Ministry of Science and Technology went underground. People in the low-pollution world use heavy-handed tactics to suppress people in the Ministry of Science and Technology. The male protagonist traveled through time in his own novel and became the savior.