Help, I Just Traveled Through Time and Turned into an Orange Cat

Lin Yu, a good law-abiding citizen in the 21st century, believed in science. However, on this day, his belief collapsed and he traveled to the world 1,000 years in the future. In the future, people will be affected by the Fourth World War and their bodies will be exposed to radiation. Even ordinary running will be regarded as a dangerous sport. "Look, he dares to run!" "I-I'll go, is this the sit-ups from ancient times!" "Why is this elementary school student so desperate that he dares to do pull-ups?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.