Post-Catastrophe Era: I Am in a Parallel Plane

Space bandits? Records of the invasion of civilization by shape-shifting creatures are incomplete, and the underground city, humanity's last hope, is facing an unprecedented crisis in the 200-year underground era! The mystery of the life experience of Yu Fan, a once-in-a-hundred-year-old genius with a 99% fit for Alpha Armor. What will be the outcome of opening up the parallel world and the unique system possessed by Fan? What is the connection between the real world and the parallel world? The whole story is logically rigorous and online, rejecting mindless and cool writing. The villain will not lower the intelligence of the protagonists. The IQ is online to satisfy your desire for science fiction.