I Was Reborn and Changed My Life in Several Worlds

What would you do if you were born again? The ordinary Lan Nuo was attacked by a wild boar in his thirties while trying to save a little girl. When he opened his eyes again, he was back in elementary school. When he seized the opportunity and planned to live a good life, he discovered that he could use a computer to travel to other worlds. The future sci-fi apocalypse, the legendary immortal world, the parallel zombie crisis, the ancient martial arts arena, and the modern coexistence of humans and monsters. In each world, he can come and go freely and have different identities. In each world, he seems to be very powerful or the strongest, and there is even a world where modifiers can be turned on. What he doesn't know is that other worlds are quietly opening up, waiting for him.