Beginning as a Boxer and Becoming Invincible at the End of the World

At the end of the world, the world is suddenly surrounded by a mysterious gray mist, and all living creatures infected will lose their minds. The surviving humans built bunkers on the ground to avoid the gray fog, and the world began the "Bunker Era." Chen Chuan was reborn as an ordinary boxer in "ZG1647 Bunker" and awakened the invincibility system, which made him stronger as long as he exercised. From [Running] to [Teleportation] that ignores distance; From [Bounce] to [Fly] that breaks the speed of light; From [Muay Thai] to [Invincible] that can kill with one punch; Chen Chuan had a bumpy journey along the way, but he never regretted it.