Genesis of the Apocalypse

(The story is set in 2080. By then, Blue Star has fallen to a zombie apocalypse, and humanity has built fortified base cities and formed powerful factions to fight back against the undead.

Wei Chen was a member of the Hunters' Alliance. Betrayed by his teammates during a mission, he unexpectedly came back to life and even acquired a "System?") In 2080, Blue Star has become a world overrun by zombies. It all began with the Source, whose first disaster turned the world into a zombie wasteland. What will happen when the next disaster strikes? Wei Chen was betrayed and killed in this world. Will he revive on the spot, or wake up in a parallel world? Will he choose to save this world, seek a life of pleasure, or look out only for himself? Not a saint / ruthless and decisive / one female lead / loyalty / somewhat feel-good / System / apocalypse / sci-fi / fantasy / reborn / no harem