Transmigrating to the Apocalypse: Starting by Creating People

He suddenly transmigrated to Earth in what seemed like a parallel world, arriving in America. This world had no seven continents or five oceans; all the landmasses were joined together. Worse, a terrifying unknown virus had broken out, bringing zombies, hybrid beasts, and humanoid monsters. Humanity's path forward had veered completely away from its original course. Fortunately, Zeng Ning gained the Guardian Core System. It could create all kinds of powerful guards as well as brutal killing machines. He hid inside a fortress city protected by walls of steel, leaving everything to his guards as they swept all before them. Everything within his reach became his territory, and everyone he encountered became his servant. Perhaps conquering this world was his true goal.