I Have an Apocalypse Summoning System

Fifty years ago, the humans of Blue Star unexpectedly received a greeting from the distant reaches of space. Fifty years later, just as humanity eagerly awaited contact with extraterrestrial civilizations, a meteor shower arrived. Nine enormous meteorites, each as massive as a star, crashed down upon the nine regions of Blue Star. From that moment on, humanity entered the age of zombies, and all life fell silent! But that was not the most terrifying part. The most terrifying thing was the arrival of alien races decades later. Where would humanity go from there? Nan Ming, a researcher from fifty years in the future, unexpectedly carried the last hope of humanity back to fifty years earlier, to the first day of the world's transformation. Faced with a world on the verge of collapse, where would he go from there?