Big Sweet Potato

As the college entrance examination was approaching, one day, the clouds were overcast. Li Dongye fell asleep. He raised his head and looked at the black clouds. The clouds fell and black rain fell. Suddenly, he lost consciousness. When he opened his eyes again, a voice came from his mind: "Ding! It is detected that the host has regained consciousness. The human survival system in the end of the world has been activated." When the end of the world comes, become the human emperor to protect mankind! Or the king who commands billions of zombies? Welcome to the apocalypse!