How Can Anyone Be Such a Dr. Zombie King?

[Villain + apocalypse + farming development + black revenge + hoarding supplies] Yuehan was reborn a week before the zombie crisis broke out, obtained the [most powerful brain], became Dr. Zombie King, and led the zombies to new glory. When humans wanted to wipe out all the zombies, they suddenly found that they could not defeat all kinds of weird zombies led by Yue Han. The zombies have just established a foothold on the earth, the secret realm of mountains and rivers is opened, and alien objects are coming from the sky. The world is showing its grandeur and depth to everyone. But at this time, Yuehan was busy planting sunflowers in his hometown...