Doom: I have a fortress and a puppet army!

Su Chen resigned and returned to the small county town. He received a call from Qingmei, saying that the end of the world was coming and asked him to stock up on supplies and not go out.
Others did not believe it, but he was different. After he hung up the phone, he took out a small loan and bought a large amount of food, drinking water, various steels, weapons, and renovated his small villa in the countryside.
The next day, blood rain covered the world.
The end of the world is coming.
Countless living people turned into zombies, and evil spirits bred and evil beasts ran rampant.
"The day of heaven's change is coming."
Su Chen activated the fortress, built puppet guards, collected materials, continuously upgraded the fortress, and built a puppet army.
When the awakened extraordinary people, who had not taken a bath for three days, were still risking their lives to collect supplies in convenience stores, Su Chen was leading the second-level puppet guards to rob large supermarkets and use large barrels of pure water for bathing.
When the extraordinary organization was still happy to hunt a high-level evil beast, Su Chen stepped on the head of the lord-level evil beast and was thinking about where to tie the dog chain.
When the top extraordinary people found their way to the top, Su Chen had already stood on the top, with a group of terrifying extraordinary guards beside him, and a sky fortress like a floating island, which could not be taken down by billions of zombies.
(This book is also known as: Su Gou Gou's Doomsday Adventure, the Growth Diary of Doomsday Lord Su Gou Gou.)
[Zombie Doomsday, Gradually Upgrading, Weird Doomsday, Evil Beast Doomsday, Invading the Purgatory World]