I have opened weapons store in doomsday

An opportunity that could have benefited mankind, because of an accident, became the ultimate weapon to destroy mankind.
Ordinary zombies with physical fitness equivalent to national first-class athletes, strange mutant zombies, mutant rats rampaging underground, mutant bird flocks that wantonly attack living things in the air, and deep-sea creatures that humans simply cannot deal with.
The appearance of these monsters has dealt a huge blow to humans. Major cities around the world have fallen one after another. In order to resist, humans have to use nuclear weapons, but the result is that due to nuclear radiation, humans have created more difficult nuclear mutant zombies.
As zombies continue to mutate, humans retreat step by step, and can only form gathering places one by one, using the weapons in their hands to try their best to protect the gathering places from being broken by zombies.
Cai Wenjie, who had survived for ten years in the apocalypse, eventually died in the mouth of zombies. Perhaps God did not want the world to be destroyed like this. The dead Cai Wenjie came back to life and returned to the three days before the apocalypse. He also obtained an arms system, which allowed him to use points to exchange for various weapons to fight against the endless zombies.
Decades later
Facing the zombie tide that was surging like a tide, Cai Wenjie just said coldly.
"Start the attack!"
With Cai Wenjie's order, the armored forces composed of countless tanks, armored vehicles, and mechas began to counterattack the zombies.
The sky was also full of aerospace motherships, fighters, and bombers that obeyed Cai Wenjie's orders.
The final battle between humans and zombies began.


I am not author of this novel I am just translateing

this novel wil have least 500 to 600 chapters so please support