On January 1, 2022, doomsday came to the earth, and the whole world would be exterminated.
Jack was accidentally reborn three months ago.
Knowing that the end of the world was coming, he immediately began to build a refuge.
He also activated the Doomsday Survival System, which could help him constantly upgrade his refuge.
The bulky iron door had been upgraded to a titanium alloy fire-resistant insulated door!
The brick concrete walls had been upgraded to special space metal walls!
The power system, pipeline system, material storage system, and active defense system had all been upgraded.
Jack's refuge was as complete and elaborate as a space station!
When the other survivors were still struggling to survive in the ruins of the apocalypse, they suddenly saw a huge refuge.

When Doomsday Comes, I Can Upgrade My Refuge Infinitely

Jack, who was in the refuge, stopped working on that day and paid attention to the situation in the Union.


With the help of Thinking, Jack could clearly see what had happened in the Union through the large screen in the living room.


Seeing the rocket made by the Union appear on the live broadcast, Thinking couldn't help but say a few more words.


"The Union rocket is completely made of a special metal that has been removed from the bodies of the mutants underground." Thinking had a sharp mind. He could tell the material of the rocket from the screen.


"So is the purpose of using this metal to make the whole rocket lighter?" Jack asked instinctively.


"No, no, no, this kind of metal is to make the structure of the whole rocket more stable and ensure its security," Thinking explained.


The purpose of the Union government landing on Mars this time should not be speed, but stability!


Chapter 211 Found Forerunners on Mars