The End of the World: I built the Supreme Shelter one year in advance

The wasteland era is coming. Fortunately, Xu Zhengyang got the doomsday survival system one year in advance, and built a supreme shelter from scratch in his basement!
Resident Evil!
Radiation wasteland!
Ice Age!
...
No matter what kind of natural disasters and changes occur in the outside world.
Xu Zhengyang's shelter always maintains a constant temperature, and it is like spring all year round;
The starch manufacturing factory always uses carbon dioxide to make starch;
The three-dimensional farm always has endless fresh fruits and vegetables;
The AI ​​automated workshop never stops, producing engineering robots, power armor, and swarm drones 24 hours a day...
Starting from scratch, build a supreme shelter that can withstand any natural disasters and man-made disasters;
Then upgrade step by step, and finally build the shelter into a planetary fortress that can sail in the sea of ​​stars, rushing towards the endless galaxy!
[Tags: no heroine, lone wolf, doomsday, shelter, upgrade]