Catty Catty Catty

As disaster was about to strike, a group of survivors transmigrated into a desolated world and were challenged to a game of survival. From terrifying acid rains, to endless natural disasters, the heavens burn while the earth scorches, radiation is rampant, and nobody is spared from the dangers of this hellscape. The only way one survives is by building a shelter and slowly upgrading it in hopes of surviving another day. 
Luckily, Su Mo awoke a Doomsday Survival System that allowed him to infinitely level up and upgrade his shelter! The main shelter wooden door can be upgraded into a metal door, which in turn upgrades into a composite gate; the wooden spears can be upgraded into bronze spears, which eventually upgrade all the way into electromagnetic spears... While everyone struggled to survive, Su Mo was fully loaded, and well equipped to dominate the post-apocalyptic world. 
"While some of us are lighting oil lamps, he's been using refrigerators!" 
"The walls in his shelter alone are tens of meters thick, it's the safest place on this planet."
"Before I die, I wish to spend one day in his shelter..."

EndlessFantasy Translation 

My Post-Apocalyptic Shelter Levels Up Infinitely!

LambSheepMutton

Upon stepping through into the ruins, both worlds were reversed.

The snowy wasteland disappeared, and the lush Hope Plains appeared.

Before Su Mo even had time to take in this amazing experience of suddenly being transported from point A to point B, he had already arrived in another world.

Since he had entered this place once already and the basics were already established, Su Mo was not sent to the grassy field to wait to be assigned but was transported straight to his own hut instead.

Moreover, this time the hut was obviously a huge improvement over the dilapidated little one from previously.

Every place the eye could see had been reinforced with heavy iron and even the doors had been replaced by large iron ones.

A Bombshell On The Market And An Epic-Quality Design Blueprint