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

'What mysterious items do I have that can be combined with this thing?'

The system prompts were meaningful.

Su Mo scratched his head thinking about the strange things he obtained in the New World. Then, he abruptly stood up.

There were very few items with unknown properties that he had obtained.

There was only the pocket watch part with unknown properties, which he had found under Guan Shan's bed.

The system could not detect the properties because the ownership still belonged to Guan Shan. However, it did not prevent Su Mo from trying to test them.

Su Mo went to a safe inside the tent, quickly turned the wheel, and entered the password, causing a popping sound.

He raised his hand to open the door and took out the golden rope attached to a golden disc between the illustrated book he had frequently read the past two days.

It was the same result as before. He was still unable to use the system to analyze the small disc.

Magical Fusion! The Brand New Divulgence of Heaven’s Secret! Part 2