My Post-Apocalyptic Shelter Levels Up Infinitely!

massive underground building that stretched 80 meters underground.

The overall building structure was made of cement and steel bars, the middle layer was wrapped with heavy energy-absorbing iron stones, and the outermost layer was even heated insulation and cold insulation treated.

Regardless of its internal structure, the external structure alone was worthy of the word “outrageous”!

Inside, for the stability and rigidity of the underground building, the 80-meter building with a total of 48 floors consisted of numerous densely packed rooms that made Su Mo dizzy looking at the drawing.

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‘This…Who in the world is capable of building such a terrifying underground facility with manpower?’ Su Mo was stunned as he read through the description.

He turned the pages, went through the schematic illustration of the underground and shelter, and was utterly in awe.

In the wasteland, everyone started from scratch.

Su Mo only had a tortoise shell that they could utilize in the early days and an ordinary underground shelter with one floor.

The system’s upgrade was the bottom line.
After four months, Su Mo still felt that building a shelter had a long way to go.

He could not rush it.

There was no use in rushing it either.

Without advanced infrastructure abilities and sufficient infrastructure skills, the difficulty of underground construction was simply overwhelming!

‘There are still a lot of mysteries of the wasteland that I am unaware of.
This is impossible to achieve through manpower alone!’

Although the underground buildings were ranked, they were subjective by the author of the illustrated book.

For example, the equilateral triangle shelter in sixth place seemed weaker than the five that ranked before it in terms of stability and construction difficulty from Su Mo’s perspective.

Su Mo came to the last page of the book and saw the 100th underground shelter that was listed.

At a glance, he immediately understood that it was ten times stronger than his current underground shelter by more than a hundredfold!

The two were on completely different levels.

‘They’re so strong! It would take me two to three years to enter the top 100, even with the system’s help!

‘These people were probably the powerhouses and longest-living people of the last elite batch of people.’

The schematic illustrations of the top 100 underground shelters each had a high reference value and could widen Su Mo’s vision of shelter constructions.

Countless ideas regarding the construction of the underground shelters popped up in Su Mo’s mind almost immediately.

He was excited to realize his ideas in the New World.