Li Chen had been a little confused at first, but Noah's reminder suddenly made him realize.
The Star-Level Shelter was currently at evolution level thirty—Thirty Stars.
Its barriers had an average thickness of 55 kilometers.
Their maximum thickness was nearly 80 kilometers.
The thickness of those barriers even exceeded the length of many small and medium Star Destroyer Motherships.
That was where the ultra-high-power and high-power Energy Detection Radars were stored.
As well as other equipment that consumed enormous amounts of energy.
The Star-Level Shelter had been built from extraordinarily complex and powerful composite metal materials.
It naturally possessed exceptional abilities to block all kinds of radiation.
Those barriers were so thick.
Not merely to prevent invasions by external enemies.
They also served to isolate and protect the various internal zones from one another.
This ensured that, when conducting activities involving high-energy radiation,
the radiation would not affect the residents inside the Star-Level Shelter.
In other words,
even this high-energy radiation could not spread freely within the Star-Level Shelter.
It was even less likely to spread outside and be detected by enemies.
Not to mention that, aside from its overall structure,
the Star-Level Shelter naturally possessed the ability to isolate all kinds of energy radiation.
Its surface was also protected by a total of three layers of Super Bio-Energy Shields.
The first layer, and the one closest to the surface of the Star-Level Shelter,
was the Super Bio-Energy Shield.
It could directly block living beings and all kinds of biological energy.
The moment a target attempted to force its way in, an alarm would automatically be triggered.
This Super Bio-Energy Shield also had powerful properties that prevented energy radiation from spreading.
Li Chen had personally added this layer back then.
He could freely control this barrier in one direction, making