With the help of the anti-gravity vehicle, Kungo and his party quickly fell towards the bottom of the deep hole.

Formally, of course, this should not be a deep hole, but rather a shaft.

"This should lead to the center of the earth!" After about ten minutes of descending, Kungo pursed his lips.

Every 300 meters or so, there will be an alloy gate, when Kunwu and they are still more than 50 meters away, the gate will open, and when Kunwu and the others have all passed, the gate will be closed again.

This means that the further down they go, the more they are imprisoned in the floodgates.

However, this is nothing to Kun Wu and the others, and it really can't be done with a single teleportation.

"Brother, we've just passed through the crust and entered the mantle!" Amber said suddenly.

Kungo looked down and found that there was still no bottom: "It seems that he is really going to run to the center of the earth." Everyone, get ready, let's speed up, it's not a way to fall like this! ”

Everyone adjusted their positions and activated the jetting function of the jetpack.

After a few dull sonic booms, the crowd broke through the speed of sound and rushed downward.

Those gates have extremely high sensitivity and opening speed, even if Kunwu and them break through the speed of sound, there will still be no oolong that directly hits the gate, which makes Kunwu who plans to directly hit a road out of the way disappointed.

After that, the speed of the crowd became faster and faster, and soon reached a speed of 2.5 Hz.

Heading towards the center of the earth at such a speed, the thrill of this can be imagined.

The Earth's mantle layer is 2,850 kilometers long, and it took almost an hour to cross the Gutenberg surface at a speed of 2.5 hertz.

As the group passed through the interface between the mantle and the core, the destination finally came into view.

It was a metal platform. It looks like something like a deep-sea drilling platform.

But its nature is clearly not.

From the perspective of planetary age, the Earth is still a fairly dynamic planet, with a core temperature of more than 5,000 degrees, coupled with extremely high pressure, this kind of environment is not resistant to the general starship alloy.

But the rig-like building in front of me stands safely.

"Brother, there's an isolation layer underneath!" Amber gestured to the bottom of the platform.

Kunwu and his party landed on the platform, and according to the test, it was found that the temperature on the platform was only 2,000 degrees.

It's too cool for what's going on inside the core. What's more, there is a shaft that leads to the surface, but the upper floors in the core have not rushed out, and the kilometers below the platform are the churning semi-molten nickel-iron fluid.

Kungo took a closer look, and only then did he realize the isolation layer that Amber was talking about.

It was a completely transparent "shell" that adhered to the platform less than ten meters below the platform.

The shell looked like glass, but it was clear that even the glass that the Golden Empire had taken refuge in would not have been able to do such an astonishing job in such an environment.

Obviously, it is this layer of crust that separates the heat and pressure of the earth's core.

Although it is not completely isolated, it is a key item in its existence.

"Brother, the scan is over!" Amber completes the scan of the surroundings and sends the results to Kungo.

In fact, it is not the shell that isolates the core, but the shell forms a "basement" covering an area of fifty square kilometers under the shaft.

Or call it an underground cave.

An underground cavern located above the Earth's core.

The platform on which Kungo and his party were standing was only a part of this underground cavern, in fact, the entire underground cave was full of such platforms.

But with the exception of Kungo, where they landed was made of starship alloy-grade metal, the platforms and buildings in the rest of the world were all made of the same material as shells.

That is, these things are completely transparent.

Therefore, Kungo and the others did not notice anything around them at first.

"These shells are not so much transparent as distorted vision. Brother, you have to go to the back and have a look, it's amazing! "Apo's scan was also completed. He is responsible for scanning the energy lines.

So Kungo called everyone and walked to the "room" that Awa was referring to.

A room that is completely invisible from the outside. Kungo just touched the door for five minutes, and at that moment he felt like he had been blind for decades.

When I finally found the door and entered, the scene in front of me was very different.

A neat and clean laboratory with an obvious black technology style.

Everything seen from the outside is transparent, and it is not an ordinary optical magnetic field invisible, but a more mysterious and advanced way.

But from the inside, everything is very normal, except for the equipment of unknown purpose, which is a very ordinary-looking laboratory.

"It's really different!" The people who stayed on the surface passed by the relay nodes along the way, and they saw everything Kunwu and them had gone through, and even Lao Bai couldn't help but sigh.

"Information correction. These shells have the ability to correct information, and the information they correct is invisible. It is invisible from the outside. Except for our information radar, there are no other methods at all! Awa explains why the shells of these buildings are so weird.

"So the shell that protects this place is not the same as the shell of these buildings?" Kungo raised an eyebrow.

"It's not the same. This kind of thing with the ability to correct information is not the same thing as long as its own information is different. But on the other hand, they are the same thing, but the amount of information correction is small, so they can't have the same characteristics at the same time! ”

Apo patiently explained: "The information correction of the material that forms the outermost shell is for high temperature and pressure, mainly for the purpose of strength and insulation!" Therefore, even though it is transparent, it can still be seen through polarized light, etc.! ”

"But the only information correction for these materials for building houses to the outside world is 'invisible', so except for the information level, it is invisible!"

"Different information statements of the same material have caused such a result, and for those who can control the transformation of information statements, this is the same substance, but for us, it is not indispensable to see two substances!"

Every time he came to this purely theoretical thing, Kungo had a toothache: "Okay, I don't care what the principle of this thing is. Just tell me, where is this wild black technology? I don't remember that the Empire had this kind of technology! ”

"Yes, but that's not how it works! So this shouldn't be Imperial technology, at least not pure! Apo said very seriously.

"You're finally here!"

At this moment, a voice suddenly rang out.