originally thought that the luck in front of his house was stepped on, but in the end, he found that it was someone else's leftover watermelon skin that was thrown at the door of his house, Nie Yun's mood was complicated......

Moon: "......" (You're the melon!) ）

But these new discoveries are not the biggest gains.

"Since there are so many sub-bases, then according to common sense, there should also be a main base, which is responsible for unified scheduling and transporting the mined energy crystals, so near this main base, there should be a transportation channel directly to the surface of the moon!

So...... The location of this main base ......" Nie Yun's gaze began to wander over the unfinished model of the moon core.

The complex tunnels of the mine are like branches that wind and fork, some of which are thinner and come to an abrupt end after a short stretch, while others are thicker and connect many smaller passages like main roads.

Nie Yun's gaze slowly followed several of the thickest main roads, and as his mind turned, a large number of scattered searching "space spies" began to gather on several main roads, and then flew like locusts to scan.

With this change in search methods, the speed of modeling on several main roads on the holographic projection has increased at a rate that is visible to the naked eye......

Half an hour later, all the main roads lit up on the holographic model gradually spread in one direction, and finally converged at one point!

A large number of searched "space spies" poured into this meeting point, and then fell to the ground one after another, gathering sand into a tower and reconverging into a human figure.

In the flash of silver light, Nie Yun's face appeared, and the clone descended again!

"Wow! It's spectacular! Nie Yun looked at the scene in front of him and couldn't help but let out a sigh of admiration.

It is a huge space with a semi-circular dome, up to a height of hundreds of kilometers, and looks like a small world in the round sky.

And in the center of this small world, there is the remains of a huge underground base.

The construction style is the same as the previous sub-base, but the scale is more than dozens of times that of the sub-base, and there are several new buildings with strange shapes in the base.

The base is densely packed with various pipelines, and all kinds of functional buildings are arranged in a tight and orderly manner, in addition, what is very eye-catching is the ring of hemispherical hollows around the base.

Nie Yun counted them, there were twenty in total, and after he scanned them, he found that the size of these hemispherical cavities was exactly the same as the size of the cavities in the center of the mining sub-base!

"It seems...... This should be the parking space for one of those mining vehicles! However, the number is less than the total number of mining bases, so the spherical mining vehicles should take turns to hand in the ore, or maintain it, right? ”

He turned his head to look at a very eye-catching huge spherical steel skeleton inside the base, with various strange-shaped mechanical arms and construction tools on it, Nie Yun compared the size, it seemed to be slightly larger than the spherical mining vehicle at the base.

"This is supposed to be a manufacturing and repair plant for spherical mining vehicles?" Nie Yun touched his chin and guessed.

He looked around the base and saw that he didn't find any defensive weapons, so he slowly approached, until he entered the base, and there was no attack reaction, and he began to visit the alien mining base with confidence.

The basic construction unit here is also a small ant robot, which also has a robot manufacturing plant, but the key information components of the growth line are also missing.

Then Nie Yun followed the energy pipeline and found their energy supply building......

"Hmm...... This is supposed to be the energy hub? Nie Yun looked at a hexagonal slot on the high platform in the center of the building, but what did they use as an energy source? It's not like nuclear power......

His heart suddenly moved, the energy crystals here are so abundant, the other party can't use other fuel, right?

So Nie Yun went out and came back here after nearly half an hour, and there was already an extra hexagonal red energy crystal in his hand!

That's right, Nie Yun just went out ...... "eat soil"!

Nie Yun aimed the energy crystal in his hand at the energy center and inserted it.

"Weng!" The entire base seemed to shake for a moment, and then the base seemed to come to life, and the machinery and equipment inside the various functional buildings began to be supplied with energy, and various indicators lit up.

However, the lights of some buildings have just turned on and then turned off again, apparently in disrepair, and the equipment has deteriorated and is unusable.

However, at this moment, Nie Yun had been completely attracted by the eight vertical lasers erected upwards in the center of the base.

These eight lasers are like forming a tower, shining directly on the central dome, and there ...... Nie Yun saw a deep black hole......

……

Inside the Earth base.

"The best place to observe the Earth?" Yu Lao looked at the code name in front of him in surprise.

"Yes, this is your next research topic, and the astronomical data and computational support you need can be supplied in unlimited quantities!" Suspended codename projection channel.

"Well, if the boss is looking for the best place to observe the earth, what are the three conditions?" Yu Lao was puzzled.

Codename, or Nie Yun, the subject given to Yu Lao is "to find the best position to observe the earth under the following three conditions!" ”

Condition 1: The observer used has detection equipment far beyond Earth technology, allowing for bold assumptions.

Condition 2: The observation location can collect information about the Earth in great detail.

Condition 3: It is very hidden and difficult to detect after camouflage.

Yu Lao looked at it inexplicably, this is not like looking for the best observation position, but like looking for the detector, right?

"Insufficient permissions! Can't answer! ”

Yu Lao: "......"

Looking at this inexplicable condition, Yu Lao thought of the original intention of the establishment of the SOS organization, and he had a faint guess in his heart, which made his heart beat faster......

Could it be that this is ...... Looking for an alien probe?

Thinking of this possibility, the hot blood in Yu Lao's body involuntarily began to boil.

"First of all, I need a model of the solar system!" Yu Lao tentatively said to Zhi Brain.

"Brush!" The lights in the whole room suddenly dimmed, and then the stars lit up in front of the old man, as if he was in the universe.

Then the major planets of the solar system appeared one by one, and even some comets and some asteroids that had been detected were also impressively listed.

"Shhh Yu Lao gasped.

I was originally going to be a computer 3D model, and you directly gave me a realistic holographic experience of 3Dmax, which is so touching!

is worthy of being the spokesperson of black technology, Captain Ghost!

"I also need the electromagnetic wave intensity attenuation curve, the Earth's atmospheric ionospheric signal reflection model, the atmospheric light deflection effect model......"

As he spoke, Yu Lao stared at the data stream and drawings that kept popping up, and then the whole person trembled with excitement.

It's heaven...... A paradise for researchers!