On the back of the three cube buildings, three huge pipes extend from the back path and plunge directly into the base at the back of each building, the surface of these pipes is extremely hard, Luo Xu pinched it with his hand, and Bob told him that it was an alloy pipe made of tungsten steel structure, and the hardness was almost the same as that of diamond.

What's inside these alloy pipes? In reality, when seeing these metal pipelines, many people's first thought will be to transport oil or natural gas, of course, in this environment, Luo Xu will definitely not think that it will be oil. God, if it was really oil in it, Luo Xu felt that he was either crazy or hallucinating.

The dazzling light illuminated the surroundings, Luo Xu was still thinking about the rest of the things, and the mechanical interface suddenly enlarged a place, but it was the interface between the building and the pipeline in the middle, and from time to time a trace of white gas was emanating, as if there was a leaking object.

You don't have to look closer, the computer has automatically analyzed that it is liquid helium. Luo Xu looked stunned, liquid helium? Could it be that liquid helium is transported in these pipelines? Liquid helium is different from liquid nitrogen, its melting point is -268.785 °C, which is not much different from absolute zero, it can be described as an absolutely very scary liquid, what is in these buildings? Need to transport liquid helium?

The three buildings were large in size, with a dark metallic sheen on their surfaces, but there was not a single word or pattern printed on them, making it impossible for Luo Xu to guess them from any useful clues. Unless Luo Xu cut or violently destroyed it now, he could only frown his brow even tighter.

"The interface here seems to be broken......"

Luo Xu walked into the base of the building in the middle, and although the strong light still couldn't shine on any damage, the white mist that "hissed" kept spitting out proved that there was indeed damage at the interface where it could not be seen. This state of damage lasted for an unknown amount of time, and Luo Xu took a cautious attitude, not in a hurry to immediately probe the objects inside the three buildings, but slowly retreated, leaving the current situation as it was.

The surroundings are silent, and the lumen of the searchlight is very amazing, but except for the front of the searchlight, the surroundings are always shrouded in "tumbling" darkness, and the scattered part of the light is often swallowed by the darkness after not running a long distance, in this environment, Luo Xu can even hear his faint heartbeat.

Taking a deep breath to relieve the pressure in his heart, standing motionless in this place for a long time, Luo Xu obviously felt a little uneasy, and he no longer continued to stay here to check the three unknown buildings, and walked along the road where the pipe was laid, towards the opposite side where he came.

The whole "ten" road is divided equally, that is to say, this half of the road will not exceed 700 meters, Luo Xu looked for clues, while taking care of the pipeline, walked for about ten minutes, and came to the end of the road.

At the end is a stone wall, three neatly laid pipes, laid directly into the ground, it seems that the shaft reserved during the construction period is used as a pipeline, as for where the pipeline leads after entering the ground, it is not what he can understand now.

He thought about it, and simply gave up his doubts about this place, relatively speaking, the superstructure of the pyramid building attracted his interest more, anyway, he didn't have to rush for a moment.

Thinking of it, X2 took him to the sky, and soon flew out of the big hole in the distance, back to the inside of the passage. Stabilizing his figure, Luo Xu sighed a little, but he only explored below for about twenty minutes, but it was as if several hours had passed, if he wasn't wearing X2 and was confident and safe, he wouldn't dare to stay there alone. He has a feeling, ordinary people will really go crazy when they go down, darkness and the unknown have always been the source of fear, and human beings are not able to easily overcome this fear.

At this moment, he had made a decision, and immediately ordered the K200 parked there to probe the thickness of the stone wall blocking the passage to see if it could be blasted open. The multi-beam measurement system quickly returned the information he needed, and the stone wall was ten centimeters thick and could be opened directly.

Luo Xu nodded, took a few steps back to the back of the K200, the modified special K200 extended its own mechanical arm, and a "needle mouth" nozzle came to the stone wall 25 mm to stay, and then the 15 kilowatt ytterbium-doped fiber laser popped up on the fuselage, aiming at the set target area, and suddenly burst out a slender ray of light, impacting the stone wall.

Because the air here is extremely clean, there are few fine dust particles in the air, coupled with the extremely low humidity, the laser beam that concentrates most of the energy is not as bright and dazzling as imagined, but a faint light, which seems to be harmless to humans and animals, but the energy contained in it has perforated the stone wall in an instant, and the laser beam was suddenly stopped and disappeared by K200.

Next, every few seconds, the laser is fired along the trajectory, and at the same time, the nozzle port on the robotic arm sprays 517kpa of compressed air out of the pipeline, and cooperates with the target and the laser beam at the slightest speed, constantly adjusting with the trajectory and depth. Soon, under the high temperature of the laser's precise manufacturing, due to the temperature stress caused by the higher temperature gradient, different minerals in the stone wall began to form different expansions, and after five minutes, the connecting bonds between the mineral particles of the stone wall were broken, forming a macroscopic impact for a moment, and the stone wall within the range of the circular trajectory suddenly collapsed, turning into small pieces of stone chips and collapsing on the ground.

The passage opened, and a chilling cold wind poured in from the outside of the passage, forming a gust of wind in the passage, and it took about ten seconds before it slowly calmed down.

The two gyroplanes rushed into the passage first, Luo Xu followed, and when he walked in, he found that it seemed to be no different from the outside, only one difference, that is, the patterns carved on the surrounding stone walls had disappeared, leaving only the bare stone walls. In this way, Luo Xu instead sped up his speed, and after walking a hundred meters, a rotating stone staircase appeared, and after walking up around the stone steps, his eyes suddenly opened up, and a square paved with flat stone slabs appeared in front of him.

On the opposite side of this astonishingly wide square, a row of stone steps rises through an arched stone gate, behind which is a symmetrical "palace". The reason why it is called "palace" is not really like the modeling style of the palace on the earth, but Luo Xu from the perspective of the structure of the entire building, temporarily called it "palace", maybe the sacrificial platform is more accurate.

Luo Xu looked around, the square hidden in the darkness was empty, there were no noteworthy clues, he didn't waste any time, walked through the square hundreds of meters long, stepped on the stone steps and walked towards it.

When passing by the arched stone gate, standing below seemed to be much larger than watching from a distance, Luo Xu shook his head and observed for a while, passed through the stone gate, and officially came to the front of the hall in front of the "palace". As he got closer, he immediately realized that he was biased, the word "palace" was not accurate, it was just a slightly higher altar, and the back of the platform was full of stone walls, and there was no entrance or exit.

His gaze did not linger on the altar for long, but in a blink of an eye, he was attracted by the patterns on the stone walls on the left and right sides of the temple.

"It's ......"

Luo Xu's spirits perked up, and he finally saw the mural with a clear meaning, and it was no longer the ghost painting symbols in the passage before.

The pattern on the first stone wall on the left is engraved with a circular object, and countless lines are pulled out around this object, Luo Xu thought about it, and felt that these lines should express the meaning of light. What's interesting is that in the back, underneath the round object, there are a lot of "people" watching, which means that the round object is in the air?

The mechanical interface magnifies the "human" underneath, where is this human, it is a strange creature at all, with limbs like a dog, but there is no head on the long neck, but four soft tentacle-like things protruding from the fracture, where are their heads? Where are the eyes? Because after all, due to material limitations, it can't be seen from the mural, but Luo Xu can imagine the disgusting in reality.

It may be wrong to think so, the universe is so big that there are no wonders, maybe extraterrestrial life will still feel disgusting and incomprehensible when they look at the human beings on earth.

However, this creature, as guessed from the first mural, is likely to be an intelligent creature that built this unknown structure. Luo Xu pondered, and then moved a few steps to look at the second mural, the second painting was a bit strange, the round object was surrounded by dense alien creatures, and I didn't know what it was doing. The third painting is very "cruel", with a thick line carved by the circular object on the mural, which directly reaches the "limbs" of the alien creature, and the "limbs" of the alien creature are broken.

Luo Xu made a gesture of stroking his chin, and suddenly realized that he could not do this action with a helmet, so he gave up again, and the third picture is easy to understand, the break of the "limbs" of the alien creature should represent injury or death, that is, the round object attacked them.

The fourth painting suddenly changed dramatically, the round object was floating in the air, and below it was still a dense crowd of alien creatures, except that next to the alien creatures, a large triangle was missing the upper half of the corner. After being stunned for a while, Luo Xu reacted, this triangle refers to the unknown building of the "pyramid" at the moment.

The four drawings are coherent into a single picture, expressing a clear meaning, that one day a circular object appears in the air, emitting an incomparable light, and under their watch, the circular object "kills" (kills?). Many of their companions, and then under the supervision of the circular object, they built the building.

Although it is speculation, Luo Xu still has a question, judging from these murals and various architectural styles, the civilization of these intelligent creatures is not as advanced as he imagined, in this case, how did these intelligent creatures build this pyramid with such a huge scale?

A flash of lightning flashed through his mind, Luo Xu suddenly realized, it turned out that this was the case, he had been ignoring the key point, since he saw this pyramid, he had always thought that the huge pyramid was definitely built by intelligent creatures with a technological level above humans, but he ignored some questions, that is, must it be necessary to build a creature with advanced technology?

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