The ten-meter-wide passage was made entirely of solid stone slabs, and the stone walls were carved with various patterns, which, according to Luo Xu's guess, were supposed to be symbolic expressions, rather than conveying any messages or pictures.

Bob compared the thousands of photos he took, and found that there were 754 with the same pattern, 1,920 with similar patterns, and 2,000 and 200 with different individual patterns.

The gyrocopter on the right continued to explore, while the gyrocopter on the left encountered a stone wall across the passage, cutting off its path. The gyrocopter flew up and down the stone wall a few times, and when the searchlight swept it, it found a pattern carved on the stone wall, which was a regular triangle and a circle cut inside, and I don't know what it meant.

There was no way, the passage here was blocked, so Luo Xu had to let the gyroplane return the same way, accelerate and fly back towards the right passage, and strive to catch up with the second rotorcraft drone in a short time. The drone on the other side has already flown seven or eight hundred meters, and according to the length of the base of this building, there are still hundreds of meters to the end, and it is possible that it will also encounter a stone wall blocking the passage.

As expected, after flying a few hundred meters, the gyroplane also encountered the same stone wall, on which a regular triangle was still depicted inscribed and a circle, but the difference was that on the ground, which was still two or three meters away from the stone wall, a large hole collapsed, and the darkness was bottomless.

"Uh, can you get in from here?"

Luo Xu's heart moved, and he ordered the gyroplane to be directly aimed at the loophole and land. The searchlight on the drone began to scan the surrounding environment for the first time, and to Luo Xu's surprise, after the light shot out to the left, it was swallowed up by the darkness, and he couldn't see it at all.

Luo Xu was stunned, although the rotary-wing drone is not a high-power xenon lamp, but the longest range is more than 100 meters, and now this situation does not mean that the depth below is more than 100 meters? This pyramid even has an unknown amount of underground structure. Fortunately, the rotary-wing drone is equipped with lidar, and the searchlight exploration cannot reach the visual distance, so the radar is immediately activated, and the light pulse that an electrical pulse becomes is instantly shot down, and it returns in a moment, and the target distance is immediately displayed, 930 meters.

Gasping, Luo Xu really didn't know what to say except for shock, the scale of this pyramid was already amazing enough on the surface, but he didn't expect its actual internal scale to be doubled, I don't know what the point is to make such a deep underground layer?

Another point is that up to now, the rotary-wing drone has entered the interior of this building, but it has not encountered any suspicious creatures, which proves Luo Xu's suspicion that this huge building is indeed a ruin. I just don't know what the purpose of this ruin was built 100,000 years ago? It is said that it is used for living, which is not like it at all, Luo Xu feels that it is more like a building in a museum or a memorial hall, no, it is not a memorial.

Luo Xu knocked on the table, his eyes seemed to see through a place thousands of miles away, it should be like a pyramid-like mausoleum.

The more he thought about it, the more he felt that the intricate patterns on the walls, the mysterious atmosphere of religion was very strong, and all of them presented exquisite and symmetrical structures, although he couldn't understand them, but he had to agree that there was a mysterious charm.

After coming back to his senses, the gyroplane did not fly downward, but flew along the stone wall under the pedestal, and after flying for a while, it was clear from the three-dimensional map that the underground structure of the building should be in the shape of a regular cube, and the depth was exactly the same as the height of the pyramid on the ground.

The underground was a huge empty void space, but the ground was blocked by a layer of pedestal stone walls, and the gyrocopter flew for thousands of meters without finding a hole to go up, and finally had to return to the original hole and fly back to the passage. Luo Xu took a sip of water, a little helpless, now it seems that there are only two ways, either go to the bottom to have a look, or use heavy equipment to open the stone wall blocking the passage.

"Well, let's go over there first."

Luo Xu put down the teacup, stood up, and walked towards the door of the studio, his pace was about the same as that of ordinary people walking, and several mechanical arms on the ceiling of the studio that could move freely suddenly began to work, quickly loading parts from various parts of X2 on his body according to Luo Xu's forward route. First the helmet, then the back armor, the hand armor, the leg armor, in the "click" sound, the parts automatically connected and locked, and when he walked out of ten meters, an X2 armor was already on his body.

Coming to the testing room, Luo Xu stepped into the light film without hesitation, his eyes flashed, and he came to this strange planet across countless light years in an instant.

Coming to this place in person, it's not much different from what you see on the screen, thanks to the ultra-high definition of the screen, any details are clearly displayed. Standing in place, glancing around, Luo Xu was slightly disappointed, the environment of this place is not beautiful, if it weren't for the unknown building outside the ground, it would really be difficult for people to be interested in staying here longer.

Looking up at the snow-capped mountain in the distance, Luo Xu's eyes gathered, and in a moment, the neuromechanical interface automatically magnified the snow-capped mountain in the distance eighty times, stretching it to a distance that could be reached, and it was white and he couldn't see anything. Luo Xu smiled dumbly, it seems that the intelligence of this X2 cannot be compared with Bob's AI, and it can't really be perfect.

Came to the forward base temporarily built by the robots, it was a gray-black dome building, with an area of only about 100 square meters, divided into upper and lower floors, equipped with a life cycle system and some equipment, which could allow Luo Xu to survive in it for more than a week. Although in Luo Xu's opinion, he didn't need to live here, he didn't need to live here, and could only use it as a temporary resting place and a place to replenish weapons.

After thinking about it, Luo Xu was not in a hurry to go to the pyramid, but with a movement of his eyes, the thruster behind him was activated, and the high-energy electron stream suddenly erupted, and X2 took Luo Xu into a meteor that rose into the sky, and galloped to a height of three thousand meters to stop.

The thruster weakened the electron stream according to Luo Xu's instructions, and under the calculation of the on-board computer, it just balanced with the planet's gravity, and Luo Xu wore X2 and suspended in the air out of thin air like a fairy.

Three thousand meters in the air, Luo Xu looked around, the steep mountains were endless, and the peaks that had been eroded by the wind and frost of the years, slashed by knives and axes, steep and straight, and high and low, stretched quietly and coldly all the way beyond the skyline. Seeing the inside, it was magnificent, so that Luo Xu couldn't help but sigh at the beauty contained in it, but unfortunately the sky was gloomy, the dark clouds were thick, and such a spectacular scene of towering peaks made people sigh at the same time, a chill also arose, as if they were in a mountain ice prison, and they couldn't help but give birth to a dark and terrifying mood. In particular, this place is indeed separated from the earth by many light years, and the feeling of madness is even stronger.

The data on the screen on the right side of the neuromechanical interface is constantly flowing, and based on the distance between the horizon and the radar, the curvature of the planet is immediately calculated, and the radius of the strange planet is roughly deduced - 6,500 kilometers, which is slightly larger than the Earth.

As Luo Xu circled 360° in the air, under the interface screen on the left, the reduced pictures were quickly summarized, it turned out that X2 was taking photos of all the surrounding mountains, and when these photos were collected into the computer, they would be processed to form a three-dimensional topographic map output, so that Luo Xu could have a clear idea of the surroundings. It's just that this method uses a special algorithm after all, which is not as good as LiDAR near detailed detection, but it is definitely the simplest and fastest detection method.

It didn't take long for the surrounding mountains to be photographed, Luo Xu didn't stop much, the thrusters increased the output, and continued to shoot straight into the sky, he was ready to see what was in the farthest part of this place. X2 rose rapidly, and after a while, it broke through the thick clouds and came to the sky above the dark clouds, but instead of seeing the dazzling sunlight in his imagination, a huge planet more than ten times larger than the moon and glowing with a faint white light was suspended in the sky, almost within reach.

"This ...... What's going on? ”

Luo Xu was stunned for a moment, and suddenly reacted, "I see, this planet is a satellite." ”

He thought for a moment to understand the cause of the phenomenon in front of him, the planet suspended in the sky was undoubtedly much larger than this planet, and the bleak light it emitted was the reflection of the star's light. In other words, the current strange planet is not strictly day, but night, and the reason why it is much brighter than the night of the earth is because the "moon" here is also much larger than the earth, and the reflected light is more intense. The area he is in is on the dark side of the planet with its back to the stars, and if it weren't for the "moon" suspended in the sky, it would definitely be pitch black.

"Well, the night time on this planet has been recorded for more than 24 hours, doesn't that mean that the rotation speed is slow?"

Coming to an altitude of 40,000 meters, Luo Xu controlled X2 and stopped, looking around, the terrain more than 700 kilometers away also came into view, to Luo Xu's surprise, the place where he was originally located was a continent, but the area more than 500 kilometers away was covered by a black one, according to Bob's analysis, it was an ocean formed by liquid water.

"Won't it freeze at minus 40 degrees?"

"SIR, according to thermal imaging observations, the ocean surface temperature is as high as 16 degrees Celsius, which is analyzed to be caused by seabed geothermal heat."

"Well, I see, so where I'm on an island?"

Luo Xu looked at the four directions, the right land extended to more than 500 kilometers, the front land extended to more than 700 kilometers, the left land extended more than 300 kilometers, and the back extended more than 400 kilometers, this is an island with a length of more than 1,100 kilometers and a width of about 900 kilometers. Converted to the real world, the length is the distance from Yanjing to Hangzhou, and the width is also the distance from Yanjing to Xi'an.

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