"Okay. The pen "Fun" Pavilion www.biquge.info "Seeing that there is no other entrance for the time being, Zhou Xin agreed to Atlas's suggestion.

After a few seconds, the screen changed slightly, and Zhou Xinzhi was able to switch to the small detector carried by the probe. Then, the screen began to move again, and the triangular opening, which was originally not large, was enlarged little by little, and finally took up the size of the entire screen.

After entering the cave, Zhou Xin saw that the inner wall of this small passage looked very flat, covered with a small amount of black substance and not a little dust, and it seemed that it had not been activated for a long time. The small detector slowly moved through the passage, and the occasional dust that kicked up severely interfered with the view, allowing the probe to only capture a short distance away.

This passage is obviously relatively straight, the probe has advanced for nearly ten minutes and still hasn't turned a corner, the inner wall of the passage that appears on the screen is still unchanged, I don't know how long it has been going, the first corner finally appeared in front of me, and after turning this right-angle bend, the probe came to a spacious space.

Seeing a new scene on the screen, Zhou Xin breathed a sigh of relief, "Whew, I finally came out of the passage, if the probe continues to move forward like just now, I don't know if it will fly out directly from the other end of the space building." ”

"So what's the point of building this passage?" Spred replied casually, and the group watched the images that appeared on the screen.

In the middle of this spacious space is fixed a large mechanical device, which, like the inner wall of the passage, has been covered with a lot of dust, and although no signs of rust can be seen on its surface, some of the exposed mechanical parts have severe wear and tear. It seems that this device has obviously stopped working for a long time.

"What is this machine for?" Seeing the mechanical device in the space, Zhou Xin asked curiously.

"People don't know." Atlas replied, "But it seems that this shape should have something to do with the propulsion device, and the previous guess may be correct, this should be the engine used to adjust the attitude of the entire space building, but why does this device look so old, and it seems that it has not been used for a long time?" Speaking of the latter, her tone began to become confused.

The little girl's guess made Zhou Xin also feel a little puzzled, but he had seen a lot, so he didn't speculate too much now, "Maybe after investigating this space building, I'll know, now let's let the probe continue to look for the passage to enter, stay in this place and can't investigate anything." ”

Atlas nodded, and the probe continued to search the space.

Over the next ten minutes, the probe surveyed the space in detail, and when they did, they discovered that the space was not very large, almost the size of a single room. At different locations on the inner wall, the probe did find several holes, but judging from the location and shape of the holes, it is estimated that these holes should be the same as the passage that the probe entered at the beginning, which leads to the outside of the space building, so Zhou Xin and Atlas did not rush to let the probe enter these holes, but continued to look for other entrances on the inner wall of the space that are more likely to lead to the interior of the space building. After a while, the probe actually found a different hole.

The hole that has just appeared on the screen is not a standard triangle, although it also has three sides, but each side is not straight, but has a certain arc, and the size of this hole is significantly larger than the other holes. At the same time, Atlas also found that the other openings were almost all concentrated on one side of the space, and only this one was on the other side of the space, and the distance from the other caves was the farthest.

"Looks like this should be the entrance." At the first glance of the hole that appeared on the screen, Zhou Xinxin had this idea.

Then, without waiting for Zhou Xin's order, Atlas directly controlled the probe to drill through the hole, and this time it didn't take long to advance, and the probe's forward path was blocked.

Looking at the metal object that appeared in the detector lens and completely blocked this passage, Zhou Xin felt a little depressed. However, to his surprise, when Atlas controlled the detector and only tried to hit the object blocking the passage, the thing was knocked away. Seeing this, Zhou Xin was slightly stunned, and just when he was in a daze, the detector had already passed through the barrier and continued to move forward.

"Something that was in the way of the passage just now." Seeing that the probe had continued to move forward smoothly, Zhou Xin asked with hindsight.

"Looks like a valve leaflet." Atlas glanced at the object as the probe passed by, "but it seems to have been a little damaged when it connects to the channel, so the probe crashed away with a slight bump." ”

After listening to Atlas's explanation, Zhou Xin finally understood, and then he continued to focus his gaze on the screen screen.

Then, as it progressed, the probe encountered two more metal binders blocking the entire passage, but they were still knocked open without incident. However, by the time the probe encountered the fourth binder, the old method was no longer working.

In the screen, Zhou Xin saw that this impact of the detector had no effect, except that the lens was vibrating slightly, and the metal sheet blocking the passage was not knocked open as before.

"Isn't it okay?" Seeing this situation, Zhou Xin's words were filled with some disappointment, and while speaking, the probe tried two more impacts, but still unsuccessful, except for seeing some slight shaking, the metal binder was still blocking the passage.

"It really doesn't look good." Atlas's tone was also a little helpless, and then she said suspiciously, "But the detector did feel that the back was empty when it hit, why can't it be opened?" ”

"Maybe it's a stronger connection to the passage." Spred said, "What next, it seems that we have to go back the way we came?" ”

"If you go back, you'll have to find another way in." Zhou Xin's brows furrowed, "I estimate that even if there are other passages, they should be similar to this passage, and we still have to find a way to pass through similar metal sheets." As he spoke, he thought of a solution in his heart, and suddenly, he seemed to think, "Metal binder? Could it be—" He patted his head, and then said directly, "Atlas, tell the probe not to crash again, and see if you can pull the loose leaf apart?" ”

"Pull away?" The little girl's tone looked a little suspicious, but then the detector stopped preparing to hit again, stretched out its small robotic arm and sucked the metal binder, and then pulled it, this time it seemed to be very relaxed, and the metal binder was suddenly pulled open like a door.

This made everyone feel a little surprised, and they all looked at Zhou Xin, waiting for his explanation.

"Actually, we fell into the wrong place of thinking." Zhou Xin opened his mouth to explain, "Just now, because it was easy to knock open the metal loose pages in front of us, so let's think that these loose pages were pushed inward. In fact, this is not the case, if this is really the propulsion system of the space building, then the space we just passed through is the engine room, then it can be deduced that the channel where the probe is now located should be the fuel pipe, so the use of those metal loose sheets is about to come out. ”

Speaking of this, Zhou Xin paused, and then Spred continued: "That means that there is a high probability that those pieces of metal binders are valves to prevent fuel from backflowing. ”

Zhou Xin nodded, "If it's a valve, then it needs to be able to pass through the fuel smoothly while preventing backflow, so-" He didn't need to say a conclusion before everyone understood, and their faces showed a look of sudden realization.

After passing through the metal loose-leaf, the probe continued to move forward, and before Zhou Xin could finish explaining, it flew out of the narrow passage and came into an empty space.

While explaining, Zhou Xin looked at the screen on the screen, and the space he saw this time was completely different from the one in front, and at first glance, it felt that it was much larger than the previous space with a metal device. Moreover, in the footage taken by the probe, there is nothing in this space, and the surrounding metal inner walls can be seen at a glance.

"Looks like this should be the fuel tank." After listening to Zhou Xin's explanation, everyone focused their eyes on the screen again, looking at the picture on the screen, Spred said thoughtfully.

After a while, Atlas's voice rang out, "Brother Captain, it seems that this space has not been used for a long time, and the traces on it seem to have been left a long time ago. Without Atlas's explanation, through the lens of the detector, Zhou Xin also saw the traces on the inner wall that looked very old, and also saw the thick dust covering it.

"It looks like the whole system hasn't been used in a long time." Seeing the detector coming all the way, and the scenes that appeared in the lens were full of dust, Zhou Xin couldn't help but muttered to himself, and then he said suspiciously, "Strange, this should be a very important facility, how can there be no traces of use at all?" ”

"Maybe it's because the posture of this space building is very stable, so it hasn't been a long time since I needed to adjust my attitude?" Spred guessed.

"I don't understand." Zhou Xin shook his head puzzled, thought for a while, and finally chose to give up thinking about this issue, "Forget it, Atlas, has the probe found the exit to this place?" If I'm not mistaken, we should be able to actually enter the space building. ”

As soon as he finished speaking, the probe happened to find a different place on the inner wall of this space. In the screen, a triangular depression suddenly appeared, which was much larger than the previous passage into this space, but when they looked into the depression, everyone found that it was only three or four centimeters down, and a metal plane was in front of them.

"Will it be here?" At the first glance of this depression, Zhou Xin was not very sure. So, he first asked the probe to investigate other parts that had not yet been examined. In the end, it was found that the inner wall of this space, except for the passage that came in, and the triangular depression that was discovered later, all other places were flat metal inner walls. So, the detector eventually returned to the recess of the triangle.

"How do I get out now?" This time it was Dart who asked the question.

Zhou Xin thought as he spoke, "Since it should be the fuel inlet, let the probe push it and see." ”

Although he thought so in his heart, Zhou Xin was still a little surprised when the detector only pushed it once and directly opened the exit.

"It's so easy to open?" Many people present were also surprised, and Spred couldn't help but blurt out.

"It looks like it's really been a long time since it's been used." Zhou Xin didn't know what to answer, and in the end he only squeezed out this nonsense that he had said a long time ago. As he spoke, he kept glued to the screen, trying to know where the probe had gone when it came out.

After drilling through the hole, a very empty space appeared in the detector's lens. To everyone's confusion, they couldn't see any light from anywhere else in the space except for the detector's own light, and the reason why they were able to determine that this place was very empty was because the detector's light couldn't see the other four sides except for the ground and ceiling.

"What is this place?" Seeing the picture on the screen, Dart asked curiously for the first time.

"Who knows." Zhou Xin replied casually, "Let's let the probe investigate first." ”

As he spoke, more small probes entered the space along the passageway, and as soon as they entered, they directly joined the investigation of the space. Ten minutes later, with the efforts of many probes, they finally finished exploring this dark space.

After collecting all the images sent back by the probes, Atlas spoke, "Brother Captain, this place looks like a control room. At the same time, the sight of this space being complete appeared on the screen.

Zhou Xin saw that what appeared on the screen was a spacious room, in which some consoles and unknown mechanical devices were placed in order, and the detector just flew out of a jar opening against the wall that exposed a corner. At first glance, none of the devices were operating, and the thick dust on the ground reminded everyone that there had been no signs of human activity in this area for a long time......