Three small submarines were left behind in the exit below the city before they started to close slowly. We were unable to reach the vicinity in time due to distance reasons. However, such large exits generally have small openings in nearby areas, which is like there is a small door above the gates of many units. Usually, the gates are not open, and only the small doors are used for entry and exit.

Although this mobile city has a distinct Arabic style, it is still an artificial object, so it is inevitable that some habitual designs will be preserved, and this small door is one of them. When we arrived near the main door, the door was completely closed, but we quickly found the small entrance.

This is a small entrance such as an inspection passage. The outside hatch is a circular cover with a diameter of more than one meter. It is controlled by the simplest rotary handle and can be used both inside and outside.

I waved to Zhenhong, then pointed at the thing, then took out the weapon and put on a guard position next to me. Zhenhong knew how to hold the handle, while the others were ready for battle.

Although this kind of gate is very difficult to rotate underwater due to pressure, even if Zhenhong cannot turn, Zhenhong can twist it directly off with the power of Zhenhong. Turn the handle very easily, and the gate quickly relieves pressure, and quickly loses the pressure and is pulled open by Zhenhong. At the moment the gate is opened, I was the first to enter. However, there is no danger inside. This is just a maintenance channel, and there is no one at all, so there are no guards inside. However, I still urge everyone to enter the small drainage room in this door as soon as possible. After all, this is part of someone else's city. We cannot guarantee whether this thing has a similar control system to the Aisinger Mobile Fortress. If it is the Aisinger Mobile Fortress, any closed door is opened by someone, the city tree will immediately discover and track the target. If the detection finds that it is not one of our own, the guards in the whole city will immediately know that we have been invaded.

Of course, the city trees of our guilds are very rare and special existence, so generally speaking, other guilds may not be able to get such a control system. However, it is not ruled out that other guilds have certain special control capabilities. Therefore, we need to speed up from the beginning of opening the door, because the other party may already know that someone has come in.

Because this maintenance passage is not the main passage, the drainage cabin behind the door can only barely squeeze in with six people. There are too many people on our side, so we had to divide it into two groups.

Masaga Matsumoto, Kakuda Ichiro and Christina, the first round of gold coins entered, and the others were assigned the second time. After closing the drainage cabin, there was a manual switch on the wall, but it was not the kind of thing that would automatically drain when pressed. This thing is not that advanced. In fact, this drainage device is a shaker. It takes constant rotation to drain the water in the room bit by bit. Normally, this drainage method requires a person to shake for more than ten minutes to drain the water in the room. But we didn't have that much time to wait, so I directly pulled Brigitte out and asked her to help.

Brigitte is a constructed creature like IFR, which is a robot-like structure. And unlike ordinary artificial constructed creatures, IFR and Brigitte are both very high-end constructed creatures, which look similar to the style of the gods in the famous science fiction game "Starcraft". The body is covered with a large number of runes and crystals, and the structure looks very different from human creations. However, although it is different from the mechanical bodies built by humans, the characteristics of the mechanical bodies are the same, for example, the wrists can rotate infinitely.

If the shaking handle is shaken, even if you have strong strength, the speed will not be much faster. After all, the human speed is not particularly fast. But there is not so much trouble for the mechanical body to come. Brigitte directly reached out and pinched the center position of the shaking handle instead of the handle, and then her wrist began to rotate. Because her wrist can rotate freely at 360 degrees, there is no need to let go, and it can continue to accelerate. As her wrist speed becomes faster and faster, the shaking handle also rotates, and in the end it almost becomes a blur, and it is completely impossible to see clearly.

The advantage of this ultra-high speed is the ultra-high drainage speed. The water in the room is rapidly decreasing at a speed visible to the naked eye. It is completely drained in just over a dozen seconds, and the speed is amazingly fast.

The floor below this room is designed with a mesh hole. There is actually a distance below the floor. There is something like a float ball used in a toilet tank. The structure of this thing is very simple, it is a lever plus a rubber ball. When there is water in the environment, the buoyancy will lift the rubber ball and drive the lever to pry the latch on the other end to lock the cabin door. That is to say, before the water in the room is pumped to the appropriate position, the connecting door between the drainage cabin and the inner space of the hull cannot be opened at all.

When we gradually drain the water, the water level line is lower than the floor and it continues to fall. The float ball under the floor begins to sink due to its own weight because it loses buoyancy. As a result, it naturally pulls out the pin on the other side so that the door can be opened.

This design is actually very simple. Ordinary people can complete it with just a few simple tools, and there is not much technical content. So, some things that look very high-tech are actually far from as complicated as imagined. When people who don’t know can automatically control whether the door can be opened based on whether there is water in the room, they may directly think of electronic induction or intelligent control, but they actually use a float and a spring latch. Most of the technologies used by Russians in this city are similar, and they have solved extremely complex projects in a very simple way.

This design style is a Russian characteristic. In addition to reducing technical difficulty, this characteristic also brings two benefits: one is that both manufacturing and repair are simple, and the other is that it is durable and has a low failure rate.

The simpler the thing, the lower the failure rate. The hammer used at home and the mechanical forging hammers in the factory are theoretically hammers, but the hammers at home will not fail. The mechanical forging hammers will often have problems. This is the problem of the probability of failure of complex items. Although the Aisinger Mobile Fortress in our guild is much more advanced in technology than the Russians underwater city, it has to be admitted that the Russians beat us in terms of failure rate. At that time, the Aisinger Mobile Fortress had two or three times, because the main power pipeline was hit, causing the entire city to lose its power and fall directly to the ground. Fortunately, we estimated that this situation was installed in advance, otherwise the Aisinger Mobile Fortress would have fallen apart.

After draining the water flow here, we successfully drilled into the internal passage, while Brigitte was left in that room by me, helping Zhenhong and the others in a while.

I thought about it and felt that this was the only reliable method. We didn't know the existence of this underwater city in advance, so it was naturally impossible to collect information here in advance. If the city under the tree was not large, it would be fine, but this thing was obviously not small, and the internal space of this man-made object would definitely not be flat like an ordinary city. Instead, it should be like a ship, with the inner part being layer by layer, which invisibly increased the number of cabins. We have to find the target cabin in so many cabins, although it cannot be said to be a needle in a haystack. It is not a solution to rely entirely on blind touching. As August Xun said, there is a possibility of being discovered here, so it is the same whether to grab a tongue or not. Of course, if we can find the command room, it would be a different matter.

"Then follow the advice of August Xunde, let's grab a tongue and ask." As I said, I turned around and walked towards the horizontal passage over there, and then asked, "Which side do you think is more reliable?"

Matsumoto Masaga and Aotsuki both shook their heads because they knew nothing about the structure of this large-scale equipment. Jin Coin thought about it and said, "I suggest going to the left."

Judging from the position and direction we entered here before, the left hand direction of the passage probably points to the tail position of this huge beetle-shaped city. Because the hatch we just entered is probably at the connection point of the beetle's chest, that is, the head and abdomen. Therefore, our left and right sides should point to the head and tail respectively.

After saying that, Jin Coin explained consciously: "The head of this large equipment should be a warhead. After all, if a fight occurs, the head is mostly aimed at the enemy, so it is impossible to put fragile research facilities on the head. The more reliable setting is that the head is all combat compartment, used to install weapons and small vehicles. The chest position in the middle is probably the position of mechanical components such as power systems. What we see now also proves these. The tail of the city is the largest area and is relatively safe, so the living area and experimental facilities are most suitable here. However, I think such a large tail is unlikely to be all experimental areas. So what we are looking for is probably in the middle of the tail. There may also be defensive weapons and parking berths for small ships on the outer layer."

The analysis of gold coins can be said to be quite accurate, so no one here objected and accepted it all. First, we carefully closed the entrance to our entry, and then we moved to the entrance of the hatch at the bottom of the left passage.

We listened through the door and found that it seemed quite noisy across the hatch, which means that the noise on our side would probably not attract the attention of the other side. Since we were not afraid of the sound that alarmed the other side, I discussed it with Matsumoto Masaki and the others here. Everyone thought it would be better not to open the door directly, so I finally released a few ghost insects and then used them to blur their own characteristics and let them pass through the door.

After the Ghost Worm Door passed through the gate, I immediately saw the situation behind the door from the shared field of view. It was quite unexpected that there was not a room behind the door but an elevator.

"Is this thing an elevator?" Masaga Matsumoto asked in surprise.

I nodded and said, "It's not surprising. We entered from the bottom of this city, so this place is the bottom-floor cabin, and it's not surprising that there is an elevator passage inside, right?"

Masaga Matsumoto nodded and asked, "What's the situation above?"

"My ghostworm is still moving, you guys wait a little later."

The ghost bug walked up the wall of the elevator, then walked out of the ceiling and climbed along the Range Rover above the elevator to the upper level of the elevator. There was a gate at this upper level, which was the elevator door. The ghost bug carefully blurred itself and then passed through the door, and then I saw the situation outside the elevator.

The location of this floor is about two meters above our location. The distance is not large, but the situation inside is different from ours. The noise inside the floor is very terrifying, and through the eyes of the ghost bug, I can see a row of huge machines in the room working back and forth. However, because part of this thing reaches another room, I can only see some of the structure, and I have no way to guess what this thing is for. In addition, in addition to this machine, there are a large number of pipes and valves in this room, which look like a steam engine during the Industrial Revolution. There are steel parts everywhere, and steam will be sprayed from time to time, looking very backward.

I noticed before that the Russians' technical routes are different from ours, and now I have completely understood. The technical routes adopted by our Frost Rose League are actually a technology that conforms to the content of the game after accepting various settings in the game. The main body is magic and energy use, so the technical equipment of our guild often does not look like industrial products on the earth. After all, you will not see large tiles of gems on machines in factories. But our guild equipment will have them because our equipment uses a large number of magic institutions, and these things are based on magic arrays. If there is no magic gems as energy nodes, it will be difficult to operate. Therefore, the equipment of our guild looks bright and shiny. However, the Russians are not actually studying these magic technologies in the game. Of course, it is not that they have not used magic at all. They just say that they did not use magic as the main attack direction, but simplified all the mechanical technologies they used in reality and copied them into the game.

Although the equipment in front of me is not sure that it is a steam engine, I can actually roughly determine it. This thing is probably a magical version of the steam engine. Although it uses a magic array instead of coal, its working principle is still boiling water to generate water and pushing the piston to work. So even if it is used to heat it, this thing is still a steam engine. This is completely different from the technology of our guild. The magic equipment we use directly uses magic energy to generate kinetic energy, and does not require the water vapor as a conversion medium.

I cannot directly conclude which of the two designs is better. On the surface, of course, our technology is better. But if you think about it carefully, this kind of steam engine also has its own advantages. It can only be said that each has its own strengths. The equipment of our guild is slightly stronger.

After observing the equipment in this room, I let the ghostworms scatter and climb to several entrances and exits of the room. The structure of this room is quite strange, and it feels like it is separated from the middle of a long corridor. There are diamond-shaped arches on both sides of the passage, and there are watertight gates on the arches. But now they are open, so you can see from the door that there are long passages in front and back, and all of them are working up and down. As for the people who are taking care of these equipment... there are indeed, but there are very few people and they are not nearby.

Although I confirmed that there was nothing dangerous on the floor above, I did not take Matsumoto Masaki and the others up immediately, but asked the ghost bug to continue up and then explore the situation on the upper floor above the elevator. The elevator is not only two floors. In addition to the floor where we are and the mechanical equipment above, there are two floors up. The ghost bug quickly went up to the entrance to the upper floor and then drilled out.

The structure of this layer is similar to that of the bottom, but there are no running machines here, there are only a lot of pipes and some instruments, and this layer is not as exaggerated as the height of the bottom layer. The floor below just now has a large volume, so the height of the floor reaches more than seven meters, while the height of this layer is only two meters. Some areas are blocked by pipes and other things, and the actual height is not two meters. People who are particularly tall even need to bow their heads to avoid hitting things.

Compared with the lower floor, although there are not many equipment on this floor, there are many people. Many workers who look like workers are walking back and forth on this floor in oily work clothes. From time to time, they need to stop and look at the instruments next to them. Sometimes they will leave after checking the instruments. Sometimes they will turn the valve next to them according to the numbers above after checking the instruments. They don’t look very busy, but they always need to adjust from time to time and cannot really be idle.

It is obvious that the Russians' equipment automation level is not high. Although the technical defects of our guild's magic equipment are also obvious, at least we don't need to control our things so many people. Even the large anti-gravity engine array on the Aisinger Mobile Fortress is only equipped with three special magicians and more than a dozen workers who have worked hard. Unlike here, I have seen at least thirty workers just this time.

From this floor and upwards, the last floor to which the elevator arrives. After this floor comes out, it is a small room, with a gate on the side of the room, but like below, the gate is open. From this door, there is a traffic network similar to an undersea tunnel. Because this place itself is inside a mobile city, the road is actually completely closed, just like a tunnel. The elevator we found out is on the side of the tunnel, which feels a bit like a repair passage.

Although the passage outside the elevator room is very similar to the tunnel, there are actually some differences. First of all, it is not exactly a lane, but most of it is a sidewalk. There are only two lanes in the middle, one positive and one reverse for limited traffic vehicles. Moreover, the few cars I saw are all animal power, and there is no feeling of a modern vehicle at all. It is just a Warcraft version of a horse carriage and ox carriage.

However, although the vehicles on the ground are very ordinary, there are also some things similar to high-tech in this place. In fact, everyone should have heard of this kind of thing because it is an elevated tram.

In fact, this tunnel is three-dimensional. In addition to being able to walk on the ground and take a car, there are several rails on the top of the passage. A special vehicle will hang under the rail like a cable car, and the speed of these things is much faster than that of the ground vehicles. However, although these upside-down cable car-like things are very fast, they cannot turn around due to the track problem and can only move along specific tracks. In other words, if these vehicles are not like subways or buses, they are dedicated lines used by certain departments, and can only go back and forth between two specific points. They cannot move at will.

Although there are a lot of people coming and going in the passage above, no one is guarding the entrance and exit locations, and those people obviously have their own affairs. This situation obviously shows that we have not been discovered yet. It seems that the Russians are indeed not as developed as ours. Even if we open the external hatch, they don’t know. Of course, this can only be a small entrance like the maintenance door we entered. If the main door is opened, it is impossible for no one to know.

Although there is no danger in the above layers, it is obviously a problem to go from which layer to go.

After I told Matsumoto Masaki and others about what I saw, everyone was a little hesitant. Kakuda Ichiro frowned and said, "The uppermost passage is obviously the most convenient transportation. You can get to anywhere you want, but there are many people there. There are actually not much difference between the two floors in the middle. There are few people, and they are all mechanical equipment, but there is no idea where you can get there."

"Or we'll grab our tongue first, let's ask?" Chihuo Longji asked.

Kakuda Ichiro nodded and said, "This is a good idea."

Christina followed, "Then which layer should we catch it?"

"Of course I caught it from the nearest one." Kakuda Ichiro said: "There are fewer people here, so it's easier to catch people."

"No." Jinzi said: "It's because there are few people, so we can't move. There are too few people here, so we must know each other. Suddenly, if one is missing, someone will notice it immediately. Unless we arrest all those people, it will be difficult not to expose our whereabouts."

"Then just catch them all, there are not many people in total."

"Impossible." This time it was Ayutsuki who interrupted Kakuda Ichiro. "The other party arranged personnel there, which means that these equipment needs to be supervised at all times, otherwise there would be no one to patrol continuously. It would be no big deal if we arrested one or two people, and the rest could complete the work, but if we arrested all of these people and no one would take care of the equipment, problems would soon arise."

"That's true!" Kakuda Ichiro sighed.

"I think it's better to catch it from the uppermost road?" Chihuo Longji said: "Although there are a little more people on the road above, the people over there are from various areas of the city and don't know each other. Even if one or two are missing, no one will find it in a while. And even if these people have any jobs, they will attract the attention of others because of their disappearance. The city is so big, they don't know where the people were missing, and it's not easy to find us. So, I think it's better to catch people from above. As long as you don't be seen during the arrest, there can be no problem in a short period of time. As long as we can know the exact target location, when they notice that someone here is missing, we may have arrived."

"It makes sense. Then we will catch people from the top."

Although the traffic in the uppermost area is much larger than that in the lower part, because most of these people don’t know each other, it becomes extremely easy to catch people. I asked a few ghost bugs to stick to the wall on the side of the passage to act as my eyes, and then looked at the pedestrians. Soon we locked in three targets.

These three people are obviously NPCs, and one of them was walking in front holding the thing and was constantly flipping through it. It seemed to look very serious, while the other two people were talking and their attention was not around. Of course, the biggest reason for choosing them as their target is that the three people were walking close to the wall, and the people behind them were very far away, so they would not notice the disappearance of the three people.

Relying on the location of the ghost bug, we can accurately know the time when the three people passed by the door of our elevator. Then, the sickle that had already been prepared was waiting with a mouthful of spider silk mucus. When I received my signal, I immediately sprayed the spider silk out.

The speed of spider creatures is very fast, almost as fast as lightning. When the three people passed by the elevator, they didn't expect anyone to attack them, so they were sprayed with spider silk mucus without resistance, and then the spider silk was quickly pulled back. The three people were also pulled in in the blink of an eye. The whole process was less than 0:00. The person who reacted the fastest even opened his mouth and had not had time to make a sound.

After the three of them were dragged in, they were knocked out by Masaga Matsumoto and Makoto, each of them. Then we quickly returned to the passage we arrived at the bottom as soon as we first arrived.

The three people were tied up with spider silk again, and after confirming that they could not move, they let the sickle use spider silk to hang the three of them on the top of the passage, and used spider silk to pull the horizontal stability line. In this way, they were hung in mid-air. They couldn't use the strength, and even if they wanted to shake it, it was useless, because the horizontal spider silk would play a stable role, and they could not shake their bodies that had been tied into a silkworm pupa.

After we fixed them, we immediately awakened three people. But these three guys were obviously not combat-type people. Not only were their clothes on them looked civilian. The most important thing was that these people could not feel any magic fluctuations, and they didn't even have much muscle. In other words, these people were not magicians, nor were they physically exerted. They could only be those relatively leisurely life professions.

The three people woke up and felt like they were about to shout, but soon they found that their mouths were stuck and they could only make whimpering sounds. Considering that there was a row of huge machines roaring above their heads, even the dog could not hear the movement.

Soon the three guys realized that their shouting was futile, so they finally calmed down because they had tried it, and besides shouting, struggling was also useless. The spider silk on their bodies was not hard, but they were amazingly tough and could not be pulled open and pulled. Even a warrior could only be hung there obediently, let alone their three bodies without the power of a chicken.

"It seems that you have realized your situation." Looking at the three people who stopped struggling, I walked over and said, "But you don't have to worry. As long as you cooperate well, I don't mind giving you a way out."

"Woooo..." One of them hummed as if he was about to say something.

I gestured for a moment, Kakuda Ichiro immediately grabbed the knife on his waist, pulled it out like lightning, and then inserted it back like lightning. He couldn't see his movements all the way. All he could see was that the knife seemed to be pulled out a little bit and then inserted it back. However, the spider silk on the mouth of the guy opposite was suddenly cut open.

I said calmly: "You have seen his knife speed, so if you can raise your own yelling speed more than he can cut off your neck, you can give it a try."

"Don't worry, we won't resist." The guy who was let go of his mouth and said tactfully, and the remaining two people nodded desperately to indicate that they would obey us.

"Very good, now I will ask questions, and you will say whatever I ask." As I said, I winked. Zhenhong and Jinzi immediately went up to free the other two people's mouths. "Now, he will answer. You two should not speak normally. If you think what he said is incomplete or has any mistakes, you can add it, but you will not be allowed to interrupt before he finishes. Do you understand?"

The three of them nodded together to show that they understood.

I smiled and said, "Yes, your attitude is very good. After asking questions, I will knock you out and still be here. When you wake up, you can leave by yourself. We just want to get something and will not destroy the place, so you can rest assured that your life will not be threatened."

The first point of threatening others is to not make the other party feel that they are helpless. If we say we want to destroy this underwater city, for their uncombat NPCs, it is basically equivalent to being sentenced to death, so we cannot make them think that they are dead. Only when they still retain the desire to survive can they be threatened and controlled by us.

"If you have any questions, please ask, and we will tell you everything we know."

"Very good. Then, first tell me your names and identities. Come one by one."

The three people immediately began to introduce themselves in turns, and then we knew that this sneak attack was really lucky and they caught three researchers directly. These three people were researchers in the mechanical transmission department and part-time technicians. The reason why they appeared here was actually related to the small submarines we saw before.

In fact, the submarines that were about to be dispatched were not three but four, but because one of the small submarines had a thruster stuck in the thruster, they failed to sail on time. The three of them had just been called to check the submarine, and after confirming the problem, they threw it to the technician to deal with it. The three of them were tied up by us on the way back to the institute.

This situation can be said to be very good for us, because they were invited to solve the submarine failure here, so the institute didn't know how long they would be out, and the submarine berths had completed the mission and left. The people there would definitely not go to the institute to confirm whether the three of them had returned. So, as long as the time was not long, no one would realize that the three of them were missing. The dock thought they were back, and the institute thought they were still repairing the ship. This was definitely a good situation.

In addition to the fact that the three of them are in very good condition, their identities are also good. Because they are researchers themselves, they are very clear about the location of the institute, and they can also clearly state the specific locations of each department in the institute and the approximate guard situation. If you find ordinary people, you really can't ask about these things. After all, the main responsibility of this underwater city is to act as a research base, so the institute must be the place with the highest safety level. Generally, NPCs cannot enter without the institute. Only those who are researchers themselves can know the situation inside.

After hearing about the identities of the three people, Kakuda Ichiro kept saying that we were lucky today and caught such three excellent tongues. This was perfect. Moreover, what made us very satisfied was that these three guys belonged to the extremely unconventional type. We didn’t have to say harsh words and surrender directly, without any intention of resistance. Of course, they are usually rarely tough. After all, they are not combatants at all, so it is normal to be timid.

"Since you are researchers, let us know where the institute is." I said and nodded to Christina. Christina directly reached out and combined it with energy in front of us to form a transparent channel model. Just take a look and you can tell that this is the channel we are in, the elevator shaft next to it and the passage above.

After completing these things, Christina immediately said: "You guys, I'll simulate the channel and mark me the channel from here to the experimental area."

The method Christina uses is like drawing a portrait of a criminal through the witness's oral description when the police questioned the witness. However, Christina uses not a pen but energy, and she draws not a portrait but a three-dimensional map.

Although the channel structure in this city is very complex, it is not a maze after all, so the rough channel diagram was quickly copied. From this we can see that our location is actually not very far from that side, but according to the route on this map, we may have to go through a lot of people and areas.

"Is there no other passage to go?" I asked.

"Yes, yes, but we don't know!" said the guy who spoke, "We just pointed out that the one we came to was the main road. We have no reason to put the easy-to-go road and go to those small passages, right?"

I have to say that what this guy said is very reasonable. If someone has a main road, who likes to drill small passages randomly? This is not like on the ground, you can also take shortcuts when taking some small paths. Although the maintenance passages in this place are well connected, the environment inside is harsh, loud noise, high temperature, and strange smell. In addition, some places are actually a little dangerous, so normal people will definitely not drill in those places.
To be continued...