Approaching carefully, Li Huan found that these concrete buildings had steel bars on the outside. However, by this time the steel bars had rusted to the point of not being in shape. But I have to say that in that era, the construction of this confidential document repository at any cost did use a lot of new technologies - for example, those metal objects used as stairs to inlay cement houses, although they looked overwhelmed, they seemed to have some kind of ingredient added to them, so although they looked too sturdy, they could still withstand Li Huan's careful climbing.

After going up to one of the buildings, Li Huan was disappointed, he looked through the hall, and he couldn't find a place like a database filing cabinet. However, Li Huan was not discouraged, since the light of the flashlight could not reach so far, there was also the night vision mode of the handset. Li Huan said just do it, called out Xiaofei's handset to switch to infrared night vision mode, and the facts were displayed on his virtual screen, so he could see everything in it.

The hall is flat, and in the middle, on the ground near this side of the pool, there are two small hoisting machines, and between the two hoisting equipment, there is a railroad track that leads to the depths of the base. Since this is a secret archive, there must be a lot of things stored, Li Huan probably understood how this underground base was established after watching it for a long time - Li Huan even found a cable on the wall.

Well, there should be cables, maybe there is a generator, otherwise how did the fused door open? It can't be every time it's no wonder that thermite comes to burn it, right? Of course, it's very annoying to see things with night vision, a piece of green is like making a horror movie, and Li Huan's body, except for the range of the spotlight, can see things, other areas are still black and you can't see your fingers, this kind of darkness makes Li Huan very annoying, so the top priority now is to find a power hub similar to a generator.

The hall was empty, except for what resembled a freight railroad track, facing down to darker places.

Li Huan thought about it, and did not continue to observe the environment here, but walked along the railroad track, but the further he went, the narrower the base became, and when Li Huan walked out of more than a hundred meters, the volcanic pipes on both sides that could not be seen had been rapidly narrowed to almost seventy or eighty meters, because when Li Huan looked left and right, the spotlights were already able to shine on the reinforced concrete walls on both sides.

Well, it's also specially fortified.

Along the way, Li Huan noticed some details - there may have been a large number of documents stored here as a document inventory. As the tunnel walked inward, boxy concrete buildings about three meters high appeared on both sides of the road marked in ancient Hebrew - Li Huan looked at them one by one, and most of these signs were the names of countries and regions, and even some people's names. These are supposed to be things that the Retreat has on file. Although Li Huan promised Abel not to look around, he couldn't help but be curious in the end, and opened the metal door of one of the concrete buildings.

That's right, every concrete building has a metal door.

The material of the metal door is the same as the door of this database, which is made of copper alloy, and Li Huan pulled it down, and immediately shook off the green patina on the ground. Li Huan opened a door and looked inside, in this concrete building with a length and width of three meters, there were "shelves" made of rocks, and there were some unrecognizable displays on the shelves.

Li Huan couldn't help but be curious, and reached out and took out one.

It is a beetle-like gold artifact, somewhat similar to the Egyptian scarab beetle, except that it is hollow on the inside, and the back is polished with green crystal, except for the gold body. Inside this fist-sized beetle, there is also this black thing that I don't know what...... Li Huan sensed it with his spiritual power, and he was still divided

Unrecognizable - this should be an important item at some historical point, so it's better than collecting it here. Li Huan thought about it and put the beetle back on the shelf as it was.

If it's like this, it's a good Aztec name, isn't it?

But along the way, I saw the names of all places, but I didn't see the Aztecs. It wasn't until the terrain opened up again that the number of houses began to increase, and this time there were some larger houses, with more detailed markings. The houses seem to be made of reinforced concrete, and they are supposed to be places to store various documents and objects, and they look extremely sturdy. The houses had no windows, and the only gates were almost all tightly closed, all of which were heavy-looking alloy gates.

After about 150 meters, a row of reinforced concrete houses in front of you blocked the front. These houses were all connected to the side walls of the base, blocking Li Huan's way.

Looking left and right, Li Huan found that this row of houses was about fifty meters long, with a total of six huge stained glass windows, and three alloy gates, all of which were tightly closed, but from the west wall of this row of houses, Li Huan found a row of cable bridges extending from a square hole in the wall of the house, and the thick cable was obviously a power cable.

This discovery made Li Huan a little happy, it was obvious that there should be a generator or something like this row of houses - and what made him even happier was that this place was equipped with so many of the most advanced technologies at that time around 1910, which shows the importance of this place when it was designed and built. The three gates were all closed, and they were all locked from the inside, but this couldn't help Li Huan, there was no danger of seawater backing up after the damage here, so Li Huan directly picked up the orbald copper knife and smashed it.

In just one moment, an alloy gate was scrapped. Li Huan lifted the scrapped gate, his hand sank slightly, he sighed lightly, looked down and looked, this alloy gate was nearly twenty centimeters thick!

What are they protecting?

Li Huan walked into this row of houses and found that these rooms were very spacious, with a lot of desks and office chairs and other things in them, and it was obvious that this row of houses should be the key point of the entire database.

The houses are connected to each other by doors. However, none of these internal doors were closed, or some doors were closed but not locked, which allowed Li Huan to easily walk to the westernmost room. Sure enough, in this fifteen-meter-wide house, there were a total of four generators.

That's right, generators, generators in 1910.

The 3-meter-tall, 22-tonne two-phase giant generator was designed and built by Citi in 1882 and has a maximum power of 500 kilowatts. This number is really nothing in modern times, and even the power supply of a community cannot be satisfied, but in that era when there were only electric lights, it was enough to light up the whole city!

What is hiding in this place, asking for such a giant generator?

The giant generator had been dormant for an unknown number of years, covered in rust, and the rotors inside were rusting to death...... Li Huan shook his head, and was about to give up this generator, but under a spirit, a wave of aura gushed out of his hand, and he began to say that no one would believe it, using aura vibration as "ultrasonic cleaning", carefully cleaning the rust in the machine - why, since there is a generator here, according to this construction design, the most secret thing must be related to electricity. Li Huan found the outside from the inside and found a feature, that is, the marks on the small houses outside were all relatively clear histories recorded in history

Countries and people, in other words, archives and documents that have a huge amount of suspense in history, not a single one has been seen.

Then it can be understood that these things are protected by the latest technology of the year. In other words, if Li Huan wants to find these things, he must first let this place have electricity.

But fortunately, the quality of this generator is really good. After Li Huan tossed for a while, the rust had not fallen apart after it was cleared. This is also thanks to the three alloy gates that are so tightly closed that they isolate the moisture.

Li Huan continued to investigate forward, followed the four cables that were the thickness of an adult's calf extending from the large generator and groped forward, and finally converged into a large control cabinet in the corner of the southwest wall, and then seven or eight more cables stretched out from the control cabinet and stretched out through the square hole in the wall. There is also a thinner cable that extends from the north wall, and it is clear that there should be a place for electricity to the north of this row of houses.

In addition, each of the four generators has a steel pipe the thickness of an adult's thigh extending from the north wall, and these four thick steel pipes are supposed to be the air intake pipes of the four generators. The inside of the pipe is quite dry, even if it is in an underwater base and no one has been here for decades, but it is still quite dry.

Li Huan checked it, and the condition of these cables is still very good, and there should be no leakage or anything like that. After Li Huan checked the wiring of the room, he took out a large barrel of diesel from the virtual space, ready to pour it into the generator and let it start. Since Li Huan's virtual space was vacated, everything was loaded, and arms were indispensable, but it was used up during the rainforest battle, and this barrel of diesel fuel was also made out of the equipment dropped by the Mo ** side, and at that time he was also thinking of setting fire to resist the insect swarm, but he didn't use it at that time, and now he uses it.

After pouring the diesel fuel into the generator, Li Huan found the start switch.

Well, to say that the switch is inaccurate, it's a huge handle. This is a multi-person linkage, lever principle handle, look at the length should be ten people together to start the generator. Li Huan twisted his waist and grabbed the handle with both hands. The generator hadn't started for a century, and the battery inside had long since run out of power. But not to mention, Citigroup's manufacturing process is really good, even if this generator has not been started for at least a century, but after Li Huan shook it for more than 20 turns, it finally started "suddenly".

After the generator moved for a while, Li Huan found the control switch, and after turning it on, most of the base was lit up, and the row of rooms was also lit up.

The coming of light is always a very comfortable thing.

This row of houses has three copper alloy doors facing south, i.e. in the slipway, but only one door in the north direction. Li Huan opened the door from the house and walked out, only to find that the base seemed to be about seven or eight meters away from the back of the house.

The entire wall here is all heavy reinforced concrete, unlike other parts of the base, where there is only a small part of the reinforced concrete, Li Huan estimates that reinforced concrete is used around the perimeter in order to strengthen the base. Including the few steel bars that Li Huan once saw on the sea level, they should be the reinforced concrete used to strengthen the cave, but they were accidentally discovered by themselves, and then followed this clue and finally found this base.

However, the wall in front of me, which is five or six meters high and fifty meters long, is all made of reinforced concrete. In the middle of this wall, there is a circular copper alloy door, which looks a bit like the watertight door on a ship or submarine.

How could there be such a copper alloy door with excellent sealing on this wall?