Zhang Xiaohu and the others followed the West Pole and walked into the building along the opened passage.

Fierce fighting was still going on, and the building was equipped with a lot of defensive weapons and a large number of elite fighters, and each step forward required a stalemate for a long time.

After taking the serum, Xiji looked more excited, and rushed to the front with a weapon. Zhang Xiaohu looked at the corpse on the ground, worried about his future. Will he really be one of these engineers in the future? Could it be that one day, I will become so neurotic and so dark?

He pondered for a moment, then was awakened by the sound of a violent explosion. Now is not the time to think about this, it is necessary to seize the time to rescue those classmates of you, and more importantly, to recapture the machine that was taken away by Number 4, so that you can activate the teleportation machine and send your classmates back to Earth.

It's just that they've been in this building for a long time, and they haven't found anything unusual except for the unusually tight defense here, it seems that this is just a factory used to make cyborgs, from the 1st floor to the 7th floor, dozens of production lines are connected to each other, and they can continuously produce biocyngers.

Looking at the huge glassware around them, which were filled with various colored liquids, in them, there were cyborgs of different stages. Zhang Xiaohu has never understood the origin of cyborgs, but this time he finally witnessed it with his own eyes.

These cyborgs start from a tiny artificial embryo, and after a series of nutrient solution soaking, the embryo is matured and various cells are strengthened, and then the unqualified biochemical human shells are discarded into the collection bin below through the detection of the machine, and they are uniformly processed.

Zhang Xiaohu finally understood why there were so many corpses piled up outside the city, I am afraid that a considerable number of them were failed cyborgs, no wonder they would be discarded outside the city at will. Because they weren't living beings at all, they were just ordinary mechanical products.

But what puzzled Zhang Xiaohu was that No. 4 already had so many cyborgs, why did he have to keep producing them, in Zhang Xiaohu's memory, the combat effectiveness of these cyborgs was really not commendable, except that they were a little difficult to deal with after transformation, they had no advantages. IQ is the biggest problem restricting their combat effectiveness, but No. 4 has not been reformed in this regard.

The battle damaged a lot of facilities, some glassware was broken, and there were all kinds of liquid flowing on the ground, which were extremely viscous and smelled sweet, which was not too unpleasant, but Zhang Xiaohu and the others had already put on gills to prevent harmful gases from appearing in the air.

The building's defenses were cleared, albeit a little longer.

The victims searched the entire building, except for the production lines that had stalled, were neatly arranged cyborg bodies, which could only be regarded as shells, not real life, until they were injected with simple thoughts.

But it's such a factory, why would No. 4 put so much effort into arranging defenses, Xiji made preliminary statistics, in order to conquer this factory, she sacrificed at least eight or nine hundred excellent soldiers, and this battle loss ratio is already higher than the previous losses in other places in the city.

There must be something here that they have negligently not discovered. But where is the real secret?

Looking at the people around him running around looking for a hidden place, Zhang Xiaohu took out the map and tried to find some clues on it, but it was strange to say, only when he entered the building, this leather map would become an ordinary piece of leather, and there would be no abnormality.

It seems that if they want to find the secret room, they still need to search for it inch by inch.

These sacrificial warriors did not have the slightest delicate and delicate woman, and they brutally used the weapons in their hands to wantonly destroy the walls in front of them, trying to find some clues in them.

This kind of behavior is incomprehensible even Zhao Zixuan, who has always liked to punch hard, this kind of behavior is not bad if it is just to vent his anger, but if he uses this method to find the secret room, he is destined to have no gain.

The building shuddered slightly, proving that the battle was still going on outside, and the longer they stayed here, the more likely they were to have other problems.

"Lao Zhang, could it be that we are wrong, this is a factory, not a general experimental base?" Zhao Zixuan looked around and asked.

"Maybe!" Zhang Xiaohu was also a little hesitant, he was not sure what the symbols on the map meant, but he just took it for granted that this was the General Experimental Center, and at present, this place did not meet the requirements of the General Experimental Center at all. Unless... He suddenly had an idea, and said to the West Pole: "Commander-in-chief, is there another mystery underground?" ”

The West Pole's eyes lit up, and he immediately ordered the direction of exploration to be concentrated underground.

With the right direction, it was quickly discovered that under the ground on the first floor, the fallen fighters broke through the ground with the drills they carried, and soon found a layer of metal-covered ground.

They continued to search along this level of ground, and sure enough, they found a closed secret door. The door is large in size, cast in a sturdy alloy with a hexadecimal combination lock mounted on it, which cannot be accessed by external force alone. What is hidden under this secret door is the core and most secret here.

However, this combination lock is very difficult to crack, fortunately, there are advanced equipment in the West Pole, they bypass the combination lock, through the assistance of the machine, release a strong energy flow to the door, under the huge energy impact, so that the password lock enters the crash state, the system will instantly enter the restart state, in this short time, through the interference of external equipment, open the door. It's easy to say, but it can't be achieved without the corresponding machine cooperation.

After the door opened, dozens of heavily armed biochemical warriors immediately rushed out from inside, and Xiji and the others had already prepared, and immediately killed all these dozens of biochemical warriors, and after removing the corpses, the passage below was revealed.

Bursts of cool cold air came from inside. Xiji frowned and said, "The temperature is so low, there should be a teleportation room down here?" ”

Chen Yi also said: "If there is a teleportation room, it means that even if it is not the general experiment center, it is an extremely important place, we must be more careful next, such a place should not be underestimated!" ”

A group of fallen warriors entered first, surveying the situation ahead, and soon they had a harvest, with two teleportation rooms underneath and a secret door, behind which seemed to be a cell.

Zhang Xiaohu said excitedly: "Great, maybe the prisoner is the one who was arrested!" ”

However, Xiji said coldly: "This is not the General Experimental Center, No. 4 will not establish the General Experimental Center here, there must be other people locked up there, and it is a very important person for No. 4!" ”

It is useless to say more, the secret door is in front of them, and they must open it immediately.

Suddenly, the West Pole's watch vibrated and someone was connecting her bands. She hesitated for a moment, and after connecting it, No. 4's angry voice came from inside: "There is nothing you need in there, I will return everything you are looking for, I will agree to all your conditions, but you don't want to enter that cell!" ”

Xiji sneered: "Maybe that's what I'm looking for!" ”

No. 4 shouted some strange words, Zhang Xiaohu didn't understand a word, but saw that Chen Yi's face also showed some strange expressions, and he asked in a low voice, "What do you mean?" Why are you all so ugly! ”

"A hundredth of the meaning of a word that our planet insults others cannot be described in your most vicious words!" Chenyi explained.

"Hehe, this guy is so annoyed and angry, even I wonder what is behind this door!" Zhao Zixuan had an expression that he was not afraid of making a big fuss.

The same thing, Zhang Xiaohu seems to have experienced it, he recalled a little, not long ago when he was in the serum bank, No. 1 also succumbed to the West Pole in this way. Fate is like this, these people once collaborated to harm the West Pole, but in the end they all lost to the West Pole.

Xiji turned off his watch, interrupted the call with No. 4, and said with a smile: "I'm starting to be curious about what's inside the door, let's open it!" Following her order, the lockpicking experts of the Legion of the Victims continued to step forward. However, this secret door is more repetitive than the previous one, with more than a dozen locks on it, and other safety devices are extremely difficult to handle.

In the end, it took more than ten minutes to crack all the mechanisms.

After the secret door opened, everyone's faces changed again, and there was an alloy door installed inside, and all the mechanisms were different from the previous one. What's more, an attack system is added to this secret door, which will release a powerful current from time to time, and the slightest carelessness will kill you.

But the more this happens, the more it proves the importance of what is behind the door, and Xiji really can't think of any person or thing worthy of such painstaking guarding by Number 4.

A female warrior ran in from the outside and reported: "All the cyborgs in the entire city seem to have received some kind of order, and they are all frantically converging in this direction, and the defense outside is very difficult, and it can withstand for more than twenty minutes at most!" ”

Yan Cannon glanced at Xiji and said with a smile: "You guys are here, I'll go out and have a look!" With that, he left with a few guards.

Xi Ji hurriedly said: "I don't care what method I use, open him in five minutes!" With her order, the warriors of the victims immediately accelerated the speed of cracking, and they were not afraid of death, and they devoted themselves to cracking the mechanism. After paying the price of the sacrifice of the four, they finally cracked the secret door.

Behind the secret door, there was a white room, and there was only a silver-white metal bed in the room, and on the metal bed, a thin, frail man sat in a silver-white dress. The man had been held here for an unknown amount of time, and he looked malnourished, but his eyes were shining.

After the man saw a few people in Xiji, he glanced at Zhang Xiaohu meaningfully, and said, "You are finally here, I have been waiting for you for a long time!" ”