The movement of the falling elevator was so loud that the entire core column tower could feel a violent vibration, although Wang Yuanhai didn't know that Wilde had been killed by himself, but there would never be enough time left for Qi Lin.

Once Wang Yuanhai guessed that he might know something from Wilder, he might directly activate the defenses in the core pillar tower and kill him.

Moreover, Wild is dead, and Qi Lin's value in Wang Yuanhai's eyes will naturally drop a lot......

If Wang Yuanhai did something like crossing the river and demolishing the bridge at this time, Qi Lin would not be surprised at all.

Judging from the current situation, the elevator shaft should be safe, and due to the power outage on the eighth floor, Wang Yuanhai cannot be mobilized whether it is monitoring or weapons, as for the central control room on the ninth floor-

Qi Lin didn't know whether Wang Yuanhai showed him the saved images or real-time monitoring before, if it was the former, then for Wang Yuanhai, the central control room was also a blind spot in the field of vision, and if it was the latter, then it would mean that the central control room was under Wang Yuanhai's monitoring, and Qi Lin's actions were to be more careful.

At least, between finding the hard drive, Wang Yuanhai can't see through his intentions.

However, one thing Qi Lin can be sure of is that even if Wang Yuanhai can see the monitoring of the central control room, he definitely has no right to mobilize the weapons facilities there, otherwise, he will not need to let himself restart the system in the central control room.

Along with two 3D stereoscopic maps, there is also a compressed file package, according to the content of the task, as long as Qi Lin restarts any computer in the central control room, and then copies this compressed file package directly into the computer through the infrared transmission interface, his task is completed.

"This must be some kind of computer virus, right?"

The compressed file package, which is only a few hundred K bytes, was previously thought by Qi Lin to be a backdoor key of the central control room system, but judging from the current situation...... It seems to be a little more likely to be a virus.

Qi Lin's personal brain is a binding prop given to everyone by the main brain, although there is no need to be afraid of being infected by the virus, but if you want to parse this compressed file package, there is no way to do it.

Aside from providing information and storing data-based quest items, the Brain cannot have any impact on the game world.

Qi Lin recalled all kinds of things that happened after he entered the 404 base, and further affirmed his conjecture:

If Wang Yuanhai really has the backdoor key of the system, can the central control room be opened, at least at the entrance corridor, he should not watch himself pass by death, otherwise, the next person to enter the 404 base does not know that he will have to wait until the Year of the Monkey.

Coupled with the fact that the dying Wild asked himself not to trust Wang Yuanhai and found the computer hard drive in the central control room, what does that mean? Does it mean that Wang Yuanhai is actually a traitor to the 404 base? Still is...... Does it mean something else?

……

……

Following the rails in the elevator shaft, Qi Lin returned to the eighth floor of the core column tower again - although Qi Lin no longer trusted Wang Yuanhai, he still had to drill through the ventilation pipe of the air pump room to enter the central control room.

As the central hub of the entire core pillar tower and even the entire 404 base, the thickness of the metal gate is comparable to that of the central bank vault in the old era, even if the power of the directional door-breaking bullet in Qi Lin's hand is increased tenfold, it is difficult to blow it up.

After taking back all the equipment and props that were scattered just now, Qi Lin picked up the scrapped Gauss sniper rifle again.

Due to the difference in caliber and firing mechanism of Gauss sniper rifles, basically those common barrel fittings cannot be replaced, and it seems that the only way to go back to Persephone to reorder a barrel is to go back.

The original backpack was so broken that it couldn't be broken anymore, but fortunately, there were many corpses of private soldiers on the ground, Qi Lin casually picked a tactical backpack that was pleasing to the eye, picked it off and carried it on his body, and then put the props and supplies that he picked up into it.

As for those weapons all over the ground, Qi Lin didn't have any ideas, anyway, the ventilation pipe was so narrow, even this backpack would have to be left in the air pump room at that time, and it would be useless to take more weapons.

……

According to the pipeline structure diagram given by Wang Yuanhai, the No. 1 pipeline leading to the central control room was the No. 1 pipeline, and Qi Lin soon found the air pump machine with a huge "1" on the far left of the air pump room.

Putting his backpack and guns aside, Qi Lin walked to the air pump machine, which was a snorkel that was thick enough for two people to hug.

The ventilation pipe is divided into two parts, one part is a metal pipe buried in the building wall, the cut surface is a square with a length and width of 55 cm, and the exposed outside the wall is connected to the air pump machine is the black and thick rubber pipe in front of Qi Lin.

At the junction between the rubber pipe and the metal pipe, there are dozens of fixing bolts, even if there are tools, it will take ten minutes to unscrew them all, Qi Lin simply summoned the bone blade, directly opened a large enough hole in the rubber pipe, and then bit a small dagger and drilled through this opening.

The inside of the pipeline is indeed very clean, at least at this point, Wang Yuanhai did not lie to him, but every ten meters crawling in the pipeline, Qi Lin had to stop and remove the metal filter that blocked the way before he could continue to move forward.

After climbing through a fifty-meter-long transverse pipe, the pipe curved straight to the central control room on the ninth floor above.

Fortunately, the turning point of the pipe was an arc, not a ninety-degree right angle, otherwise Qi Lin would not have been able to drill through.

His hands and feet were clinging to the inner wall of the pipe like a toad, and his back was close together at the same time, Qi Lin maintained this posture, quickly going up along the vertical pipe, and soon climbed to the top of the pipe.

Now, there was only one last obstacle left in front of Qi Lin - that was a large blower fixed to the mouth of the pipe.

If you want to get out of this exit, you have to dismantle the blower first.

After transforming the firearm for so many years, Qi Lin quickly used the small dagger to disassemble the simple machine like a blower, and then threw it down the ventilation duct.

Dismantling the blower, Qi Lin kicked open the last metal strainer and entered the central control room of the core column.

According to the image perspective of the central control room that he had seen in Wang Yuanhai in his memory, Qi Lin looked up at a corner on the ceiling of the central control room, and sure enough, there was a surveillance camera there.

It's just that the red indicator light representing the working status is dim, that is, in fact, Wang Yuanhai can't monitor the situation in the central control room.

Qi Lin breathed a sigh of relief slightly, and in this way, it could be regarded as reducing a lot of pressure on him.

For insurance reasons, Qi Lin still threw the small dagger in his hand as a flying knife, destroyed the lens of the surveillance camera, and then set his eyes on the machine in the central control room.

These machines, unlike ordinary civilian computers in the old era, are connected to a large LAN server for ease of operation, and the data storage is a shared super hard disk, which is inserted into a two-person metal cabinet next to the wall.

Thinking that he was about to know all the secrets of the 404 base, Qi Lin's pace couldn't help but speed up a little - and at this moment, a Rubik's Cube projection composed of red lasers suddenly appeared in front of him, and the AI voice that had been lost for a long time also sounded again.

"Please show proof of your authority, or the system will activate self-defense facilities-"