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Although it had been expected, the depth of the underground research room was still a bit unexpected by Zhang Xiao. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

By feeling, he estimated that he had gone about twenty meters underground.

After carefully walking down a few more steps, I finally reached the end of the stairs, and the metal texture of the wall of the corridor disappeared, and I felt the slightly rough stone surface.

At this time, Zhang Xiao felt that he had gone nearly thirty meters underground.

I really don't know how those people dug up such a big project, but only a world-class big city has the strength to build an underground project.

The largest underground project in the city is generally the urban drainage system, especially in the international and world-class large cities, and the huge urban drainage system is almost equivalent to an underground city.

For example, the sewers in Paris are 50 meters below the ground, and the sewers in Tokyo are more than 60 meters deep, both of which are underground corridor-type urban drainage facilities that collect and treat domestic sewage, industrial wastewater, natural rainwater and other urban wastewater, which are not only complex, but also huge, and even cars can drive in.

It is a non-international large city and does not have enough industrial strength to build such a project.

Sheo Town is just an ordinary neon town, and the sewers are only three or five meters underground, but it is unbelievable that the underground research institute of Dongfang Shosuke and these people in Sheo Town can reach 30 meters underground.

This made Zhang Xiao even more vigilant, either Dongfang helped them to master the industrial strength far beyond his cognition, or they had a special stand-in in their hands and could easily dig out such an underground space.

Either one is not to be underestimated.

If they have this strong industrial strength, it means that their power in the world is amazing, once Zhang Xiao fails, even if he can leave safely, he is likely to be forced to heaven and earth.

And if they have a stand-in that can easily change the terrain, it directly represents a powerful range attack ability, which means that once his tracks are exposed, he is likely to be buried in the ground at a depth of thirty meters in a short time.

It seems, it's just the difference between dying late and dying early.

"So, I must not be discovered until my purpose is accomplished."

Walking down the stairs, a small room appeared in front of me, empty and empty, except for a large metal door on the facing wall.

That door is not as exaggerated as the vault door in the movie, there are electronic locks, combination locks, and the door is the same as this room, it is also bare, but you can feel the cold texture in the dark.

This is a pure metal door, or metal plate, it has no lock at all, not even a keyhole, and it is perfectly embedded in the wall, blocking Zhang Xiao's path.

"Can it only be opened from the inside?"

Zhang Xiao frowned, this is not easy to do.

He could think that this place must have a way to communicate with the inside, and he also touched the electric light at the top of the long dark corridor just now, but he sneaked in, of course he couldn't turn on the light so loudly, so it was impossible to find a way to call the people inside to open the door now.

No, it should be said that he shouldn't have entered through this door, and there is no reason to sneak into the main door.

It is likely that the research room is located behind this door, and it is hard to imagine that there would be no dedicated security personnel, especially near the gate.

So, what's the difference between taking the front gate and storming?

Zhang Xiao shook his head, put away the idea of making a crack in the door, and then relied on the shadow to move in, changed his thinking, and began to think about what to do to sneak in.

"This underground research room, the secrecy has reached the extreme, just look at this door, you can see that if the people outside want to enter, they must need the people inside to cooperate with the opening of the door, I'm afraid that it was also an inspection at that time, and it is not realistic to want to get in."

"It's not feasible to sneak in disguise, so you can only look for security vulnerabilities in this place, which is not easy."

Looking around the whole room, except for the corridor and the relative metal door, there is not even a hair at all, where can the security vulnerability start?

This place is 30 meters underground, and it is not practical to dig a hole from above.

"Underground...... Ground floor...... This place is specially avoided in the direction of the sewers, and I am afraid that it is also a safety concern. ”

The other party is really leaky about security.

Zhang Xiao gradually became a little anxious in his heart, but soon, he realized that he was wrong, and the red cloud on the Shura knife in his hand rolled, and the extreme restraint completely swallowed the anxiety.

Brushing away the dust of the spiritual platform, the soul regained calm, although the air in this place was dull, but Zhang Xiao's whole person seemed to be suddenly washed, and there was a feeling of going to the wilderness and breathing fresh.

"Whew...... Suck ......"

Breathing slowly, Zhang Xiao suddenly realized the "way".

No, it should be said that there is a flaw in this underground research institute in front of us.

"Air circulation...... In this space where I am still connected to the outside world, the air is no longer fresh, so it is impossible for the institute to share the air with here, and there must be another set of air circulation and filtration pipes in it. ”

This is inevitable, unless any underground facility is directly connected to the ground, there will be a special air duct, not to mention the research institute in front of you, whether it is for safety reasons or necessity, there will be a special hidden air duct connected to the ground.

Zhang Xiao searched carefully throughout the room, and did not find the existence of air ducts in this room that was clear at a glance, but he was not discouraged.

"Although the existence of air ducts is not visible in this room on the surface, it is unlikely that in the research institute, whether it is artificial construction or stand-in, it is impossible to open an air passage to the outside world from another direction in the research institute, and most of the air ducts should be parallel to the metal corridor, at most there is only a diversion when it is close to the ground."

Zhang Xiao thought about it, returned to the metal corridor, and began to test the space behind the metal corridor inch by inch.

There are electric lights on the metal roadway but no wires in sight, and it is obvious that there are hidden power lines behind them, and similarly, there are probably air ducts hidden behind them.

He didn't use a tap, which might have been quick, but it was too easy to expose in this quiet place, but he had the same quick way.

Shura knife leveled, Zhang Xiao closed his eyes, calmed down and completely spread his mind to the knife, and with a movement of his mind, the blade of the knife shattered like an weathered stone, and after a while, it completely turned into thin almost invisible ashes, with his mind, floating in space.

Most of the vaporized Shura knives surrounded Zhang Xiao's body, and although they were small, they were still very conspicuous when gathered together, like fog and smoke, like red clouds.

However, there is also a small part of the outermost part that is really invisible, only faint, which seems to reflect the air red, and it seems to be just an illusion.

Under Zhang Xiao's thoughts, these gasified tiny blades surged towards the welded interface of the metal corridor, only flickering slightly, and these tiny blades that were difficult to distinguish with the naked eye destroyed and drilled into the welding port of the metal corridor.

Most of them were walking in the mud, it was the stone behind the metal tunnel, the stone thirty meters below the ground was extremely hard, and in a short time, this small part of the vaporized blade ran out of strength and returned to the Shura knife itself.

But there are also some different feelings for Zhang Xiao, he feels the thin wires, and he also feels the existence of water pipes, and then, it is his goal......

"Found it, air ducts."

Zhang Xiao opened his eyes, and in the shadows, he disappeared in just a moment.

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