The two of them acted quickly, and when they encountered some zombies, they tried to avoid them, and they reached the fiftieth floor smoothly.

The two continued to shuttle in the corridor, and soon came to a metal door under the leadership of Zhang Zimo, the material of this door is different from other doors, it seems to be made of high-strength alloy, and there is a big disc in the center of the door, with a lot of buttons on it, you can know that you need a password to open this door.

The two stopped in front of the door, Zhang Zimo immediately knocked on the lock, some zombies gathered here, more and more in number, Mo Xiaoxian knew that the more zombies went downstairs, there would be more and more zombies, and now his ability was not strong enough, so he still had to leave some energy to use as a life amulet, so Mo Xiaoxian did not use the ability again, but directly untied the AK on his back and shot at the zombies rushing over.

But the movement of the shooting was loud, a group of zombies fell, and soon another group of zombies rushed over, but Mo Xiaoxian was not worried. She believed that Zhang Zimo would be able to open the door soon, the fact was that Zhang Zimo did not disappoint Mo Xiaoxian, and when the door was opened, Zhang Zimo immediately turned around and helped Mo Xiaoxian kill a few zombies that were close together, and then the two retreated to the door together.

Then the heavy mechanical door closed, completely blocking the zombies from the door, and even the zombies scratching the door could not be heard, this door was really thick, Mo Xiaoxiao relaxed a little, and then turned around to look around the main ventilation room.

There are almost no miscellaneous facilities in the main ventilation room, the layout of the whole space is simple and clear, which is completely for the convenience of operation, there are various control instruments and testing instruments in the room, and all kinds of buttons on the instrument are neat and tidy but because of the excessive number of people are dazzled. There is also a large horizontal screen on the middle of the parallel instruments, which displays the data of various air tests.

The instruments here are basically running automatically, there will be no major problems, and the base also sends special personnel to check the operation of the machines every week before leaving. Because this underground experimental base is too large, and the air required is also a lot, so at the beginning of the construction of this experimental base, a large main ventilation duct was built with direct access up and down, and the air from other layers was supplied by the small ventilation duct connected to the main ventilation duct.

It can be said that the ventilation system of this underground experimental base is tree-rooted, and the structural design is very reasonable.

Zhang Zimo saw that Mo Xiaoxian's dark pupils had been shining after he came here, and his expression was a little fanatical staring at the instruments here, and the corners of his mouth twitched helplessly, how did he feel that this woman was not here to escape for her life, but like a thief.

Not to mention, Mo Xiaoxian is very interested in mechanical science and technology, I really don't know who the designer of this underground experimental base is, and these exquisite instruments, it is a work of art in Mo Xiaoxian's eyes, if it weren't for this zombie crisis, Mo Xiaoxian really wanted to find a chance to sneak in here and steal a teacher.

When Mo Xiaoxian looked at the instrument here, Zhang Zimo had already opened the door of the main ventilation duct, and immediately a fresh breeze blew in, making Mo Xiaoxian take a few deep breaths of fresh air. Since she woke up, there were zombies everywhere, and there was always a rancid smell in the air, but now that she finally breathed fresh air, she suddenly felt a lot better.

Zhang Zimo was standing in front of the door and looking down, his hair was blowing in the wind, Mo Xiaoxian walked to him silently, looked down, and suddenly felt that this forced to go down, this is too high, you can't see the low at all, some only have a vertical straight ladder, and there is no rope, this is 50 floors, and the bones are broken when you fall down.

Zhang Zimo just looked at Mo Xiaoxian and took the lead in climbing up the straight ladder and climbed down, Mo Xiaoxian swallowed her saliva and gritted her teeth and climbed down.