Several men in white looked at each other, and one of them leaned down and checked the security guard's breath and pulse.

He shook his head, pointed at the security guard, and pointed his thumb in the direction they came from, meaning "go back."

Their movements were very gentle, and they didn't make any loud noise from beginning to end, and no one spoke. The room was quiet as if nothing had happened.

Only Chu Yao knew that these people did not take the initiative to keep quiet, but that their lips were sewn up with needles and threads.

Those rough red lines crookedly passed through their lips, accompanied by proliferated and extremely ugly scars, which showed that they were not sutured by professionals.

If you want to make someone unable to speak, there are many ways to do it, including poison and surgery, without leaving any traces.

Since such cruel methods have been used, it is even less likely that anesthesia will be used.

They were awake, watching helplessly as the needle and thread penetrated their skin, and endured the great pain it caused.

This is a punishment and a warning given by someone, and it is also a humiliation.

Moreover, these people have one more obvious thing in common - death aura, a very strong death aura.

This was not the first time they had done this. Although most of the security guards who were carried down were still alive at the moment, they would soon turn into corpses.

Chu Yao jumped closer. The lockers in the security room had been removed, revealing a bottomless downward staircase.

They carried the security guard and walked down slowly.

When the last person left the room, the lockers returned to their original positions.

After making sure there was no one around, Chu Yao got into the security room. She raised her paw and patted the heavy locker.

There are no trigger devices on the nearby walls. This is a mechanical door that can only be opened from the inside.

According to Chu Yao's current strength, it was impossible for her to directly break the door violently, and the noise would be too loud, which would definitely attract others' attention.

A faint smell passed into Chu Yao's nose, and she sniffed it carefully.

Like a corrosive acid with a hint of green apple smell, it was hidden in the gap between the locker and the wall.

Although it was not very obvious, Chu Yao still noticed a few drops of indigo traces on the wall.

She recalled that it was the person in the lab coat who had injected the dead security guard with cyan liquid, and there were still a few drops left in the syringe.

He shook it casually a few times and shook out the cyan liquid inside.

Only a few minutes had passed, and the liquid had rapidly oxidized and changed color.

Although Chu Yao couldn't open the door behind the locker, she was not without gain.

She saw that there were dense passages under the floor, like a huge and complex maze.

The men in white carrying the security guards passed by the basement level. They did not stop, but continued going down.

With so many roads, there can't be only one entrance on the ground.

Thinking of this, Chu Yao immediately ran in the other direction of the passage connection.

The wind whistled in my ears, as if a ghost was crying resentfully, hating myself for dying early in the purgatory on earth.

The first fork in the road appeared. There was no longer one underground passage, but extended to four directions, which happened to correspond to the three larger buildings and the security room in the orphanage.

There is a dormitory aunt in the dormitory to check the dormitory, and the only thing left is to choose one from the teaching building or the cafeteria.

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