After Tang Chen and the others were ready, they stood directly at the staircase on the fourth floor, and the faces of several people behind them were also quite grim.

I saw that after Tang Chen glanced at the position upstairs, he made a gesture, and the few people behind him immediately loaded their guns and prepared to start charging.

He knew in his heart that what had happened to them on the third floor must have attracted the attention of the people upstairs, and as soon as they probed, they might be greeted with a bullet.

But it can't be helped, that's their job, that's their task.

That damn system doesn't know what's going on, but it's suddenly gone, and when he reappears, he's going to have to settle accounts with him.

But now it is time to deal with the matter in hand, only to see that Tang Chen rushed directly when he thought of this, and the others followed closely behind.

But something unexpected happened to everyone, that is, when they climbed to the position of the fourth floor, they suddenly found that there was no one on the fourth floor.

Even as they walked through the hall, they could hear their own breathing.

Seeing such a situation, the faces of several people were a little ugly, which was really weird.

The faces of several people around him were a little ugly, especially after seeing Tang Chen's cautious expression, they were even more scared in their hearts, they had never encountered such a situation before.

I thought there might be a lot more enemies upstairs than downstairs, but when they came up, they didn't notice anyone.

"What the hell is going on?"

Yan Hongbing walked beside him and whispered to Tang Chen.

I saw that after Tang Chen heard this, he frowned and raised his hand, signaling Yang Hongling not to speak, but to let her footsteps go.

I saw Tang Chen like a cat, letting his steps go, slowly moving his body.

Then something suddenly came to mind, Tang Chen immediately put down the weapon in his hand, and directly blocked their way without waiting for everyone to react.

"Give me night vision. ”

After hearing Tang Chen's words, Yan Hongbing was stunned for a moment, and after flipping through it, he found that he didn't have a night vision device on his body.

Because it wasn't night at all because they came out on a mission this time, they didn't have a night vision device with them at all.

When he saw that there was no night vision device on everyone's body, Tang Chen's face was even more ugly.

Then, I saw Tang Chen raise his hand and signal everyone to step back.

But when they wanted to go back, they suddenly found that the location of the staircase on the fourth floor, that is, the security door, was slammed shut.

Everyone was shocked and wanted to push the heavy iron door open, but unfortunately it was locked, even if they didn't open it in a special way.

"You don't need to open it, the outside of this door is filled with glue, and it is also instant adhesive, so it can't be opened at all. ”

After hearing Tang Chen's words, Tang Lei, who was fiddling with the keyhole, suddenly had a slap in his hand.

Then he didn't wrinkle his head, knowing that they were now at the staircase on the fourth floor.

If some enemies rush out of it, they won't be able to escape even if they want to.

But what is surprising is that the entire fourth floor does not even notice a single sound, as if there are only a few of them in the entire city building.

I saw that Tang Chen's brows furrowed tightly when he saw this situation.

In fact, he just did it, and it hasn't been verified yet, but now it has been fully explained.

In other words, there are actually a lot of touch traps in front of them.

It's just that they didn't notice it at all during the day, so the mechanism wasn't opened, so they weren't hurt.

"TMD these people are really cunning, they even have touch sensors, and infrared. ”

Several people were not stupid, after seeing Tang Chen's cautious expression, and when they thought of asking for night vision devices with them, they thought of this possibility.

"On the first floor, I am a wolf brain, please answer when you hear it. ”

Tang Chen thought of the people on the first floor, so he directly used the walkie-talkie and started calling.

But what made Tang Chen more depressed was that no matter how he called, all he heard in his ears was the sound of some snowflakes, sizzling and swishing.

Tang Chen frowned and didn't continue to probe, if his estimate was good, then there should be something in this fourth floor that would affect the signal.

"Rest in place, pack your gear, and be prepared. ”

"Yes. ”

Looking at Tang Chen's cautious expression, the others didn't have any idea of resting to be honest.

But now they have to adjust their bodies to maintain their strength, as long as they have a minute to rest.

"What's going on? Can't you reach the people on the first floor?"

Looking at Tang Chen's reaction, Yang Hongling's brows furrowed.

I saw that after Tang Chen heard his words, he nodded and said, "I can't contact him at all, the signal has been blocked."

If I'm guessing correctly, this fourth floor should be a place where the signal is blocked.

And I have a hunch that something will definitely be there on this fourth floor.

Wait a minute, we have to be careful when we act, don't touch any mechanism, otherwise we won't be able to get out even if the king of heaven comes. ”

Yan Hongbing nodded fiercely, and then began to rest with everyone.

Tang Chen glanced at the surrounding furnishings next to him and found that there was a hallway about three meters away.

And this entrance turned out to be a door, so when he saw such a situation, Tang Chen strode over.

But when he took a step down the aisle, he was directly stopped by Yan Hongbing.

"What are you doing? Since there is infrared in here, do you want to die?"

Tang Chen smiled, looked at Yan Hongbing and said, "The person who wants my life hasn't been born yet, don't worry, I'm just going over to see if there is a Dao Gate in that place, and I'll see what the situation is." ”

Hearing his words, Yan Hongbing was stunned for a moment, then turned his head and saw the door like an entrance.

"Okay, I'll go with you. ”

Yan Hongbing was reluctant for Tang Chen to walk over by himself, looking at Yan Hongbing's reaction, Tang Chen was a little helpless, but Tang Chen did not refuse.

When the two of them walked to the door, they suddenly found that it was actually wooden.

And in this case, this wooden door should have some function.

But the problem is that they have all looked at the design of the whole building before they came, but the problem is that they have not even noticed the small door here.

When they saw the blueprints, the door wasn't there.

In other words, this door was added later, Tang Chen's brows furrowed tightly when he saw such a situation, and after a glance, Yan Hongbing beside him said, "This door doesn't even have a key!"