Although Xue Lang has not touched new high-tech products for two years, he has seen the alarm equipment here.

Those human motion sensors, infrared human body detectors, are all things he was familiar with.

These devices have a common feature, that is, for the human body, even the infrared detector is the same, and the reduction of the radiation source of the human body can ensure that the alarm is not triggered, but the alarm will not be triggered because of a rabbit, a dog or a wolf.

And the motion capture alarm, of course, is also designed according to the human body, and it will not be called by a random mouse, so it will not become an annoying harasser?

Zhang Bin didn't ask much, turned around and left, in addition to avoiding radar equipment such as scanning to capture the figure, he still had to crawl back along the trace, the speed was no longer too slow, after all, the alarm equipment along the way had been removed.

Xue Lang continued to move in one direction near the edge of the sinkhole, quickly removing the dynamic and infrared alarms so that he could see everything in the sinkhole and avoid missing anything.

Xue Lang's movements were very fast, and without waiting for the liquid nitrogen to be sprayed, he dismantled all the human body infrared induction alarms in a circle, confirmed that those bunkers not far away were indeed empty, gave up the plan to get closer, and the moment he returned to the starting point, Zuo Boyang of Liu Defeated City and they all arrived.

To Xue Lang's surprise, those wolves still didn't follow when they disappeared, or the two or three who were watching their direction from a hundred meters away, but they didn't approach.

Became a sperm......

Xue Lang shook his head secretly, and then began to assign tasks.

Everyone will put down their backpacks, march carefully and secretly, rely on their ear power, accurately judge the location of the air inlet, quickly take out the climbing rope, tie the spray bottle of ylang-ylang incense to three ropes, and tie the strap made of rags removed from the Geely suit, and slowly put it down.

Xue Lang and Zuo Boyang slowly touched the opposite side of the vent, Zuo Boyang quickly prepared the big bow, and the special arrows were also ready, waiting for the work of the four people on the opposite side to be completed.

According to the judgment of the pumping force of the vent, it may not be able to suck in all the ylang ylang incense sprayed more than ten meters away, and he does not dare to ensure that the concentration is sufficient, and the people inside will fall asleep when they find the fragrance, so Xue Lang adopted this method.

Although the suction force was very weak more than ten meters away, the air flow was still flowing, and the strips of cloth that were five or six meters long hanging under the spray bottle were slowly tilting towards the exhaust outlet in the flowing air.

As the altitude decreases, the inclination becomes more and more severe. As it gets closer to the windy area, the degree of inclination is greater, and it is slowly pumped straight and sucked directly by the air intake.

Xue Lang stared closely at the movement of the strip of cloth, and saw that the suction had captured the strip of cloth, so he made a gesture of quick release.

With Xue Lang's gesture, the flying eagle who was in charge of observation followed the instructions, and the four people who put the rope quickly put the rope down, and stopped the action when the cloth strip was pulled by the exhaust fan mouth, and the bottle was less than five meters away from the exhaust outlet.

The spraying bottle has already slowed down, but the amount of three bottles is still rich.

The endless aroma is sucked in by the wind and quickly transported to the various pipes.

The moment Xue Lang gave the order to stop, Zuo Boyang moved.

The big bow quickly opened, and with a bang, a sharp arrow flew straight towards the rock wall further inside, and with a bang, the special sharp arrow shot into a small gap less than two meters below one of the vents, and pierced deeply.

Then, Zuo Boyang's method of connecting arrows, one by one sharp arrows flew over, and in the sound of dodling, all sharp arrows were nailed to the rock wall.

Those special arrows are specially treated, hard and sharp, and ordinary rocks can shoot into a shallow one or two centimeters without bouncing off, let alone cracks.

Behind the arrow, there is a tubular stamping device, which, when hit, opens the valve and spews out the gas inside, which is ylang-ylang.

There are only six of these arrows, and the amount of one plus one is less than one-third of the spray bottle, so it can't be used to put all the air intakes. But it's enough to deal with the two below.

Seeing that all six arrows were inserted under the vent, Xue Lang paused for ten seconds before giving the order to infiltrate.

The wind power of the exhaust fan will pump away the ylang-ylang, and no matter how bad the wind speed is, it will be more than 20 meters per second, and even if the base is large, more than 200 meters in 10 seconds, it has almost reached all positions.

Besides, as long as it acts on the command center, those sirens will be left unattended, and those who have not been taken care of for the time being from a long distance will not care about Xue Lang's infiltration, and they will not know at all.

With Xue Lang's order, the connected rope was quickly put down, and then, everyone quickly armed, and slid down the rope quickly, and in just a few breaths, they arrived at the bottom of the sinkhole.

More than ten meters from the ground, Xue Lang and Zuo Boyang jumped down one after another, and rushed to the location of the portal like lightning, followed by Yilanxiang, who pressed the fast gear, and stuffed it into the shooting port on the door, and stuffed it into the shooting port a few meters away next to it.

The rich aroma quickly spread, and then someone exclaimed, and then the chaos sounded,

Xue Lang was in a flurry of panicked footsteps and shouting, and in the sound of falling to the ground one by one, he began to study how to break the door.

The door here is pure metal, the thickness does not seem to be thin, and there are no locks, apparently only the inside can be opened.

Inside, there was no movement in just a second or two, and at the moment when they all arrived in Liu Defeat City, Xue Lang pointed to the iron gate and asked, "Moon Fox, can you cut off the lock pin?" ”

"I'll try."

At the moment when Zhang Bin put the gimbal observation camera into the shooting port in the middle of the door and checked the situation inside, Liu Yucheng pulled out the dragon's teeth, silently popped out the blade, and stood in front of the door, at the moment when Zhang Bin reported the position of the first lock pin, he took a deep breath and poked out his hand like lightning.

Burst!

With a small sound, the blade stabbed into the metal door without hindrance.

Really......

Although Xue Lang knew that the dragon's teeth were extremely sharp, he was still shocked.

The eagle's eyes widened even more.

Even if the metal door in front of you is blown up, it is not easy to use a small-powered bomb, but it is easy to pierce it with a cold weapon, what kind of means is this!

Liu Yucheng did not stop moving, and with four consecutive blows, he stabbed the blade of about two feet into the four positions of the door one after another, and then the door loosened.

Zhang Bin pulled the firing port hard, and the heavy door opened silently.

The moment the door opened, Xue Lang and Zuo Boyang flashed in and flew over, ignoring the fallen figures behind the door.

Liu defeated the city and they followed into the metal gate, quickly diverted, and in the spacious stone chambers on the left and right, silently killed the defenders who ran out in panic and fell to the ground, leaving no one behind.

Just as Xue Lang judged, this is the defense of the sinkhole, and those firing ports surround the sinkhole for nearly half of the way, so to speak, completely covering the sinkhole, and there are no dead ends.

If someone is detected infiltrating, the heavy machine gun will crush all the attackers.

But this time, no enemy situation was found, they were all bored sleeping, or leisurely playing crooked poker, and did not enter a state of alert.

Although the equipment here is not advanced, it is delusional to come down silently from the top of the sinkhole. In addition, even if you come down, it is impossible to break through the gate.

Because the bottom of the sinkhole is flat and unsheltered, once a powerful explosive is used, the shock wave will first tear themselves apart.

So, they're laid-back.

However, how could they have expected that Xue Lang could paralyze the defense, not equipment, but people.

Xue Lang and Zuo Boyang flew all the way, saw a few guys who fell on the road, cut off their cervical vertebrae without hesitation, went all the way up the steps, and stopped when they reached a metal portal.

Then, Liu Yucheng cut off the door pin of the metal door again, and seven people, murderous, moved forward quickly.

By this point, they had relaxed a lot.

On the ground, the guy lying on the ground showed that Ylang Xiang had already played a role here, and they just had to search all the territory to make sure that nothing was missed, and they could control the base.

Here, Xue Lang and the others only searched slightly, and then went straight to the upper floor.

Running quickly down the steps carved out of the stone, they passed another portal and entered an area full of passages.

Xue Lang ordered the headset to be turned on, and then split up, just like the previous reconnaissance, divided into three groups, and ran in all directions.

They had to move quickly, because there were too many people in the base, and the effect of ylang-ylang was only two hours, that is, four hours, which was not a long time.

Xue Lang judged that he went straight in one direction, and he didn't open the doors along the way, because those were at most places to rest, or places to store, and there was not even glass, and they were relatively closed.

He had to find the general control room and make sure that the base was under full control.

Soon, dozens of seconds later, he passed through the narrow passage, swept over the lying figures on the ground, entered a huge space with a glass curtain wall, and found a large number of places with bright screens, that is, the general control room, or the headquarters location.

Sure enough, this is the general control room, and dozens of people are responsible for the screens everywhere. But except for the constant flashing of the police lights in front of them, they are all lying on their stomachs and sleeping soundly.

Xue Lang quickly searched for information on the layout of the entire base, while Zuo Boyang began to search the surroundings to see if there would be any guys who were not completely controlled.

Xue Lang saw it quickly, and also found the location of the missiles hiding here from the surveillance.

Oh yes!

Looking at the missiles erected in the silos, and looking at the anti-aircraft missiles on the trucks with large loads, Xue Lang cursed secretly.

It's about treating other people's countries as your own home!

Seeing the anti-aircraft missiles on the vehicle, Xue Lang's eyes were blank and he quickly searched for them.

Since there are anti-aircraft missiles, a permanent radar is a must.

In the mountains, mobile radars are certainly not very convenient, they should have two radar systems with fixed launch positions.

And the fixed radar must be outside the mountain, not those satellite dishes in the sinkhole.

Sure enough, he found the extremely secret radar position, which was on the top of the hill next to the sinkhole, that is, behind those defensive bunkers. And those bunkers are not completely used to defend the sinkholes from being approached, but to protect the radar positions.