Infrared detectors work by detecting infrared rays emitted by the human body. The detector collects infrared radiation from the outside and then collects it on the infrared sensor. Infrared sensors usually use pyroelectric elements. This element will release charges outward when the temperature of infrared radiation is changed. After detection and processing, it will generate an alarm, that is, as long as it is not detected by infrared rays, it will be fine.

Infrared rays are invisible under the night and are difficult to distinguish with the naked eye. Ordinary people will definitely be discovered when they enter rashly, but they don’t know if they are exposed. Fortunately, Luo Zheng and others are wearing special tactical sunglasses. The sunglasses have infrared recognition functions and can see infrared rays in the night, otherwise they will hit them head-on.

The infrared rays are about one foot high on the ground, and bunches of infrared rays cross, but they are all fixed. Luo Zheng carefully crossed the infrared rays, not daring to be careless at all. Once the alarm is triggered, all previous efforts will be wasted, and there may be endless pursuit.

Fortunately, the infrared rays were not distributed much, only about ten meters. Luo Zheng quickly concealed the area after crossing the country's infrared detection area, and observed the surroundings calmly, his eyes flashing like cold stars. With the help of tactical sunglasses, the situation about 30 meters ahead was clear at a glance. Perhaps because of the infrared detector, the defense in this area was relatively relaxed and no abnormalities were found.

"Come here slowly, be careful, never touch infrared rays." Luo Zheng whispered through the headset, and slowly pushed forward. If there was a secret whistle ahead, he would find out as soon as possible.

After walking about a hundred meters, Lan Xue's voice sounded from the headset: "Brothers have all come here, where are you? What's going on?"

The sky was too dark and the visibility was weak. The tactical sunglasses could only see more than 30 meters in range. Luo Zheng had already penetrated a hundred meters forward, and Lan Xue and others could not see it. He was anxious. Luo Zheng was hidden on the spot and observed the front calmly, while saying, "Push forward, I am within a range of hundred meters."

Luo Zheng was exploring the way ahead, and everyone walked very quickly. After a while, they came to Luo Zheng and looked ahead like cheetahs, keeping a blind spot on the spot, with cold eyes and murderous intent. The arms holding the steel gun tightly had a little more force.

"The manor is about 500 meters away. There may be a hidden whistle in front of you. Be careful. Xueer and I will explore the way, Ghost Hand, take your people to the left, Snow Leopard, your people to the right, and advance in a column, and walk in a straight line. Everyone stays more than five meters and wait for my order to move." Luo Zheng reminded seriously.

"I understand." Everyone replied in a low voice.

Luo Zheng and Lan Xue exchanged glances and nodded tacitly. Luo Zheng held the pistol and touched them carefully. The speed was not fast. He walked more than ten meters and stopped to observe them, and then gestured to Lan Xue. Lan Xue followed, pushed forward and about ten meters to lurk about ten meters. After confirming that there was no danger, he gestured to Luo Zheng.

The two of them covered each other and pushed forward for about a hundred meters alternately. Luo Zheng lurked in a bush and observed the front calmly, feeling faintly uneasy. This feeling was very bad. He couldn't help but be shocked and looked ahead vigilantly, but no abnormality was found. He felt a little frightened and quickly lowered his voice through the headset and said, "There may be danger ahead, don't move, wait for my order."

"I understand." Everyone responded in a low voice.

Feeling the danger but not knowing where the danger is. This feeling is very bad. Luo Zheng looked ahead vigilantly, not letting go of any details, but his visibility is limited and he can't see too far. Waiting on, it will only waste time. Luo Zheng made a fuss and gestured to Lan Xue lurking beside him. Lan Xue nodded knowingly, aimed at the front of the gun, providing fire cover for Luo Zheng. Luo Zheng bent his waist and rushed forward.

With Luo Zheng's explosive power, it is not a problem to rush ten meters in one second. Under the cover of night, this speed is difficult to distinguish with the naked eye. Luo Zheng used the surrounding terrain to lower his body as much as possible. The ghost penetrated forward like a ghost, and in a blink of an eye, he rushed into about twenty meters and observed the surroundings vigilantly.

After a while, Luo Zheng found a sunken ditch in front of him. The ditch was covered with weeds, which was the only place in front of him where people could hide. He couldn't help but pay attention. The depth of the ditch was difficult to distinguish with the naked eye, but it was only one meter wide and two meters long. It was a natural gully. Luo Zheng became surprised and suspicious. If the hiding people inside, he could not see through it at all. He would definitely be discovered rashly, but he could not stagnate. What should he do?

"What's the situation?" Lan Xue's faint voice sounded in her headset, but it was clearly visible under the quiet night.

Luo Zheng did not answer immediately, but stared at the ravines ahead with vigilance, thinking that if someone did not look out, he would not see himself. Assuming he rushed over like this, once someone looked out to observe the ravines, he would definitely have time to kill the other party, so he didn't have to worry. But for the sake of safety, it would be better to let Lan Xue come over to suppress the formation. Thinking of this, Luo Zheng was about to call, and suddenly he saw the bushes not far from the ravines that seemed to move. He was shocked and looked at them carefully.

The bushes were shaking under the wind, and Luo Zheng observed the bushes in surprise. The intuition just now told Luo Zheng that the bushes there were not blown by the wind, but moved them all. After observation, Luo Zheng smiled. The bushes were just artificial disguise, but they were indeed clever. If they hadn't happened to see them just now, they would definitely not be able to find them. The other party was a master, and it would be fine if they hadn't lurked in the gully, but they were actually lurking beside the gully. Luo Zheng's firm face had a cold murderous aura.

Normally, gullies are the best place to lurk and are easy to attract attention. Luo Zheng regards gullies as lurking locations. Unexpectedly, the other party lurks next to the gullies, using gullies as cover, and with exquisite disguise, most people will definitely not see through it. They just hit the gun when they come up.

This brilliant lurking made Luo Zheng's blood surge up, as if he had met a confidant. Unfortunately, it was the enemy, so he could only clear it. Luo Zheng did not take action immediately, but instead looked around vigilantly, not letting go of any details. With the experience of this secret whistle, Luo Zheng observed more carefully. After a while, Lan Xue's questioning sounded in his headset. Luo Zheng's eyes sterned, locking the lurking target again, aiming at the gun at the gun.

"Puff puff puff!" Three bullets roared out of the chamber without any warning. Although the sound was filtered by the muffler, there was still a slight sound, which was particularly clear in this quiet wilderness. Fortunately, it was not too far away, and the endless murderous aura suddenly exploded, as if it was about to tear the entire night sky to pieces.

Three bullets shot quietly in the shape of a font, like three deadly ghosts, and instantly penetrated into the bushes. Luo Zheng keenly felt the bushes move, but soon there was no sound. Luo Zheng was worried and shot three more shots at the bushes. The bushes were still not moving, so he breathed a sigh of relief.

"What happened?" Lan Xue's voice asked anxiously in the headset.r1148

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