Chen Xin was thrown on the wall by Xie Guoping, and many places on his body were in pain, but he didn't dare to move, because the other gunshots on the wall kept ringing non-stop.

The firepower was very dense, and in just a few seconds, it was much more than all the gunshots Chen Xin had heard in his life.

"The two evolved zombies should be dead, and there is not even a trace of fighting." Chen Xin thought to himself.

Then there was a sound of footsteps, unlike Chen Xin and Xie Guoping, who couldn't wait to even breathe cautiously, the other side of the wall was full of flamboyance, and the pace was dense and hard, Chen Xin could easily imagine the hard leather boots that made these sounds.

It wasn't until the sound was completely gone that Xie Guoping dragged Chen Xin out from behind the iron door.

Chen Xin took advantage of the emergency light in the distance to look around, and the two evolved zombies fell not far from the position that Chen Xin had observed, that is to say, the zombies had almost just discovered each other, and they had already been shot by the fire in an instant.

Xie Guoping still took the trouble to check the corpses of the two evolved zombies in turn, "The other party's firepower is very strong!" And it's rigorously trained. ”

"The firepower is strong, I heard it just now, but what's the matter with strict training?" Chen Xin doesn't care that Xie Guoping regards himself as a budding newcomer, he always feels that he can learn a lot from Xie Guoping, just like when he first arrived at his mentor's biology laboratory, he just asked cheekily.

Xie Guoping was not impatient either, and explained in a low voice, "There are almost no bullet holes in the surrounding buildings, and all the firepower is concentrated on the two zombies. Among them, the number of bullet holes in the head, neck, and heart is about the same. So, it's a combat squad with professional military training. ”

"Hey, shouldn't they all hit the same place to show that they have excellent marksmanship and have been trained for a long time?"

"Not really," Xie explained patiently. "A professional combat squad, each combat post has its own attack target, and everyone attacks the same opponent or the same place, which will only cause repeated superposition of firepower and waste."

Chen Xin looked at the zombie corpses on the ground, and with a physical reference, he quickly understood what was going on, and nodded clearly.

"Let's go, follow them. They went to the second basement floor. Xie Guoping stood up straight and said to Chen Xin.

Chen Xin followed Xie Guoping to the stairwell in front, and he suddenly found that the dagger that he had never known where Xie Guoping was hiding before, had been pinched in Xie Guoping's hand at this moment.

And Xie Guoping was no longer hiding behind Chen Xin or in the darkness on the side, but walked in front quickly.

Looking at the corpses of the two evolved zombies on the ground, Chen Xin suddenly thought of something, chased to Xie Guoping's side and asked in a low voice, "Team Xie, have you found that there are not a single ordinary zombies underground?!" Not even a corpse? ”

"Well, I found it." Xie Guoping nodded indifferently and did not stop.

Hearing Xie Guoping's answer, Chen Xin's originally prepared remarks seemed to be unable to continue, he knew that he had asked a stupid question, and even he could find out about the situation, Xie Guoping, as a veteran who carefully checked every detail everywhere he went, could not have found out.

"Turn off the flashlight, change the pistol to the rifle, follow my footsteps closely, and don't deviate more than half a meter from my direction!" Xie Guoping, who was walking in front, said again, Chen Xin knew that there must be a reason for him to say this, and felt that the atmosphere was gradually becoming tense, Chen Xin didn't dare to ask why, so he inserted the pistol into the tactical vest according to what Xie Guoping said, and pulled out a 95 rifle from behind and held it on his chest.

The very well-trained combat squad advanced extremely fast underground, and Chen Xin and Xie Guoping walked all the way forward, although they slowed down a lot in order to hide their tracks, but they still never kept up with the combat team. On the road, the two of them could always hear bursts of gunfire in front of them intermittently, and along the direction of the gunshots, they could always see one or two zombie corpses of evolved bodies lying on the side of the road.

After walking for about another five minutes, the two of them heard the gunfire not far in front of them getting closer and closer, which meant that the elite combat team was finally blocked, and there was no way to advance and break through as quickly as they had just now.

The gunfire continued, and it was getting closer, and the two men couldn't help but slow down more cautiously, knowing that they would soon reach the area where the two sides were fighting.

"It's the people of the 'company'!" Under a commercial vehicle, Xie Guoping said to Chen Xin, who was also lying on the side, "They are in trouble!" ”

Chen Xin knew that both the military and the "company" were big forces in the Far East, and even if the two sides did not directly establish diplomatic relations, they must have known about the existence of the other party.

"Is it because of the zombie tide on the other side?" Chen Xin also followed Xie Guoping and observed for a while under the car.

"It's behind the tide of corpses!" Xie Guoping still stared intently at the battle area, "The tide of corpses on the ground, the military department has to repel it almost every day, and it is not terrible. But this tide of corpses ..... Obviously, there is something behind the control, the entire underground zombies have been organized to this place by this thing, and the way the corpse tide attacks the combat team is like a wave, this is the most primitive sea of people tactic! ”

"As long as that combat squad runs out of ammunition, their big trouble will come."

After hearing this, Chen Xin lay motionless on his stomach, and after more than ten minutes like this, the firepower of the combat team still kept shooting tongues of fire at all, and there was no lack of ammunition at all, and finally couldn't help but turn his head sideways and ask Xie Guoping, "How long can they hold on?" ”

"It's coming."

"Running out of ammo?"

"No, it's the zombies that are running out. Each of these people has 4 double-linked magazine packs on their waists, and even if they use some on the road before, this wave of defense can last at least half an hour. ”

"Didn't you just say that when they ran out of ammunition, they would be unlucky?" Chen Xin suddenly felt a little tricked, and raised his voice slightly and said.

Xie Guoping put his finger on his lips, motioned for Chen Xin to lower his voice, still did not turn his head, looked at the two sides of the firefight and said, "The ordinary zombies are gone, and there are also evolved zombies, although there are not many of them, but they are a waste of bullets." ”

Listening to the incessant gunfire outside, Chen Xin was not ready to continue to ask, but he could also roughly understand that the evolved zombies that were faster and more agile would definitely need more bullets to knock down than ordinary zombies that could be shot with three or five shots.

If there were a large number of Evolved Zombies, there was a real chance that this group of warriors would be able to break through the improvised defensive positions they had just built.

As if to confirm Xie Guoping's words, Chen Xin found that in the tide of corpses, a few sporadic evolved zombies began to appear, if it weren't for the group of soldiers who turned on the searchlights in the position to shine on the zombie group, with Chen Xin's eyesight, they might not have been able to find it.

"The existence behind this is a bit tricky, I thought that he would wait until the ordinary zombies were all dead, and he would send stronger combat power to the scene." Xie Guoping touched the fine stubble on his face and said, "Xiao Chen, we may have to help later." ”

"Oh, yes. Is it lying here and shooting black guns? ”

Xie Guoping obviously had some opinions on Chen Xin's description of "black gun", and he had been staring at both sides of the firefight, but at this moment, he turned his head to look at Chen Xin a little speechlessly.

After looking at it for a few seconds, Chen Xindu, who was watching, felt that his face was full of flowers, and heard Xie Guoping say, "No, let's stand on the roof of the car." I'll teach you how to snipe. ”

"These fighters know that with crossfire, there is nothing wrong with killing and injuring ordinary zombies. But if there are enhanced evolved zombies, it is very likely that they can rush up with a group of zombies against fire! So we're going to snipe these evolved zombies on the roof of the car! ”

"Good!" Chen Xin also knew that standing on the roof of the car would definitely be exposed to so many zombies, and he would also be targeted by the existence behind that unknown thing, but he did not retreat, but was a little excited about being able to learn new combat skills from Xie Guoping, after all, this is a legend! And just now, along the way, Chen Xin admired the muscle control skills taught to him by Xie Guoping, if it weren't for the current environment, he would like to have a full range of body detection and motion capture for himself, maybe he can extend a new biological research direction from here.

"Almost, there are already zombies at the feet of these fighters, it's good for us to get on this pickup, let's pay attention to concealment before shooting." Xie Guoping always paid attention to the firefight, although so far, not to mention that some soldiers were killed, not even hanging colors, Chen Xin really couldn't help but sigh, in front of trained soldiers, as long as there is sufficient firepower to cover, ordinary zombies are still very vulnerable.

The sound of the firefight was too loud, and the sound of two people turning into the pickup truck didn't attract the attention of a zombie, Xie Guoping took the 95 rifle on Chen Xinxing's hand, and with his left hand, he grabbed the gun strap that had been broken by his steel cable before, leaned his chin on the cheek board, and said to Chen Xin, "The underground garage is still very friendly to snipers, and you don't need to pay attention to the wind direction and the sun." Outside, these two must be fully considered, and this one will be taught to you later when I have the opportunity. ”

Chen Xin looked at Xie Guoping's eyes on the back of the crosshair, and heard that he began to teach some sniping knowledge again, "The first step, ranging!" In the old days, normal snipers would have an observer configuration, but in the new era, as long as you have a gun with a range of more than 200 meters, you are a sniper, even if you have a 98k from World War II! ”

"Step two, breathe! Keep breathing evenly, if you hold your breath, your heart will beat faster, and your fingers will sometimes tremble, which will affect the accuracy of your shot. Of course, Xiao Chen, if you can fully master the muscle control technique, you can also feel free. ”

"Step 3, aim! If there is an over-the-horizon close-up mirror, that's the best. However, a good sight is even rarer than a gun in your hand! Now let's keep it simple, I'll teach you a simple formula for the secret position, imagine a triangle, and the muzzle height is based on the tan value of the apex angle. ”

Chen Xin listened to it for a long time before he felt that this sniping was really a science, he always thought that he would aim at the doji and fire, but he didn't expect that there was such a set of skills, but fortunately, he was also a high-level intellectual, and advanced mathematics had not been left behind. At this moment, he didn't dare to take a breath, and carefully approached to listen to Xie Guoping, barely understanding the formula he just said.

"One last step! Find the key target and him! Just as Xie Guoping's words fell, a flame had already erupted from the muzzle of the rifle.

Chen Xin looked in the direction that Xie Guoping was aiming at, and an unusually tall zombie suddenly lost a section, and there was nothing left on his neck.

"Good marksmanship, all the heads are gone!" Chen Xin saw it really and couldn't help but sigh.

Xie Guoping didn't answer, but raised his head and looked, "It's not me!" There are masters among the people of the 'company'! I hit the zombie in the head, but at the same time someone broke the zombie's neck! ”

Then, Chen Xin heard a particularly piercing gunshot from the opposite position, every second, and every time this gunshot rang out, there was an evolved zombie in the zombie group on the other side whose neck was broken.

"This is a real master, and there are not many snipers in the military department who can do it at this level."

"Bang bang" Chen Xin saw the corpse tide approaching his side, and there were originally two evolved zombies attracted by Xie Guoping's gunshot, and their necks were also soft to the ground.

"He's spotting us, he's greeting us." Xie Guoping squinted his eyes and said, then lowered his head to look at the crosshairs, aimed at the corpse tide and began to shoot.

In the next 1 minute, Chen Xin felt that he had opened his eyes, the crossfire of the elite fighters before had already made him feel that the marksmanship of this group of people was far better than his own, at least most of the bullets fell on the zombies.

But compared to Xie Guoping and the unknown sniper just now, it was like the difference between Chen Xin and the elite soldiers. After the two found each other, they both gave up each other's frontal zombies, one focused on the front of the corpse tide, and the other focused on the left wing of the corpse tide, but one thing in common was that as long as there was a gunshot, Chen Xin could find that there was an evolved zombie that was incapacitated.

It's just that Xie Guoping and Chen Xin didn't have enough firepower to cover the ordinary zombies, and in less than a minute, many ordinary zombies noticed Chen Xin's presence and slowly moved towards the pickup they were in.

Seeing that the tide of corpses that were about to be separated formed a semi-encirclement, Xie Guoping immediately put away the 95 rifle, pulled Chen Xin, and jumped down to the back of the car, "Let's go, they have masters, they don't need our help, don't trap yourself in." ”

Chen Xin was naturally the only one who looked forward to Xie Guoping, bent on his waist, and no longer deliberately used muscle control methods, and followed Xie Guoping into the darkness with a small brisk.

The zombie horde lost its target, spun around in place a few times, and then slowly moved towards the position of the elite soldiers.

------------

In the center of the elite soldier's position, on a stack of half-man-high flood control sandbags, there was a soldier wrapped in black tactical equipment, half-kneeling and repeating the action of pressing bullets and firing.

"Zhang Baixin, how is the fourth-order buff effect?"

The soldier kneeling on the flood control sandbag heard the question, turned his face, which was covered by night vision equipment, and replied with an urn sound from behind the mask, "I have never felt so good, the endurance has increased by 83%, the speed has increased by 81%, the physical strength has increased by 79%, and the ability to resist blows has not been tested." ”

The moment the masked man turned his head to answer, his hand did not stop, as if he also had eyes on the side, and the head of an evolved zombie flew away in the distance after the gunshot.

"The evolution of ability is also very smooth, the visual and auditory enhancement is obvious, and if the feeling is strengthened a little more, you can form the 'area exploration' ability that you said before Dr. Su."

"Very good, be careful not to smash the head of the evolved zombie, and extract as much spinal fluid as possible, maybe the fifth-order evolution potion will be lost. In addition, if the weight bearing allows, a tissue will be collected for any organ that you feel is abnormal. ”

Although it has been almost a year since the outbreak of the virus, Zhang Baixin, the masked man, still feels that the woman in front of him is not like a woman at all, whether it is the standard of women in the old era or a woman living in the wasteland world. Although, the person in front of him is also the goddess's standard black straight hair, his skin is so white that it glows, and his facial features are even more delicate and small, especially a pair of eyes, slender tails, and hooked at the corners of his eyes, which has a very good taste of Danfeng eyes, but with that expression that has not changed for thousands of years and a white coat that will never change, somehow, it makes Zhang Baixin, who has no calculation for murder, have a very uncomfortable cold feeling.

Of course, he has always been the bodyguard assigned to Dr. Su by the "company", and he also knows how terrible the rumors of this woman in the company are, "cold-blooded" can be said to be the best annotation of more than a hundred brain specimens and thousands of body tissues in her laboratory, every month he only sees a living person being transported into her laboratory, but never sees a living person come out.

Talking to such a cold woman, no matter how beautiful her face is, Zhang Baixin has no desire to talk about something unrelated to work, in case he inadvertently offends this "senior face" who is extremely trusted by the entire company's senior management, it will not be good, he doesn't want to become a living material sent to the laboratory one day.

Seeing that Dr. Su didn't ask any other questions, Zhang Baixin began to aim at the evolved zombies in the corpse tide again, repeating the action of pressing the bullet and firing it.