Open the door of the fire passage, and Chen Bo and others were found by the corpses outside just as they appeared.

The dark corpses seemed to be pushed this way by an invisible hand. The corpses mountain in the middle of the hall fell down, and the wriggling corpses on the top merged into the sea of corpses below. They all rushed towards the fire passage like a tide.

Chen Bo roars and throws two grenades at the bodies rushing towards him. The explosion sounded, and the place where the grenade landed suddenly blew out of a place, but it was then filled by the zombies coming from behind.

The grenades thrown into the corpses are like small stones thrown into the pond. They have no other function except the flash of fire. More than a thousand zombies are gathered in the hall on the first floor, and their actions can no longer be stopped by a few hand grenades.

The bullets kept pouring towards the front. At the front of the corpses, the zombies fell down like wheat, and more zombies poured up behind them, stepping on their bodies and pounced on the fire passage.

"Kill," Chen Bo's hand with his gun was bruised

One grenade was thrown out, and then a series of explosions came from the corpses. The explosion effect of more than a dozen hand grenades together is much better than that of one or two alone. The momentum of the corpses has slowed down significantly in the explosion just now. Many zombies have been washed to the ground by the air waves, and more zombies are in the explosion and have incomplete limbs.

Even if the fallen zombies did not die, they also indirectly hindered the footsteps of the zombies that followed. Taking advantage of this opportunity, the soldiers reaped the lives of many zombies, and their feet were covered with shells that had exited from the guns. These shells fell on the ground and made a series of "ding dong" sounds, which were intertwined with the sound of fire spouting at the muzzle of the guns and reverberated constantly in the channel.

With a click, a soldier's gun suddenly misfired.

"Boss, there are no bullets left!" The blood color in the soldier's eyes gradually faded. He looked at Chen Bo and didn't know what to do next.

Chen Bo was stunned for a moment, and finally calmed down from the continuous shooting. Before, they had consumed a lot of ammunition on the escalator. Although they had used it once, there was not much ammunition left. The hand grenades have been used up in that wave of throwing just now. Next, everyone's bullets will be sold out like this soldier.

"Withdraw, let's go back." Chen Bo did not hesitate, and immediately called the soldiers to retreat to the fire exit behind them. The breakthrough they had just made had been declared a failure. From the moment they rushed out to the moment they retreated, they had not even left the area near the entrance of the passage for ten minutes.

"Shit." Chen Bo was very depressed when he could not break through the encirclement and was blocked again. After returning to the fire passage, they continued to run up. The door behind them had been opened by the corpses. Many zombies poured into the passage and chased up the stairs.

In the retreat, one of the soldiers turned around and started shooting at the zombies behind him. Chen Bo looked back when he heard the gunshot behind him, and suddenly felt sad.

"Da Yong!" Chen Bo roared at him, "Let's go."

"Headmaster, you can leave, and I will give up for the brothers," Dayong said without turning back. His gun continued to pour ammunition at the zombies who were chasing him. "Remember to burn incense for my grandfather, and tell him that his grandson has never been counseled today as he was in the Funan battlefield."

"I'll stay too..." Wang Jinxi was about to turn around and stay with him, but he was pulled by Chen Bo and ran upstairs with a gun.

The corpses rushed up the stairs. Dayong's frontal fire could hardly lock the whole corridor. The shell casings flew in front of him. When the last bullet in the gun chamber flew out, the zombies in front of him had already thrown themselves at him.

The screams came from the corridor, and the soldiers had already run up to the second floor. Without stopping, they continued to rush up to the third floor.

"If you all tell him to stay here, Dayong will die in vain," Chen Bo said with red eyes. "Who will burn incense for his grandfather then?"

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The others around him were silent, Wang Jinxi clenched his teeth, and tears had flowed down.

More than a dozen zombies threw themselves at Dayong. In a moment, he was silent. The zombies around him couldn't get in. They had to continue chasing other targets upstairs. However, Dayong's corpses remained there, blocking the tide of corpses behind him for a moment around his zombies until they were pushed to the ground and trampled on by the corpses coming from behind.

"If only there were hand grenades," Chen Bo looked down at the gap between the stair railings. This narrow position in the corridor can maximize the lethality of hand grenades. The zombies below chased up, and the footsteps in the corridor were thundering for a moment.

"Don't look back. Keep running." Chen Bo shouted.

The bodies of those who had been trapped in the corridor before remained on the stairs. A soldier accidentally stepped on the bones in the body wreckage. The sound of "clicking" came from under his feet. His ankle was cut by the sharp edge of the bone fracture.

Feeling the pain at his feet, the soldier looked down and fell on the ground. The companion next to him reached out and pulled him up. During the delay, their speed slowed down and they were left at the back of the team.

The corpses behind them are fast. The fresh smell of blood in the air makes them more restless. The low roar keeps ringing in the corridor, adding a shadow to the hearts of the retreating people.

The soldier whose ankle was injured became the target that the bereaved rushed to. He was thrown on his heel by the nearest zombie, and one foot was torn by it.

The soldier's foot was pulled from the back by the zombie, and his body fell forward, and then the whole man was dragged into the corpses. Just now, he pulled his partner to catch him, but he reached out a little late and missed.

The corpses that rushed up have been in front of them. They are not affected by the light and air in the corridor. Moreover, living people and blood stimulate their nerves just like stimulants, making them explode with terrible power in their bodies.

The soldier dragged into the corpses by the zombies was like a piece of meat thrown into a group of piranhas, and disappeared instantly. His cry seemed to have just come to his throat, and he didn't even have time to send it out of his mouth.

He reached for his partner and was frightened to stay there. At the moment when he was stunned, the darkness also wrapped him in. The last flash of light in front of him seemed to be the flash of fire from the muzzle of the gun, and then the gunshot disappeared in the soldier's ear, and he could not feel the sad cries of other companions.

Seeing that two brothers were missing from the team, Chen Bo felt as if he had been struck by a knife. Although he knew that their team was in danger today, he felt very sad to watch his comrades in arms die beside him, but he was powerless.

From the first eight people who came in, there are still four. Chen Bo doesn't know how long his team can last. In his opinion, maybe the destination is on the seventh floor above, because the escape route below has been cut off, unless they can escape from the sky.

The desire for survival and the soldiers' dedication to completing the task urge these people to continue to run upstairs. At this moment, all people have only one idea in their mind, that is, to rush up, although they do not see a way out of the sky.

In the hall on the first floor, countless zombies crowded at the door of the fire passage, and the passage was also full of zombies. The front of the corpses still kept a fast pursuit speed, and they were biting the retreating team behind, getting closer and closer to them.

The long fighting before has consumed most of the soldiers' physical strength. Now the retreat route is from the first floor to the seventh floor. Running from the bottom up takes much more effort than moving on the flat ground. In addition, the foul air and dim light in the corridor are also unfavorable factors that restrict their actions. These corpses that are closely followed behind make people nearly run away.

The corridor on the seventh floor is very close. Chen Bo heard the footsteps behind him. The sound came to his ears clearly. He did not have to look back to know that the zombies were very close to them.

Chen Bo knocked open the door of the corridor with a bang, and several people rushed out of it. Chen Bo continued to run to the front. After two steps, he suddenly found that there was only one person's footsteps nearby.

When he looked back, Chen Bo realized that only Wang Jinxi was left with him, and the other two soldiers stopped at the door.

The two soldiers threw their guns at Chen Bo and Wang Jinxi, and together they closed the door. They put their backs against the door and blocked the zombies behind the door.

The zombies in the corridor hit the gate crazily, and the other side of the gate was held by two soldiers to prevent the door from being rushed open by the zombies.

"Foreman, Xiaoxizi, I don't have to worry about anything, just to help you delay the time," said the soldier blocking the door. "If you can run out, remember to give me one when you burn incense in the future, so that I can laugh."

Then he and another soldier beside him looked at each other and smiled. Both of them had gritted their teeth and pushed their breast against the door.

Chen Bo's teeth clenched together and his gums were bleeding. These two soldiers were not the old people in his class at the beginning, but today they showed their blood and will to sacrifice their lives completely worthy of their military status.

Chen Bo and Wang Jinxi catch the guns they threw, continue to run forward, and keep searching for places to hide along the road.

After a while, the gate behind him was knocked open. Only a loud bang was heard, and the two soldiers who blocked the door were knocked out.

The two fell to the ground, and before they could get up, the next moment the zombies swarmed out of the corridor and drowned them in the crowd. The screams and curses spread out from inside, and the blood splashed for a while, which made people can't bear to look at it directly.

"It's over... Headmaster, there are also zombies in front..." Wang Jinxi suddenly stopped running.