Qu Heng and Xue Kaimo walked out of the hall, the doubts and worries they had when they came were gone, and the two of them quickened their pace and ran downstairs. At the exit of the stairwell on the fourth floor, Xue Kaimo suddenly grabbed Qu Heng, who was running down with his head down.

"Listen. Xue Kaimo lowered his voice and said to Qu Heng.

The sound of the surging wind was sounding in the administrative building, which was still extremely quiet at the time of coming, and the wind seemed to be surrounded by something from all sides, and it was rushing left and right in a small space. Finally, Xue Kaimo and Qu Heng realized at the same time that it was not the sound of wind at all, but the sound of hundreds or even thousands of people breathing at the same time. Qu Heng looked downstairs and found that except for the section of stairs leading from the third floor to the fourth floor, the bottom was already crowded with zombies (the staircase of the administrative building was a circular staircase, so Qu Heng's vision was almost unobstructed). The zombies were different from what he had seen before, their ranks seemed more orderly, their posture and momentum were more erect and strong, and although their faces all showed a ferocious expression of impatience, there seemed to be an invisible cordon in front of them, restricting their movements. Or rather, they are more like a group of warriors waiting for an attack order than a pack of hungry beasts. Qu Heng retracted his head and found with a pale face that Xue Kaimo was standing at the exit of the stairwell, and Xue Kaimo also seemed to be shocked by something, frozen in place like a wood carving clay sculpture, unable to move. Qu Heng walked to Xue Kaimo's side and looked at both sides of the corridor outside the stairwell exit. On both sides of the corridor were also a team of zombies with no end in sight, and the nearest row of zombies was even five or six meters away from them, they could even see the black teeth that were flowing blood and unknown substances at all times, and the doors of all the rooms in the corridor were open, and no one could say how many impatient zombies were crowded in those rooms.

Xue Kaimo and Qu Heng hurriedly glanced at each other, and then the two of them quickly turned around and rushed upstairs as fast as they could. At the same time, a sharp and piercing roar came from a certain floor downstairs, and all the zombies seemed to have finally heard the long-awaited battle cry, and roared up the staircase where the blood-colored footprints of Xue Kaimo and Qu Heng were kept.

Xue Kaimo and Qu Heng ran back to the hall and immediately pushed the two heavy iron doors. Fortunately, the door lock was not broken, and the two people locked the iron door with sweat profusely, and pushed a few operating tables against the door. As soon as he had done all this, there was an earth-shattering bang outside the iron door, like hundreds of fists with all their strength smashing on the door panel at the same time. Then there were the angry and brutal roars that the two of them were all too familiar with, only this time, the emotions of those zombies seemed to reach their full point quickly, and there was even some desperate hysteria. Xue Kaimo began to imagine that the zombies rushing to the front were slamming their heads madly against the iron gate, the already corrupt and fragile skulls scattered and splashed with colorful viscous liquid, and the same kind behind them also rushed forward like a demon, until their corpses were crushed and torn apart on the iron door.

"Are they crazy?" Qu Heng looked at Xue Kaimo nervously.

"They've gone crazy for a long time. Until this time, Xue Kaimo did not forget to correct Qu Heng's logical mistakes. "Now they've only evolved once, they can stand in a neat queue, they know how to follow unified orders, and their gathering place may have changed from the underground blood bank here. Or..."

"Not replacement, but expansion?" Qu Heng continued.

Xue Kaimo nodded. Suddenly, a terrible thought flashed through his mind.

"Have they been waiting here all along?" Xue Kaimo asked to himself.

"You mean..."Qu Heng couldn't feel his breath when he spoke.

"Yes, they've been waiting here all along, and the zombie we saw on the third floor was also deliberately designed to make us let our guard down. Xue Kaimo said.

"It's terrifying, has their thinking really evolved to this extent?" Qu Heng felt such a deep fear creeping through his body for the first time, if he could comfort himself that they were only dealing with a bunch of simple-minded beasts with developed limbs, then the facts now proved how ridiculous his excuse was then.

"No, it's not the scariest thing. The most terrifying thing is him..."Xue Kaimo pointed to He Xun's corpse on the right side of the hall.

Qu Heng looked at Xue Kaimo blankly, waiting for him to explain, and Qu Heng seemed to have lost the ability to think at this time.

"He must have been tied here by Dean Su, and the key around his neck must have been intentionally left by Dean Su, and Dean Su seems to have concluded that we will definitely come here to pick up the key. And by the time we walked into the administration building, the zombies had probably spotted us, but they hid silently and let us go upstairs. Xue Kaimo stopped here because he knew that Qu Heng must have understood what he meant.

"You're saying that this is indeed a trap, and it was Dean Su and the zombies who jointly designed this trap. So what is the purpose of their doing this, it is not a contradiction to give us a clue and kill us. Qu Heng began to be confused again.

Xue Kaimo shook his head, "I can't think about this question clearly. But we still quickly found a way to get out and go back to Building 2 to terminate the operation. These zombies have become so powerful that our people are definitely no match for them. ”

At this time, there was a sound of glass breaking from the window of the hall, Xue Kaimo and Qu Heng followed the prestige, and found that there were several arms with fleshy skin hanging on the windowsill through the broken window, and then the faces of several hideous zombies slowly rose. The zombies seemed to lose their pain, allowing shards of glass to penetrate their already wounded and rotting skin, their mouths screaming hoarsely in a language that only they could understand, like a bunch of demons who had just escaped hell.

Xue Kaimo and Qu Heng immediately rushed forward and knocked out a few zombies that had already leaned out of half of their bodies. They didn't dare to put their heads out of the window to look out, only to look at the arms that kept climbing up, and then deliver a fatal blow to their wrists.

Qu Heng and Xue Kaimo ran frantically in front of a few windows, but more and more zombies climbed up from downstairs, and several times they were almost jumped in by several zombies.

"We're going to be exhausted if we go on like this. Qu Heng cut off half of a zombie's body with a knife, and turned around and shouted at Xue Kaimo.

"Hold on a little longer, and there will definitely be a way out. Xue Kaimo responded in a hurry, but in his heart he was ready to die here.

Suddenly, a zombie crawled in through a window on the left side of Xue Kaimo. Xue Kaimo stepped forward in one step, and the iron pipe in his hand accurately smashed on the neck bone of the zombie, and the zombie fell backwards without a sound, while Xue Kaimo's eyes were firmly fixed on the place that was blocked by the zombie just now.

"Qu Heng, come here. Xue Kaimo hurriedly shouted.

Qu Heng cut off a few more arms, hesitated for a moment and ran in the direction of Xue Kaimo.

"What?" Qu Heng tried his best to calm his breathing, wiping the sweat from his eyes with his hands.

"Elevator. Xue Kaimo pointed to the left front of the two people with the iron pipe in his hand.

There is a silver-white sightseeing elevator in the middle of the wall on the left side of the hall, and a corner of Building No. 2 can be seen through the glass cover of the elevator, and the attention of the two people was attracted by He Xun on the other side of the hall, and they didn't even glance at the left side of the hall from beginning to end.

"Quick!" Qu Heng patted Xue Kaimo's shoulder, and the two of them ran towards the elevator almost at the same time.

At this time, more than a dozen zombies had already climbed over the windowsill, entered the hall, and pounced straight at Xue Kaimo and Qu Heng.

Xue Kaimo and Qu Heng ran to the elevator, Xue Kaimo looked at the zombies that were getting closer and closer behind him, and stretched out his hand to press the digital buttons on the electronic board. But when the elevator door opened quickly, Xue Kaimo and Qu Heng stood here dumbfounded, and no one took a step forward.