A few hours later, starting with that hospital, zombies began to radiate across the city. A week later, the city was full of life and became a dead city. ”

Smail spread his hands: "That's all there is to it when the zombies break out." There is no doubt that there must have been an accident in that lab while working on a virus. The virus in the lab is the culprit for the emergence of such things as zombies. And the one who survived, at the time of the explosion, was already infected. ”

Yang Hao thought for a while, raised his head and said, "When we came here, we passed through a section of underground drainage system and found a very incredible phenomenon......

Immediately, Yang Hao told Smaer and Zhao Jie about the anomalies and conjectures he had discovered.

Smaël nodded, took a tablet from the side, turned it on, and a flat map appeared on the screen.

"Until now, we haven't fully understood the current situation of the entire city, and some places are too far away to keep up with weapons, ammunition, medical supplies, etc., so we haven't explored those places. And some areas are the dead realms, at least the people I have seen, entering these places, not a single one comes out. ”

Smail was on the screen, and there were several areas on the map marked in red.

"These are the places." Smail pointed over one by one: "This is the railway station, here is a vegetable market, here is a factory, here is the park ......"

Zuihou, Smail pointed to a red area: "Here, it's a sewage treatment plant. ”

Yang Hao's eyes narrowed.

"I looked at it from afar and saw that there was something in it that was beyond my knowledge. And the most incredible thing is that it has something to do with your previous question. ”

Smal put down the map and put his hands on the table: "I was on the roof of a skyscraper and observed this sewage treatment plant for two days. During these two days, zombies will enter this sewage treatment plant from time to time. And after they went in, they never came out! ”

"Moreover, these zombies all have one characteristic: the skin and flesh of the whole body are heavily rotten. To put it simply, they look exactly like the zombie we caught earlier and died of natural causes before death! ”

Yang Hao and the Night Meteor both looked at him in surprise.

"...... so"

Smaer nodded: "I think so too. When those zombies were dying, they were all conscious and ran to the sewage treatment plant. Apparently they all died there. But there is a contradiction here: no matter how you count the zombies in this city, the number is more than a few million, and in serious cases, it may be tens of millions. In five years' time, the number of zombies who will die naturally will definitely not be small, at least it is absolutely fine to completely fill that sewage treatment plant. But when I looked from the outside, there was nothing unusual about the sewage treatment plant, there was no trace of zombie corpses, no roars, and even very little blood. ”

"Where are the corpses? I've never been able to solve this problem. I used to want to go there, but before that, the survivors from other gatherings had gone in and checked. But within five minutes, after a burst of gunshots, there was no movement at the sewage treatment plant, and the men never came out again. This discouraged me from going in and seeing, it was too dangerous, no, it should be said that it was the gate of hell, and if you walked in, you should not think about coming out again. ”

"As for the waterworks you mentioned, I've been there, and there's nothing. But the water supply there has broken down, and the city's tap water supply system is no longer usable, and if we hadn't built a water collector, I'm afraid we would have faced the problem of water scarcity. ”

Smal paused and said slowly, "Didn't you find out?" Since stepping into the city, all communication tools have lost their use? ”

"You know Weishenme?" Yang Hao hurriedly asked.

"I can tell you, but don't try to unlock the secret." Smal reminded him before saying, "Because in the whole city, soon after the zombies appeared, a very strange radio wave appeared. This radio wave is very strange, it spreads in the form of radiation, and any communication tool can receive it, but it will also interfere with other bands, even ultrasound and infrasound waves, when they encounter this band, they will be assimilated by it. ”

Smaer took out another radio and turned on the switch.

The radio immediately remembered a cacophony of sounds, irregular. After listening to it a lot, a few people couldn't help but feel irritated in their hearts.

Smail tried to adjust the band of the radio, but the harsh voice never changed, and the irritability in Yang Hao and the night meteor became stronger and stronger.

"Smack!"

Smaer turned off the radio, and the irritability in Yang Hao and the night meteor immediately disappeared.

"This ......"

Yang Hao also noticed his abnormality and pointed to the radio in surprise.

"Feel it, right? After listening to this band for a long time, people will gradually develop an extremely strong desire to attack. I used to shiyan and listen to this band of sound constantly, and after twelve minutes, I started to lose my mind and attack anything around me. The others lasted for a long and short time, the longest lasted twenty-six minutes, and the shortest lost their minds at four minutes and twenty-two seconds. However, as long as the sound is turned off and the band is not listened to, the person will immediately regain his senses. ”

"But there's one thing that's not disturbed by it, and that's the short-range walkie-talkie. It is a short-distance direct call, during which it will not conflict with any other communication tools and bands, but the range of use of the walkie-talkie has also been reduced a lot, the walkie-talkie we use can be five kilometers away to talk, but now, the call range is only fifty meters. ”

Yang Hao linked what he learned earlier with this news.

"Could it be that the zombies are also able to hear this band, and the desire to attack becomes so strong?"

Zhao Jie on the side shook his head: "It shouldn't be." If zombies can hear this band, then they can hear more than we think. As long as we move and step on the ground, even if your movements are very light and light, the zombies will hear it, which is completely contradictory to the performance of the zombies. ”

Smaer continued: "But it is not an absolute contradiction, because I have collected information for a long time according to this band, and I have discovered a peculiarity. ”

"The source of this band is in that sewage treatment plant."

Saying this, Yang Hao and the night meteor immediately guessed something.

"Do you doubt that it is this wave that attracts those zombies?" Night Meteor asked.

Smal nodded: "Very likely. The longer they become zombies, the more they will weaken their intelligence until they disappear. Shili, too, will gradually weaken. The weakening of shili will cause the zombie's hearing to become more and more developed. I think that when their bodies are about to collapse, their hearing may evolve explosively, and it is not impossible to be able to hear this band. Of all my guesses now, there is only this one that best matches the performance of real zombies. Because the zombies who went to the sewage treatment plant were all in a near-death state, they probably followed this wave to the sewage treatment plant, and what happened inside after that, I don't know. ”

Yang Hao digested the information obtained, and then asked the question he needed to answer the most: "Do you know the way to leave this city?" ”

Smail was surprised: "You want to leave? ”

"Yes, I have to leave, there are still many things to do outside, and I can't stay in this city forever." Yang Hao replied.

Smal thought for a moment, stood up and said, "There are ways to do it, but it is difficult to do. ”

"No matter how hard it is, I have to give it a try." Yang Hao said affirmatively.

“…… Well, since you insist. Wait a minute, I'll find out. ”

Smal turned and walked over to a cupboard, rummaging through it.

"I've got all my information here...... Got it. ”

Smaer took out a booklet and flipped through it.

"This is my old diary, which records everything I observed for part of the time." Smal explained as he flipped through it.

After a few minutes, Smail closed his journal, turned around and said, "There are two ways, but both of them require finding transportation: first, I once saw someone break into the train station, board a locomotive from the zombie horde, and use it to leave the city. The second one is that you need to go to the airport. There are still a lot of planes parked there, but in five years, I don't know if they will work, what parts need to be repaired, whether there will be enough fuel, I don't know. If you want to drive through the checkpoint, I'm afraid it's an act of looking for death, because if you run halfway, you will be blocked by hordes of zombies, and the final result will be to drown in the zombie horde. ”

Yang Hao frowned. He picked up the map and looked at it, and the sadness on his face became even more obvious.

The train station, which is clearly indicated on the map, is an extremely dangerous area, with no entry or exit. And if you go to the airport, as Smail said, there are planes there, but they have been abandoned for five years, and most of the parts have long since rusted. Even if there are spare parts, I don't really know how many can be used.

The most critical thing is that on the way to the airfield, there are markings of danger zones on several routes. Yang Hao counted, there are a total of three routes that can reach the airport, and each of them is not easy to walk.