"This damn place looks really creepy."

Looking at the street illuminated by the sun, Fang Zheng shook his head and muttered to himself.

Just as Kei said, after the sun rose, the zombies that were roaming around disappeared. The streets were completely empty, not even an animal could be seen. To be honest, this scene was not very pleasant.

If this was a long-abandoned city, it might be better. The overgrown streets might look messy, but at least it was a sign that nature was active. But now, the city has long maintained the appearance of a city, but looking around, there is not even a single person to be seen. This feeling even makes people feel that this city is just a set prop, a "scene map" like "The Truman Show". This makes people feel a little uneasy or even fearful, as if they are the only one abandoned here... a prop. After seeing it too much, they may even suspect that the world itself seems to be just a big toy box, and now, the owner of this box seems to have given up on this toy.

Although it seems that Fang Zheng can play Need for Speed ​​as he pleases on this empty street, in fact, the danger here is not low.

It can even be said... very high.

“Whoosh!”

Just as Fang Zheng was walking around the corner, a thin black shadow suddenly jumped up from the eaves next to him, stretched out its arms and pounced towards Fang Zheng. Its speed was very fast, almost the same as that of a cheetah hunting its prey. In the blink of an eye, the black shadow came in front of Fang Zheng - and then was pierced through the body by an arrow. It screamed and flew backwards and nailed to the wall next to it. The black shadow struggled for a few times, then gradually lowered its head and became silent.

"It's Hunter after all."

Fang Zheng walked to the wall, squinted his eyes and stared at the monster in front of him. It also looked like a zombie, but unlike the zombies that moved at night before, this zombie's skin was covered with healed scars. It was a little short, with long arms and very short legs. It looked more like a gibbon.

However, what Fang Zheng cared more about were the scars on its body.

"Sure enough, is this one also an evolved form?"

Fang Zheng took out his personal terminal, scanned the monster in front of him, and then compared the data.

"How's it going, big brother?"

At this time, Xiao Hei also came to Fang Zheng's side, looked at the monster carefully, and looked curiously at Fang Zheng's personal terminal in front of him.

"It seems that my guess is correct. So far, all the mutants we have encountered are the evolution of zombies... Look, this zombie also has signs of skin ulceration due to direct sunlight, but its wounds have healed, which is very telling."

Having said this, Fang Zheng raised his head and looked at the sun in the sky before him that was emitting scorching heat.

He and Xiao Hei had been searching around the station for a whole morning, and during that time, Fang Zheng and Xiao Hei had encountered several powerful mutants. However, unlike what Fang Zheng had guessed, after coming into contact with these mutants, Fang Zheng was surprised to find that these mutants were not social creatures as he had imagined. On the contrary, these mutants all acted alone, and they seemed to have some kind of territorial awareness, and would attack creatures that entered their territory.

Not only that, through the dissection and scanning of these mutants, Fang Zheng also discovered another pattern. That is, these mutants are all "evolved" from ordinary zombies. As for the source of their evolution... Although Fang Zheng really doesn't want to admit it, at present, there is only one answer.

That's the sun.

So far, Fang Zheng has encountered four mutants, all of which showed signs of skin ulceration after being exposed to the sun and then healing. This means that these mutants evolved into their current form after becoming ordinary zombies and then being exposed to the sun and undergoing secondary mutations.

Now Fang Zheng was just not sure whether this evolution was conscious or just accidental. After all, the evolutionary directions of the several mutants he had seen before were all different. And more importantly...

"These are about enough to collect samples."

As he spoke, Fang Zheng reached out, cut off a small sample from the body in front of him, and then placed it in a glass box.

"Let's go back, Xiao Hei."

"Okay, big brother."

Hearing Fang Zheng's words, Xiao Hei threw a piece of chocolate into his mouth and nodded.

When Fang Zheng and Xiao Hei returned to the station, it was completely new. I have to admit that Cui and Citang Gui were very attentive. At least when Fang Zheng walked in, he felt much better when he saw the bright and clean hall and neat furniture.

"You're back, Brother Fangzheng, Sister Xiaohei..."

Seeing Fang Zheng and Xiao Hei coming back, Cui hurried over and looked at them with a smile on her face.

"I'm back, Cui."

Looking at the cat-eared girl in front of him, Fang Zheng smiled and reached out to touch Cui's head, while rubbing her soft cat ears.

"How's the situation? Any response?"

"Xia Shi hasn't responded yet. Miss Gui from the ancestral hall is helping..."

"I see."

Fang Zheng was not surprised to hear this. The city was like hell. Fang Zheng believed that even if he randomly brought a survivor from the biochemical crisis here, it would be a problem whether he could survive a day in this hellhole. Of course, Alice might be an exception... or maybe not, who knows?

"I have some research to do next. You and Xiao Hei should go and have a rest first."

As he spoke, Fang Zheng walked to a closed compartment nearby - this was originally used as a storage room for train maintenance tools, but now Fang Zheng has used it as his own laboratory.

After closing the door, Fang Zheng took out five glass boxes from his pocket and placed them on the table. Then he turned on his personal terminal and began to carefully scan and study the viruses inside.

Fang Zheng is not a biologist. In fact, his understanding of biology was at a very basic level when he was in college. But this does not mean that he has been wasting his time all these years. Especially after mastering the talent of the Time Dragon, Fang Zheng found that many things that seemed like incomprehensible to him before can now be easily understood... Well, thanks to this talent, Fang Zheng tasted the joy of being a top student for the first time in his life.

And now, he can finally put his knowledge into practice.

Among the five samples at present, two were extracted by Fang Zheng from "ordinary zombies", and the remaining three were from three different variants. Now Fang Zheng wanted to see how this world could "justify itself" in a completely mixed "biochemical world"?

However, the test results surprised Fang Zheng.

After comparing the "basic virus" samples collected from ordinary zombies with the "mutated virus" samples collected from mutants, Fang Zheng was surprised to find that the structures of the two had undergone completely different changes, and could even be said to be completely different things!

If the "basic virus" is like a handful of soil, then the "mutated virus" is like taking soil and burning it into bricks, making clay sculptures, or even making ceramics. Although the "raw materials" are the same, the "finished products" themselves are very different.

Not only that, these "mutated viruses" themselves are still not in a complete state. After analysis and research, Fang Zheng discovered that these viruses are still undergoing further "evolution and upgrading", but the evolutionary process was interrupted after their hosts were killed.

And in the end, Fang Zheng finally figured out what the virus in this biochemical world was.

According to current observations, the initial "basic virus" will spread through water, air and blood, infecting other people. At the same time, it will quickly mutate and erode the host's body. The human immune system will react violently to this, and the two sides will begin to fight. At the beginning, the immune system may have the upper hand, but eventually the "basic virus" will destroy the immune system, kill the host, and transform it into a zombie.

At this stage, zombies will be full of strong desire to eat due to the virus activity, and will attack other living life forms. At the same time, they will also be afraid of sunlight and try to hide.

But if the zombies are unfortunately exposed to sunlight, the "basic virus" in their bodies will begin to undergo a crazy secondary mutation to resist the damage caused by sunlight. From the current point of view, their mutation itself seems to be random. Take the several mutants that Fang Zheng encountered before, although they all have the ability to resist sunlight, their movements, hunting methods and body sizes are very different.

Not only that, Fang Zheng also discovered that during the secondary mutation process, the evolution of these viruses had no pattern to be found and was completely random.

This is like the calculation result is 9. No matter whether you choose 4+5, 1+8 or 3X3, as long as you can get the result "9", there is no uniformity in the intermediate process!

From a certain perspective, this virus is similar to the Zerg, but the difference is that the evolution of the Zerg is through "taking the best of all schools" and integrating them into one. The evolution of this virus is more like "rolling the dice a hundred times, as long as one time it is double six, then I win"...

From a certain perspective, this virus is more troublesome than the T virus...