I handed in the fast pass system

Two years later.

With the joint efforts of countless scientific researchers in all bases, all the written materials obtained from different worlds have been transformed into actual scientific research results, and have been improved to meet the actual situation, and used in daily life battles.

The zombies and mutated animals and plants near the base were all eliminated, and the area of ​​most of the bases was expanded by 2 to 3 times, and the scope of search and rescue was also expanded as a result. They went deep into the area originally occupied by zombie groups, and found more survivors who were still persisting. those.

After all, there is Li Zhi, a special existence who has traveled through many worlds. The Fangtian base has grown from a base at the tail end of a crane that lacks food and has the lowest comprehensive strength to the largest base in country C, with a population of more than 20 and strategic resources. Sufficient, and even spare power, to help other bases.

Rong Guo's research on mutated plants has also yielded results.

Since the trading system only supports text communication, scientists from the two worlds worked hard to communicate through the trading system after a delay of more than 300 times, and finally developed a new variety suitable for use as a raw material for nutrient solution.

The new varieties bred not only have significantly reduced attack power and toxicity, but also have higher yields and more nutrient content, and the extracted nutrient solution can be used in the cultivation warehouse for a longer period of time.

Not only did the base get rid of the dilemma of running out of food at any time, but it even gradually returned to the situation where every family had surplus food before the doomsday.

Originally, because most of the mutated plants had thick and hard skins, there were not many parts that could be used to extract nutrient solution, and the transformation efficiency was very low, but it would be less wasteful than extracting with grain.

The new variety of mutated plants completely erased this shortcoming.

Rongguo is worthy of being a big agricultural country. The new varieties of mutated plants have been bred with thin and fragile shells, which not only facilitates processing, but also greatly increases the proportion of pulp. In the past, plants that could only make one serving of nutrient solution can now make ten servings. The effect is even better than before.

The transformation rate of mutated plants and food has reached an astonishing one-to-one ratio!

On the day when the specific data was calculated, everyone in the laboratory cheered and hugged each other, weeping with joy.

"Great! Now we don't have to worry about the population increasing, and the food in the base is not enough!"

"God bless...God bless!"

"What God? It's Dr. Li who gave us the formula! If you really want to say it, Dr. Li and all the scientists in the scientific research institute protected us!"

Everyone couldn't help but think of everything they had experienced in the past two years.

The backs of the lab from dawn to dusk, the body with distinct ribs under the white coat, the roar of the zombies outside the high wall, the thin but resolute faces of the soldiers... any picture can make the eyes of those who have experienced it wet with tears.

Dr. Li wiped his eyes and said angrily, "Why are you crying? Hurry up and send the things to the factory! This is a happy event, please make me happy!"

Everyone was a little embarrassed when they heard the words, and agreed, and quickly sent the data to the production factory of the nutrient solution.

Everyone was immersed in the joy of successfully developing a new variety of mutated plants, but they didn't know that a major event also happened on the other side of the research institute.

"What?!" Dai Youwei stood up abruptly, "You said Li Bai was a zombie?"

Opposite him is Li Zhi who is now in the limelight and is hailed as the savior of the world by various scientific research institutes.

Everyone looked at Li Zhi in disbelief, and all the experimental work in their hands stopped.

Li Zhi provided them with a miraculous trading system. His contribution to country C and even mankind over the past two years is obvious to all. Everyone regarded him as a savior from the bottom of their hearts. As a result, just now, Li Zhi actually brought Li Bai Come here and confess that the man who has been following him is actually a zombie?

It was still the high-level zombie who was able to drive back level 9 zombies two years ago, with Dai Youwei and others!

What is this concept?

Human beings have not yet encountered level 10 zombies in the classification. Level 9 is already the most terrifying existence. It is only in the past two years that human weapons have been upgraded. When level 9 zombies attacked another base, they were countered by the army at the base. kill.

But that battle still caused great losses to humans. The base was almost destroyed, and it has not fully recovered until now.

And in their base, there is actually an existence that is more terrifying than a level 9 zombie!

What level of zombie is Li Bai?

Level 10?

Seeing Li Zhi nodded slowly, everyone's scalps began to tingle, and they almost wanted to rush out the door, but found that their hands and feet were numb from fright, and they couldn't even move.

In the end, Dai Youwei was the first to react, and said with a serious face: "Do you know what you are talking about? This is... this is a felony!"

At the end, Dai Youwei couldn't help lowering his voice.

In his heart, Li Zhi has always been the young man who rescued them regardless of safety and helped them bring precious research materials to Fangtian base.

If it wasn't for Li Zhi, their materials might not have been brought out at all, or they might have been buried deep underground, and they might not be able to see the light of day until the end of the last few years.

The research progress will be set back by at least half!

However, he was destined to disappoint him, Li Zhi slowly nodded under his disapproving gaze: "I'm sure. Although he doesn't have any wounds on his body, he is indeed a zombie."

As we all know, the most direct way for humans to mutate into zombies is through wounds. When the detection methods of Fangtian Base were the most backward, it was to check whether there were signs of injury on the survivors.

After becoming a zombie, it cannot heal itself, and the wound naturally cannot heal either.

But if there is no wound, how did Li Bai get infected?

Seeing Li Zhi's expression was private, Dai Youwei calmed down a little, "What do you want to say?"

Li Zhi breathed a sigh of relief, it seemed that it was the right decision for him to find Dai Youwei.

He signaled Li Bai to come over with his eyes, but Li Bai didn't go up to him and knelt down directly beside him, waiting for him to touch his head. He walked over with an aggrieved face.

Now without Li Zhi opening his mouth, Dai Youwei noticed something unusual: "His expression?"

The living dead are all mutated from corpses. Even if it is a level 9 zombie, it is inevitable that the body will become stiff, let alone make an expression.

This was also the case with Li Bai before, but Li Zhi said he was autistic, so everyone didn't pay much attention to him, they just remembered that he had been following behind Li in a daze, never speaking.

But now Li Bai, with vivid expression and flexible eyes, seems to be a living person.

Although his behavior looks a bit naive, it just proves that he has thinking.

Dai Youwei suddenly seemed to understand why Li Zhi brought Li Bai here.

Only then did Li Zhi speak, and nodded solemnly: "I picked him up at the very beginning. He looked like a zombie, but he could understand my instructions. During the past two years at the base, his behavior has become more and more like a zombie. A living person, but until this morning, I found out that he can actually make expressions."

If not, Li Zhi might not have told everyone about Li Bai's true identity until he left this world.

Humans and zombies are in an absolute opposite position, even since he met Li Bai, Li Bai has never eaten a human being, human beings hate zombies, it is impossible to tolerate his existence.

But now things seem to be turning around.

"I then checked his body with a tester and found that there was no zombie virus at all."

The tester is also the result of research and development in the past two years in order to more accurately eliminate zombies.

"And his skin color has also changed from the original blue-gray to the skin color of a normal person." Li Zhi wiped off the camouflage on Li Bai's skin. Because of the long-term camouflage, his skin was pale. "I heard that your vaccine research has encountered a little difficulty. I think he may be able to provide some help in this situation."

Of course, the premise is to keep Li Bai alive.

Li Bai's IQ cannot keep up with his physical age, and he is basically an ordinary person in other respects. According to what he has seen and heard in the past two years, scientists in country C should not be so cruel.

Li Zhi was still thinking about what kind of words he would use to convince Dai Youwei, but Dai Youwei was even more excited than he thought. After hearing what he said, almost his whole body threw himself on Li Bai's hand, holding him with one hand. Wearing heavy glasses, I looked at it for a long time, and the first thing I said when I raised my head was: "Can I take a tube of blood for a test?"

really.

Li Zhi couldn't help laughing, patted Li Bai's head beside him, and said, "I'm asking you something."

Li Bai blankly looked at the old man with white beard in front of him, then at Li Zhi beside him, although he couldn't understand what the other party was going to do, but out of trust in Li Zhi, he still nodded.

As a result of the test, Li Bai really turned back into a human.

The zombie virus has caused irreversible damage to his brain, but he seems to have opened up new functional areas in other areas of the brain, and is slowly restoring human instincts.

This result shocked all researchers!

The previous fear of Li Bai also turned into deep surprise.

Vaccine research had made a huge breakthrough with the help of the first self-case, and one day three months later, the vaccine laboratory erupted into screams of joy.

——The vaccine has been successfully developed!

When the laboratory erupted in exclamation, everyone thought it was the experimental body that had mutated and rushed out. The fully armed soldiers rushed into the laboratory with guns. When they saw the situation inside, they couldn't help being stunned.

On the experimental table, the patient who was bitten by the zombies, whose skin had turned into grayish gray, had already returned to the color of a normal person. scratched palm.

The researchers on the side had tears in their eyes, but they still held the experiment record sheet and asked again and again: "How do you feel? Can you talk? How much does one plus one equal?"

The patient looked stunned, but still answered the other party's questions honestly, over and over again.

After a while, he couldn't help it suddenly, and asked, "Did I dream before?"

He clearly remembered that when he was on a mission, he rummaged through the shelves of the supermarket alone, trying to find some daily necessities to hand in, but it turned out that when he fled before, someone broke out in a fight with zombies here, and killed a zombie in the He got under the shelf, and as soon as he moved the shelf away, the zombie rushed out and bit his hand.

Then what happened?

The patient thought about it carefully, it seemed that the army personnel rushed over when they heard the sound, and killed the zombie with a headshot, and then two soldiers asked him something while checking his injury.

He didn't hear clearly, just nodded indiscriminately, and then fell into deep darkness.

Waking up again is now.

The wound on his hand has just healed, and there is still a faint pain. The previous experience is definitely not a dream.

The soldiers who rushed in understood what was happening after a brief moment of stupefaction. They were so excited that they hugged and cheered with the brothers beside them, and it took a long time to calm down.

Seeing his puzzled expression, the soldiers explained: "At that time, I asked you if you would like to be an experimental subject in the scientific research institute. When you nodded, the captain sent you here. You are really lucky!"

If he hadn't volunteered to be a test subject for the laboratory, they could only shoot him on the spot according to the regulations.

At that time, there is no hope of surviving at all!

The patient obviously thought of this too, and couldn't help but be thankful that out of his trust in the army, he nodded indiscriminately even though he couldn't hear what the other party was saying.

The joy of the rest of his life enveloped his body, and he couldn't help weeping with joy.

The ecstatic researcher also gradually calmed down, ignoring who was around him, hugged him, buried him on his shoulder and sobbed softly.

After waiting for so long and persisting for so long, the vaccine has finally been developed.

The end of the goddamn world is finally... coming to an end!