99% survivability [unlimited]

The heavy-duty truck is indeed very high, and the design surrounded by iron sheets is very effective in preventing zombies from climbing up, and it can also pile up enough supplies.

But no matter how high the height of the truck is, it will be more difficult for Su Mian to climb up, and it really won't need someone to catch it when it comes down.

Su Mian looked at Yi Yan who was under his line of sight at this time, he felt that he was hesitant when he jumped from the second floor, so it wouldn't make him feel so weak, right?

"Don't worry, you are very light." Seeing the hesitant expression on Su Mian's face, Yi Yan said again.

"?" The point doesn't seem to be this, does it?

But it's not right for the two of them to be deadlocked here. Seeing that the crowd over there had gathered their eyes, Su Mian stopped thinking about it and jumped down towards Yi Yan's position.

Yi Yan held his waist and put him on the ground.

"A newly rescued person?" Someone asked at the other end.

"Well, both of them have good abilities. We brought back so many supplies this time, and they are indispensable." It was Xia Zhiyi's voice.

It is a fact that Yi Yan's ability is good, but Su Mian doesn't think she has any strength in collecting materials.

In the last days, the requirements for the value of human beings have also increased. Many bases are not willing to accept people who live for nothing. If you want to rely on staying in the base, you have to pay the corresponding labor force.

At this time, it cannot be said that there is no humanity and no compassion, and when you can't even survive yourself, you can no longer be restrained by the morality you used to have.

It was obvious that Xia Zhiyi's words carried a lot of weight. After he said that, the others smiled and looked at Su Mian and Yi Yan, expressing their welcome.

The materials on the truck will be carried by personnel, Xia Zhiyi took Su Mian and Yi Yan inside first, intending to settle them down first.

As Xia Zhiyi walked forward, he introduced the basic situation of the base to the two of them.

Su Mian is not the only one who doesn't understand this world, Yi Yan is the same.However, when the task of arriving at the base was completed, the system finally gave a brief introduction to the world of this dungeon.

[The outbreak of zombies in this world was more than a year ago, and now the number of zombies has already surpassed that of humans, and the survival of humans has been greatly threatened. 】

[The base is the only shelter, but it is not a safe place. 】

[The infection of zombies is still an unsolvable thing, and the research of a vaccine against the zombie virus has become the most anticipated thing at the moment. 】

[Unlock side mission: Help develop a vaccine]

This side mission... No matter how you look at it, it is more difficult than the main mission of survival for nine days.

But since the system will issue this task, it proves the special nature of this base.

After understanding it, I know that this end-of-the-world base is divided into four levels from the first level, and the first level is the largest. There are a lot of equipment and materials in such bases, and even a production link can be formed.

And the fourth-level base is the smallest, and the human beings there will have problems even surviving, it is a real 'temporary refuge'.

To describe the absolute crisis in this world, the base where Su Mian is currently located can be used as an example. This so-called first-level base of the highest level actually shelters no more than a thousand human beings.

The reason why H19 is called a first-level base by Ferro is because this base is one of the sites for vaccine research.The bases that can still be used for research are regarded as places where the light of hope lies.

These Xia Zhiyi didn't hide from them, and there was nothing to hide. Telling them would make them pay more attention to this base and be more willing to pay for their labor.

"You guys should live in the same place as us, and you may need help to go out frequently to find supplies and rooms in the future..."

"It's enough for the two of us to share one room." Yi Yan took the words.

Xia Zhiyi turned his head to look at the two of them, his eyes paused on Su Mian, and found that he also agreed with this matter, so he nodded, "Okay, I'll find you a bigger room."

The current situation is that it is good to have a place to live, but as the backbone of the base, Xia Zhiyi and the others often go out to find supplies, so the place to live is not bad.They lived together in a hotel, and the elevators inside were still working.

There is already a relatively complete system and facilities here, with electricity and water, as long as you use it sparingly, there will be no shortage.Xia Zhiyi told them that they could take a bath tonight, and gave them a set of clothes and a piece of soap.

After Xia Zhiyi left the room prepared for them, Su Mian subconsciously looked at Yi Yan, who said, "Go take a shower first, and then we'll talk about the mission in detail."

Su Mian, who had long wanted to get rid of her dirty body, nodded and went into the bathroom.He didn't dare to use water indiscriminately, so he washed it quickly, at least all the dust on the surface was washed away.

Fortunately, the clothes Xia Zhiyi gave were also long-sleeved, which could still cover the obvious teeth marks on his arms.

After Su Mian finished washing, Yi Yan went in, and the other party quickly washed the dust off her body, and saw Su Mian standing by the window looking out.

The young man is really thin and thin, and even petite is not an exaggeration to describe him at a glance.The sunlight from outside fell on his beautiful face.

This face was covered with dust before, but it was still very attractive. The root cause is probably because of those eyes.Like a deer, it has a feeling of being weak and pitiful and needs to be protected.

As long as you are caught by these eyes, you will have the urge to protect him.Even though his face was covered with dust, he could still see the beauty of this face.

And now, this face has also revealed its original posture, which will only make people feel more and more wanting to hold it in the palm of their hands.

Sensing Yi Yan coming out, Su Mian turned around, went to the bed and sat down, meaning to have a good chat with him.Yi Yan walked up to him and sat down, and still confessed his mission first: "The branch line I just received is to help develop vaccines."

Su Mian nodded: "Me too, but even if the vaccine development is not hidden from the public, we are not professionals, so it may be difficult to participate."

"It's not necessarily true. It takes at least four dungeon players to open it. Now we only have two here."

"You mean, there may be players among the people who develop the vaccine?"

Yi Yan nodded.

Thinking about it this way is indeed very possible. The previous dungeons will gather players in one place. If the core of this dungeon is to find a chance for human survival, the H19 base for researching vaccines is the best player. Assembly place.

"It should be easy to confirm whether there are any players among the researchers. What we need to determine now is whether this side mission should be completed within nine days of the main mission, or whether it can continue to be completed after nine days."

If the time required to complete the side quest is within the nine-day range of the main quest, then they only have about six days to complete the quest.

But if it is said that the side quests can still be completed after nine days, it will prove that both the main quest and the side quests need to be completed before leaving this instance.

Su Mian thought for a while and said, "I think the meaning of the system should be to develop a vaccine within the next six days."

Since the side missions are unlocked and opened, they must be carried out on the basis of the main mission, but I don’t know what will happen if the main mission is completed and the branch mission is not completed.

"Coincidentally, I think so too." Yi Yan responded.

Just develop a vaccine in six days, is it possible?

Since the system has given the value, it should be possible to do it.Besides, Su Mian is actually a very good experimental subject now.

When the time comes to show the wound directly, the researchers will know whether he is a human or a zombie now.

It's just that this matter is still risky, and Su Mian doesn't like the feeling of being treated as a guinea pig, so she decided to take a look at the place where vaccines are researched if she has the chance.If there are really players who are researchers, they can discuss cooperation.

After they set their goals, they left the room together, planning to go around the base to familiarize themselves with the environment, and inquire about the place where vaccines are researched.

They had just left the room and walked a distance when they saw Qian Yingtai coming out of a room not far away.When he saw the two of them, his eyes lit up, and he walked over quickly: "Good guy, I knew you should be good-looking when I first met you, but I didn't expect to be so beautiful."

While the word "beautiful" may not be commonly applied to men, it doesn't favor one side at the moment.

Isn't it beautiful?It is estimated that no matter where he goes, he will immediately attract the attention of other people.

Su Mian also accepted the word, and after chatting casually with him, she began to ask him about vaccine research.Qian Yingtai is not surprised by this. In his opinion, Su Mian and Yi Yan should just ask about the progress of the vaccine because they are concerned about the progress of the vaccine.

So he told Su Mian and the others about the approximate location of the research room: "However, the people who study vaccines are not very easy to get along with, so it's better for you to try not to get close to the location over there."

In order to ensure the smooth progress of the research, there are still a group of people guarding the laboratory to prevent others from disturbing the researchers.

"Speaking of which, we plan to go outside to catch a zombie tomorrow, is Brother Yi Yan with us?"

"Catch zombies?"

"Yes, the vaccine is equivalent to an antibody. The virus still has to be collected from zombies. Originally, some zombies whose heads were shot were brought back. Recently, researchers discovered that live zombies are different from dead zombies, so let us catch them alive. gone."

Researching vaccines is also a very dangerous thing. At first, considering the danger of living zombies, I didn't dare to take risks.After all, the effect caused by a zombie is extremely huge. They also wanted to extract toxins from the teeth of the zombie to make antibodies.

However, the toxins extracted from the dead zombies seemed to be dead, without the slightest activity, let alone being used.Later, they found that the virus carried by the zombies with shorter death time was also more active, which was more helpful for their research.

Based on this speculation, living zombies should be the best.

Hearing what Qian Yingtai said, Su Mian felt that it is not impossible to develop a vaccine within six days. In their view, the research process may only take a few days, but in fact these researchers have studied for more than for a year.

Now it is only one step away from success.