Because the father and son of the Jiang family had not yet woken up from the shock of the beautiful girl vs. zombie just now, they didn't notice it until Ye Feng walked in front of him, and the expression on his face was in a state of shock.

"Are you from the Yashi Self-Help Association?" Ye Feng walked up to the father and son and asked.

After Ye Feng recovered his appearance, he was preparing to leave Ya City, even hunting zombies, trying to choose near the city gymnasium to keep abreast of the movements of the Self-Rescue Association.

The two people in front of him came from the direction of the gymnasium, and Ye Feng speculated that the two people in front of him should be the survivors of the Yashi Self-Rescue Association.

"Yes!" Jiang Dahai reacted first, nodded hurriedly, and then asked respectfully, "Are you the evolutionaries of the Agricultural University Youth Pioneer Group?" ”

Among the survivors of the Yashi Self-Rescue Association, the Young Pioneers of Agricultural University are extremely famous, because many of them are powerful evolutionaries, and in the eyes of Jiang Dahai, only evolutionaries can have such combat effectiveness, otherwise how could a few delicate-looking women kill dozens of zombies in a few minutes.

And the few people in front of him are not very old, but they are about twenty years old, and they look like college students, so Jiang Dahai will think that the other party is the evolutionary of the Youth Pioneer Group of Agricultural University.

"Agricultural University Youth Pioneer Group?" Ye Feng looked puzzled.

In Ye Feng's memory, there was no Youth Pioneer Regiment, and in the early stage of the disaster, ordinary people had a very vague concept of evolutionaries, and they would definitely not clearly say evolutionaries like the two in front of them.

Seeing Ye Feng's puzzled expression, Jiang Dahai instantly understood that the other party was not an evolutionary of the Youth Pioneer Group of Agricultural University, and a trace of disappointment appeared on his face, but he immediately covered up the past and said: "It is a club organized by agricultural students, most of them are evolutionaries, even if they are not evolutionaries, they can be immune to the zombie virus, and their combat effectiveness is very strong." ”

"What? Immunity to zombie viruses? The puzzle on Ye Feng's face was even stronger, if ordinary people want to be immune to the zombie virus, they can only inject the evolution solution, as long as the evolution solution has been injected, even if the evolution is not stimulated, they can successfully immunize the zombie virus.

"As long as you inject the evolution solution, you can be immune to the zombie virus!" Jiang Tianhai said as a matter of course, as if he was very familiar with the Evolution Liquid.

"Where did you get the Evolution Fluid?" Ye Feng looked shocked and hurriedly asked.

Ye Feng clearly remembered that in the early stage of the disaster, Yashi did not have any power at all, and had the ability to extract the evolution liquid, the reason was very simple, the method of extracting the evolution liquid in the broadcast belonged to the first generation of extraction methods, which was quite backward, and the equipment required was also very complicated.

In the whole of Yashi, there are only two places with this kind of extraction equipment, namely the Second People's Hospital of Yashi City and the Animal Laboratory of Agricultural University.

The Second People's Hospital of Yashi City, the largest hospital in Yashi, is located in the densely populated urban area of Yashi, after the outbreak of the disaster, the number of zombies is amazing, almost equal to the forbidden land, and the equipment there is naturally no one can take out.

The second is the animal laboratory of the Agricultural University, which itself has more than 30,000 students, and is located in the old city, and the density of zombies is extremely terrifying, and it is almost impossible to transport the equipment from the Agricultural University.

Ye Feng was able to use the equipment of the Ya Academy Laboratory Building to extract the evolution liquid, entirely because Ye Feng had mastered the fifth-generation extraction technology, which was simple and convenient, and did not require much equipment, and the equipment of the ordinary laboratory was enough to complete the extraction.

However, the fifth-generation extraction technology was only mastered by genius scientists more than ten years after the end of the world, and now it is only the early stage of the catastrophe, and mankind has only developed a very complex first-generation extraction technology.

Jiang Tianhai looked at Chen Yalu and the girls next to him who had finished collecting the crystal nucleus, and his face showed a trace of incomprehension, according to the proficiency of these women in digging crystal nuclei, they should know what the crystal nucleus is for, and they should not know that the crystal nucleus can extract evolution liquid.

Although Jiang Tianhai was puzzled, he still took out two red crystal nuclei from his body and said, "It's the evolution liquid extracted with this." ”

"I mean who helped you extract the Evolution Liquid?" Ye Feng frowned, it seemed that the development trajectory of Yashi was a little different from the original, and this uncontrollable development trajectory made Ye Feng a little worried in his heart.

"It's those students of the Agricultural University, they brought out some equipment from the laboratory of the Agricultural University, and they are high-level students, they have technology, according to the radio prompts, they quickly succeeded in extracting the evolution liquid, as long as you have 600 crystal nuclei, you can exchange for an evolution liquid." Jiang Dahai explained with a look of adoration on his face.

In Jiang Dahai's eyes, college students are the pride of the sky and synonymous with everything they know, and in this disaster, those students were able to extract the evolutionary liquid, which naturally made Jiang Dahai worship more and believe that knowledge is power.

It's just that Jiang Dahai doesn't know that 99.9999 percent of college students, even if they have equipment, are still unable to extract the evolution liquid, and agricultural college students can extract the evolution liquid, not because of the knowledge they have learned in school, even if they call a university professor to extract it, they may not be able to succeed.

However, in the eyes of a crude person like Jiang Dahai who can't even write his own name, it seems that as long as he is a college student, he can extract the evolution liquid, and he doesn't understand that more than 90% of the knowledge learned in school can't be used.

People who worship culture are often people with low social status, no money, no power, and no culture, because they are ignorant, so they are in awe, and instinctively think that as long as they study hard, they can get ahead and be a good person.

"What? 600 crystal nuclei, why don't they grab them. Liu Xinmei, who was standing on the side, looked surprised when she heard this.

Liu Xinmei and Ye Feng exchanged for evolution liquid, only 300 crystal nuclei were needed to exchange for an evolution liquid, but many times, they often only needed 200 crystal nuclei to exchange for an evolution liquid from Ye Feng's hands, after all, Ye Feng used the most advanced fifth-generation extraction technology to extract an evolution liquid, and only a few dozen crystal nuclei were needed.

Now I heard that Jiang Dahai and the survivors of them need 600 crystal nuclei in exchange for an evolution liquid, and instantly feel that the other party has been pitted, 600 crystal nuclei is not a small amount, even if Liu Xinmei, who is a one-star evolutionary, wants to get 600 crystal nuclei, she has to hunt zombies for several days in a row.

Ordinary people who are not immune to the zombie virus and whose physical fitness has not evolved want to hunt 600 zombies to obtain crystal nuclei, which is almost impossible, which is equivalent to letting a farmer who has been digging the land all his life earn one million within a month and under legal conditions.

"If you can join the Youth Pioneer Group of Agricultural University, you can get a discount, only 500 crystal nuclei can be exchanged for an evolution liquid." Jiang Dahai smiled helplessly, and said, "If the evolution liquid is so easy to obtain, we don't have to be afraid of zombies." ”

In fact, 600 and 500 crystal nuclei, for Jiang Dahai, there is not much difference, because they can't afford to exchange it, their father and son came out to hunt zombies and obtain crystal nuclei, not to exchange for evolution liquid, but to exchange crystal nuclei for living materials.

In the Yashi Self-Rescue Association, the crystal nucleus is a hard currency, equivalent to the currency before the disaster, which can be exchanged for all supplies.

Ye Feng didn't show much surprise at the exchange of 600 crystal nuclei for an evolution liquid, and instead said: "Now we are trying to go to the Yashi Self-Help Association, but we are a little unfamiliar with the situation inside, can you tell us in detail about the situation inside, and what is the Agricultural University Youth Pioneer Group." ”

Now Ye Feng has believed that the future development trajectory has been quietly and silently changing, after all, Ye Feng's appearance is a variable, and he has done so many things in Yashi, under the chain reaction, the pattern of Yashi has changed a lot.

Therefore, what Ye Feng is most concerned about now is how big this change is, and whether it can be controlled, but his intuition tells Ye Feng that this butterfly effect is definitely not small, after all, according to the original development trajectory, it is absolutely impossible for Yashi to extract the evolution liquid.

This evolutionary fluid is the biggest variable.