Knowing that Yuan Jing was back, Zhang Yao tried his best to get a glimpse of it first, but Yuan Jing was not willing to take out the gun right away and fooled him: "When I need it, I will go get it. Now you can see that I came back empty-handed, how can I give it to you?"

"Oh yeah, is it safe?"

"Of course it's safe, don't worry."

After Yuan Jing came back, he started digging wells and purchased solar generators and diesel engines. He also turned the land in the yard into a vegetable garden, where he planned to grow vegetables. This was most popular with Zhang's mother. Yuan Jing converted one of the basements into a storage room, which was filled with all kinds of supplies. There were also two large freezers filled with all kinds of frozen foods, including meat and seafood.

Another basement became Yuan Jing's laboratory after the arrival of instruments and equipment. When the temperature outside Y City climbed above 40 degrees, Yuan Jing finally produced a genetic evolution agent. One of them was made into an oral liquid and added to Feifei's water in batches to slowly improve his body. This was also what he had done in that life, so he was not worried that Feifei's body would not be able to handle it.

As for Yuan Jing himself, he completed the evolution very quickly. This evolution actually helped his cultivation and helped him advance to the third level of Qi Refining. He broke through the second level before going abroad. Yuan Jing did not expect that it would have such an auxiliary effect.

There is no doubt that such evolutionary agents can help people improve their physical fitness and better face various extreme environments in the end times, so Yuan Jing did not want to hide it. After producing it in the experiment, he sent the entire production process and formula in the form of emails, and he sent not just one copy, but several copies, to ensure that the formula would not be hidden by anyone.

The people who received the email might be surprised at first and doubt the content of the letter and the formula of the genetic evolution agent, thinking it is a fantasy. However, as long as they enter the laboratory to test it, they will know whether it is true or not. Then they will pay great attention to the apocalyptic issues mentioned in his letter. Yuan Jing hopes that the country can make adequate preparations so that more people can survive the apocalypse and preserve the fire of civilization.

Because of this, Yuan Jing only made two doses of evolution agent for himself and Feifei, and did not make any for the Zhang family. As long as the country discovers the effect of the evolution agent and values the lives of ordinary people, it will be promoted nationwide.

During this period, Yuan Jing took Feifei to the flower and bird market and fulfilled his promise to Feifei to raise two dogs.

Feifei was so excited that day. He looked at the cages of puppies in a place that specialized in selling puppies. He was almost dazzled by the sight. In his opinion, any dog would be good. Unfortunately, his uncle said that the family could only keep two, one for Feifei and one for his uncle. So which dog should he keep? It was so troublesome to choose a puppy.

Finally, the uncle and nephew stopped in front of a cage. The shop owner introduced: "These are all purebred German Shepherd puppies. They have pedigree certificates and are not fake. If you have any questions, just come to me. If you want them, I'll give them a discount."

The weather is hot, and the pet business is also affected. It's really the end of the world. People have nothing to eat, so who would keep pets? So the boss wants to sell them quickly.

"Uncle, let's buy this kind of puppy. Feifei likes it."

Coincidentally, Yuan Jing is also very satisfied with the Blackback. Although the puppy looks silly, it will transform in a few months. The Blackback will become extremely brave and will definitely be a good guard at home.

"Then listen to Feifei. Which two do you like, help uncle choose."

"Oh, so they are uncle and nephew. I was wondering if you would have such a big son at such a young age." The boss smiled and said, "Buy two. This is a big deal."

Feifei bravely reached in to touch them, and some puppies leaned forward to touch them. So he picked two puppies that were close to him, and Yuan Jing was quite satisfied with them. He paid and took the two puppies away.

"Uncle, what should we name the puppy?"

"Let Feifei take care of this task."

"Okay, okay, Feifei will definitely come up with a nice name."

Feifei was thinking about names all the way, and finally decided when she got home. The slightly bigger one would be called Dahei and the slightly smaller one would be called Xiaohei, because puppies are so black. Yuan Jing held back his laughter and praised Feifei for his good choice. So the names of the two dogs in Yuan Jing's family were decided.

At this time, the magical post sent by Yuan Jing became even more popular, because it predicted three consecutive incidents. The official also noticed this post because of those emails and sent special personnel to study it.

"Is the world really about to end? Will we really experience extreme cold weather after experiencing extreme heat as described in the post? Will there only be two extreme seasons? Will there be polar day and polar night? How is this possible?"

"No matter if it's possible or not, we must be fully prepared. We can't pin the country's future on the possibility. Has the laboratory produced any results? Is this gene evolution agent really that effective?"

"Our current technology is simply not capable of this level. I think that potion is just a gimmick."

Some people regarded the email as a joke played by a hacker on them, and they believed that the hacker would be severely punished once he was caught. At this time, news came from the laboratory that the drug indeed contained a vitality growth factor that could greatly stimulate the enhancement of gene cells. This had been verified on the mice in the laboratory, and no side effects occurred.

"Call for volunteers for the experiment immediately."

"yes."

These volunteers were of course recruited from the military. When the physical fitness data of a group of ten people were placed in front of the big guys, they were all shocked. This potion was indeed a gene evolution agent, and the owner of the email did not lie. Moreover, until now, their best technical personnel have not been able to catch the hacker.

Who on earth was it that delivered such an important thing to the country without any request? Was he the same person as the owner of the divine note? Perhaps he came from the future and came back to help the Chinese people overcome the difficulties?

"Commander, what should we do next?"

The top leader said in a serious tone, "Anonymous gave the genetic evolution agent for only one purpose, which is to hope that the evolution agent can help the people survive the difficult end of the world and allow more people to survive, so we can't keep it for ourselves. So I decided to quickly promote it to the public in the form of a vaccine, free of charge, and the money will be paid by the state."

"Yes, Chief!"

Relevant pharmaceutical companies have entered high-speed operation, and all of them are strictly guarded by the military to prevent any information from leaking out.

Because some children in the kindergarten also suffered from heatstroke, the teachers were worried that something might happen to the children in the kindergarten, so they decided to suspend classes and asked the children to stay at home and not go out. Therefore, Yuan Jing and Fei Fei each took a handful of ice cream and chewed it while watching TV, while Dahei and Xiaohei were eating fruit at their feet.

After work, Zhang Yao ran towards Yuan Jing. He was fatter than Yuan Jing, and water could be wrung out of his T-shirt during the entire journey.

Seeing the uncle and nephew enjoying the air conditioning and biting popsicles, Zhang Yao was envious. He was not even as good as the two puppies: "Youngest brother, do you think it's too late for me to change my career and become a famous online author and write online novels?"

He now finds that being a freelancer at home is quite a blessing. He has lost several pounds due to the heat in recent time.

"Uncle Zhang, I'll give you some popsicles."

"Hey, Feifei is the one who loves Uncle Zhang the most." Zhang Yao narrowed his eyes and smiled.

Then a third person joined in, crunching on the popsicle. The TV series that was being played suddenly stopped, and the figure of the country's Minister of Health appeared on the screen.

"What's going on? Does the country have something important to announce? They're not going to announce the end of the world, are they?"

A light flashed in Yuan Jing's eyes. According to the time, it should be about time to promote the medicine. Of course, this also requires the country to step in and make every effort to produce it.

"Dear citizens, I am XXX, the Minister of Health. Due to the weather, more and more people are experiencing various discomfort symptoms. Hospitals across the country are overcrowded. Through the efforts of our professionals, we have developed a vaccine that can effectively reduce the discomfort caused by high fever. The country has decided to promote it to the entire population and give everyone the vaccine. I hope everyone will take the initiative to cooperate with the actions of the local health department."

"Now, I will set an example and pay attention to the epidemic prevention." He said to the health worker next to him, "Come on."

"Yes, Minister."

The minister exposed his entire arm, and a tube of transparent, colorless liquid was slowly injected into his body. Afterwards, not only him, but other important state officials also received injections on the spot.

This was a live broadcast, after which TV stations across the country took turns broadcasting it. Various online platforms also invested heavily in promoting this national vaccination campaign, sparking heated discussions among the public.

Zhang Yao was a little dumbfounded: "There is such a vaccine?"

Yuan Jing touched his chin, thinking that the country had painstakingly made up this excuse to have everyone injected with the genetic evolution agent. However, he was very happy that the government attached great importance to this matter and promoted it comprehensively. He said, "Since they want us to get the injection, then let's get it. It's free anyway, and it's good to have fewer illnesses."

"Yes, then when the temperature drops a little, I will go back and tell my parents, and then take them to get vaccinated." From the propaganda on TV, it is said that people of all ages can be vaccinated. Those senior officials on TV are not young at all, and the oldest is over 70 years old, but they are also getting vaccinated.

It can be said that this time the national leaders set a good example, and most of the people are actively cooperating. Those who really refuse to cooperate with various conspiracy theories and refuse the vaccine will only have to reap what they sow in the future. Only those who refuse to get vaccinated will know the consequences.

Y City has also started publicity, registering and issuing numbers in communities. The injection time will be sent to everyone's mobile phone, and then they will go to the community service point to get the vaccine.

Although Yuan Jing and Fei Fei had both used the evolution agent, using it a second time would not cause any negative effects on the body, except that the effect of the evolution would be much weakened. So, like the people in the community, they went to register with the community, received a number, and waited for the injection time.

Feifei is very strong, as she has received many vaccinations. At most, she will purse her lips and shed a few tears silently, but she won't cry loudly like other children. But it makes people feel more distressed.

"After the injection, let's go home and have some cold drinks. Uncle allowed Feifei to have two today."

Feifei's big eyes lit up, because his uncle had restrictions on him, he could only eat one popsicle and one cold drink a day. This was the amount after Yuan Jing used the evolution agent on him, because his physical fitness was enhanced.

"Have two cold drinks every day from now on." Feifei bargained.

"You wish. Today."

Feifei pouted.

"How about tomorrow? Just two days."

Feifei's eyes immediately lit up again: "Okay, pinky promise."

Everyone else was amused by them, so when Feifei was getting the injection, he was very brave and didn't even sullenly smile. After the injection, he happily went back with his uncle to have a cold drink.

In fact, except for the top leaders of the country, no one below knows that this medicine is not an epidemic preparation, but a genetic evolution agent.

But the effects gradually became apparent after the injection, and people kept posting the changes that happened to them online.

"I'm stronger now. It can't be the end of the world. The air is full of spiritual energy now. This spiritual energy is probably strengthening our physical fitness."

This statement was agreed by many people, because it was not just one person who noticed that their strength had increased. The weak also said that their physical fitness was improving, some said that their running speed had become faster, and finally, an old man came out and said that his originally gray hair had now turned black. This made the statement of spiritual revival accepted by more and more people.

"Why do you think about spiritual energy? Such a large-scale improvement in physical fitness is clearly a nationwide thing. Have you forgotten the recent nationwide vaccination? I think it may be related to this vaccine. This vaccine should help us improve our physical fitness."

"Ghost, what vaccine has this effect?"

“Maybe it’s not a vaccine, but only this statement can be promoted to the whole nation.”

But at first, only a small number of people supported this statement. Later, when those who insisted that they had not been vaccinated came out to confirm that no changes had occurred in their bodies, there was a chorus of "WTF" on the Internet, and more and more people asked the authorities about the truth about the vaccine.