After I lost my job, I started to get rich from plane trading.

When Li Yuan handed the documentary he obtained from Su Nianwei to his friend Jiang Chengying after special treatment, Jiang Chengying was overjoyed.

Although this documentary is not his preferred war documentary, he can feel the symbol of ancient earth civilization from this documentary.

Obviously, many of the plants in this documentary have not been recorded in the interstellar world, or even similar ones.

He knew that his friend had some secrets, but he didn't expect that it would bring him such a big surprise.

The things Li Yuan gave him last time had already surprised him. Looking at the things in his hands, he ignited the hope of retro civilization.

He broke his original intention of not asking about his friend, and chose to ask anyway.

"Where did you get such treasures?" Jiang Chengying bumped Li Yuan's shoulder and asked him.

"You can't touch the left and right, only I can do it." Li Yuan replied to him.

"Then can you get some more?" Jiang Chengying knew that Li Yuan would not lie to him.

In that case, let him do it.

"You have to know that I spent a lot of money to get this thing. You also know that as a retired person, I need to take good care of myself." Li Yuan said with a smile.

"How much does it cost? You have to know that these things are priceless treasures." Jiang Chengying almost grabbed Li Yuan by the collar and shook him hard.

Many people can't even ask for these things, so why would they care about the price?

"This is not a matter of money. I spent a lot of energy to get this." Li Yuan raised his eyebrows.

"Isn't the war over now? Why do we still need so much energy? Could it be..." Jiang Chengying became wary.

"No, I can be sure that the other party has no malicious intent." Li Yuan still believed in the system on this point.

What's more, it's not that he looks down on Su Nianwei, but in Su Nianwei's plane, there is no mecha for her to build.

"Then later, I will mine the energy minerals on my planet, and you will buy them for me. But if I run out of money in the future, you will have to support me." Jiang Chengying said to Li Yuan with a playful smile.

"I can buy it on my behalf, but I'll just feed you. If you can't survive in the future, then you'll starve to death." Li Yuan couldn't see him like this.

"However, I still suggest that you first ask what exactly the energy is used for." Jiang Chengying was still a little worried.

"Okay, I asked her the last time I met her."

In fact, Li Yuan is also a little curious. Logically speaking, Su Nianwei's plane is similar to the Earth Star. For them now, it is just a relatively primitive ancient civilization. How can it need so much energy?

Time soon came to the transaction date agreed between him and Su Nianwei. After completing the routine transaction, he asked the question that had puzzled him for a long time.

"Miss Su, may I ask you a question?"

"Say." This was the first time Su Nianwei saw this man like this.

"I don't mean to offend, I'm just curious as to why you need so much energy. You know, in our plane, so much energy is enough to create chaos." Li Yuandao.

Su Nianwei thought it was not a big deal, so she answered him: "Because there are some problems in our plane, and I need to use this energy to try to find a solution to these problems."

"Can I know what the problem is?" Li Yuan frowned.

Su Nianwei thought for a while and decided to tell him the reason. What if he knew how to solve it?

So she started with the matter at the Hot Spring Villa and told Li Yuan exactly what had happened, only concealing some issues from other dimensions.

When Li Yuan learned that those infected by the pollution source had bleeding from their orifices, looked dazed, and even had the intention of hurting others, his expression changed drastically.

"Yes, what's the problem?" Su Nianwei felt that his expression was wrong.

"I may need to sort out my thoughts, and I'll tell you when I think of the answer." After Li Yuan replied to her, he hurriedly switched contacts and left.

Su Nianwei was left with a puzzled expression. But thinking of the other person's thoughtful look, she decided to wait.

Li Yuan was thinking of nothing else but the Zerg.

Although the Zerg disappeared from the stars after hundreds of years of war, no one can forget the huge harm they caused.

The scene described by Su Nianwei is a bit like when the first generation went to the battlefield, the soldiers were infected and turned into puppets.

There were no mechas at that time, and people didn't know how terrifying the Zerg were, so they just formed an army to encircle and suppress them.

At first, it seemed like every day was a good news, but soon something unusual happened to the soldiers returning from the border.

Just like what Su Nianwei said, many people were bleeding constantly, their eyes were red, they were in a daze, they had no consciousness, and they were constantly attacking people around them.

After sacrificing many people, the institute finally discovered that they were infected by the Zerg virus.

They desperately discovered that based on humanity's current technology, there was no way to avoid Zerg infection.

The institute has divided two organizations, one to study how to eliminate the virus brought by the Zerg, and the other to study how to avoid being infected.

Later, mechas appeared. The emergence of mechas has helped some warriors gain the ability to resist storage viruses.

But this is not absolute. Many people who go to the battlefield will be affected by the virus to some extent. In order to protect these bloody warriors, the Federation repeats the same mistakes and replaces them every few years.

The soldiers on the front lines were moved to the rear to recuperate, but this could only be postponed, and the fundamental problem was still not solved.

Although this method can avoid Zerg virus infection, long-term pollution has greatly affected their lifespan.

Many people who came back from the front line died of old injuries before they were seventy years old. In a world where the average life expectancy is two hundred years old, it can be said that they died young.

Fortunately, the Zerg have been eliminated now. Their generation should be the last generation to fight against the Zerg and have their lifespan affected by the infection.

Based on Su Nianwei's description, Li Yuan felt that the pollution source in her hand was a bit like the root of the Zerg.

The Zerg were not called Zerg at first. They were creatures infected by the virus.

With the infection of the virus, their shape gradually changes, slowly becoming deformed, and they are extremely aggressive and infectious.

Since the vast majority of infected organisms are insects, people collectively refer to these infected organisms as Zerg.

Li Yuan once went deep into the front line and wiped out several Zerg nests, so he had also seen the roots of the Zerg family.

So he suspected that Su Nianwei's plane was also invaded by the virus.

And if Su Nianwei's method can really solve the Zerg virus, then this can also be regarded as a solution to the problem that has plagued the interstellar for many years.

If this is true, he will help Su Nianwei complete this matter at all costs.

If nothing else, doesn’t he still know? It is true that the Zerg on the interstellar planet have been eliminated, but there is no way to deal with them at all. This is a hidden danger that can explode at any time.

Li Yuan thought for a while and dialed his old boss's communication...