At first, Tie Dan was reluctant to sell the spark source to Yang Zhou, because he didn't know how to copy the spark source, but after learning how to copy the spark source from Yang Zhou, he was actually free to sell the spark source.

And there are not too many technical restrictions on Yang Zhou, after all, Tie Dan does not have many additional memories other than technical information.

It is not known that there is a huge competitive pressure between hosts at level nine.

He is also willing to exchange technology for the World Tree, which will develop greatly and faster, and Yang Zhou naturally wants to obtain all the information of Tie Dan.

For example, how to build a high-tech spaceship, how to transform a planet to become a battle star.

These are the things that Yang Zhou urgently needs.

What Yang Zhou also needs is combat effectiveness, the biggest hidden danger of Mars now is that it has no combat ability, the World Tree can be controlled at will, and this ability has no ability to resist in the face of real mushroom bullets.

Maybe a modified tank can destroy the crater base established by Yang Zhou on Mars.

After Yang Zhou learned that Tie Dan was willing to sell technology, he hurriedly asked, "Tie Dan, is there a combat device on the spaceship?" What I want is the entire spaceship, and I hope to get the spaceship's seed genes! ”

Tie Dan replied, "Yes, high-energy particle railguns, laser weapons, protective shields, etc. ”

In fact, there are more powerful weapons, but Tie Dan doesn't plan to tell Yang Zhou that he doesn't plan to sell all the technology to Yang Zhou, but plans to sell it little by little.

You must know that the most valuable thing he has now is the various technical information he has mastered.

A lot of these materials can be transmitted by the fire source, and many of them are physical technologies, so this kind of thing cannot be passed on to Yang Zhou in the form of biological genes.

Instead, through chatting, the technical information was told to Yang Zhou.

In order to have a good relationship with Yang Zhou, Tie Dan passed the nanorobot technology to Yang Zhou in the form of chat, but it took a few months, and now the chat record between the two is very long.

Tie Dan roughly knew the level of science and technology on Yang Zhou's side, and knew that even if Yang Zhou obtained nanorobot technology, it would be difficult to achieve it.

In addition, it is also very time-consuming to transfer all the data from the chat history to the outside world, Tie Dan asked Yang Zhou and learned that Yang Zhou is not currently researching nanorobots.

Nanorobots are still relatively rudimentary technology in Tiedan, and it is difficult for Yang Zhou to achieve such a technology, and Yang Zhou is even more unable to achieve more powerful physical technology.

The most valuable thing about the iron egg is the technology that can be planted, such as the plant engine.

This technique sells one piece less than one, and Iron Egg will not sell the complete ship, but one accessory at a time.

"That's great, I need all the technology, or let's trade it directly, I'll give you the World Tree, and you give me the complete spaceship technology." Yang Zhou asked tentatively.

"No, the spaceship technology is too complicated, involving countless parts, each of which is taken out separately, I'm afraid it is worth hundreds of millions of experience points, and the complete spaceship technology is far more than 10 billion, so let's trade it separately, for example, like the engine last time, I will sell the individual technology to make up enough 10 billion and then buy the World Tree with you." Tie Dan replied.

Yang Zhou was naturally very unwilling, and tried to persuade again, but the result should be the bottom line involving iron eggs, and there was no possibility of negotiation.

I had to negotiate with Tie Dan to sell those individual technologies, and what the unit price of these technologies was.

There are too many technical contents of the spaceship, and Tie Dan doesn't want to give examples one by one, even if he tells Yang Zhou a lot of things, he can't understand them, and Tie Dan has to explain them in detail.

In addition, because the iron egg itself does not require oxygen, the spaceship is not designed for human survival.

It doesn't have a cabin for human use, only a separate cargo compartment, and everything else is solid.

"Let's talk about your needs, in addition to spaceship technology, I also have a lot of other fire source plants, which can be sold to you, maybe it can solve your difficulties." Iron Egg suggested.

Yang Zhou agreed, he didn't understand many of the terms Tie Dan said just now.

"Weapons, I want to have weapons first, the World Tree was planted by me on a planet with thin air, this planet is only developed by me, but it is only more than 50 million kilometers away from my home planet, human beings are already using plant engines, they can come to this planet in about half a month, they can destroy my base at any time, so that I can't transform the entire planet, I need self-protection ability." Yang Zhou told him about his situation.

Tie Dan still didn't understand, because according to his thoughts, Yang Zhou had now reached level 7, a full level 6 higher than him.

He must be able to come into contact with all kinds of black technology plants, and even have high-level host friends other than him.

Maybe there are special friends like him.

These people can provide a lot of help, and these days through trading iron eggs, it can be seen that Yang Zhou is not short of experience points.

Then why haven't you gained a firm foothold on your own planet, and you're still worried about the threat of human power on your planet?

Tie Dan asked suspiciously: "Yang Zhou, you are level 7, haven't you conquered your own planet yet, and now you have to worry about the threat from the home planet when transforming other barren planets?" ”

Yang Zhou was a little embarrassed, Huaguo has its own national conditions.

If you really want to develop without scruples, it is naturally to cooperate with the above, tell them the secrets of the system, and then use Guo Jia's power to develop in large quantities.

But Yang Zhou instinctively felt that this kind of behavior was too dangerous, and he might encounter unknown dangers.

For example, looking at some networks, I wrote about cooperating with Guo Jia, and in the end I disappeared inexplicably....

Based on various reasons, Yang Zhou chose to develop independently, so that some big people will not be involved and he has the ability to be independent.

Yang Zhou dared to promise that if his biggest secret was exposed, his family would be closely "protected" as soon as possible.

If you don't obey yourself, it will be very dangerous.

Now it's different, he found the perfect excuse not to reveal that he was very special, all because of the mushroom man.

He created a whole new civilization.

If this civilization develops in the future, it may be able to become his foreign aid and hole card.

Now is the time to increase the foundation of this civilization, and wait for the fake mushroom civilization to become a real mushroom civilization.

Yang Zhou can even break away from the earth and develop outward on his own, so he doesn't have to worry about some unspeakable things.

Yang Zhou's contribution to the earth is not small, the cancer crisis is solved by him, the hybrid rice has also been transformed, and there are other plants, but now Yang Zhou's status has still become a little marginal.

Now Yang Zhou only feels a little tired, and if he comes up with any technology in the future, others will also wonder if he promised to give the mushroom civilization benefits to get these technologies.

Others are even more worried about him.

Now the problem is trust, maybe when the mushroom civilization really shows the ability to destroy the earth at any time, everyone will know that people don't need to treat the earth civilization in any other way.

Yang Zhou will naturally get rid of suspicion, and even become a link to communicate with the mushroom civilization.

At that time, the crisis of confidence was naturally resolved.

"Tiedan's situation on my side is very complicated, I can't explain it to you clearly, now I need a weapon, what weapon genes can you provide me?" Yang Zhou asked.

Weapons are not only used for Mars defense, but also for the Great Filter Crisis, and the most important thing is that when you reach level 9 in the future, you will have weapon plants and your self-protection ability will be much stronger.

"No matter what kind of weapon, you need an energy system in the end, you have to buy an energy system first, and I think you can supply the consumption of weapons." Tie Dan replied.

"Then naturally we have to buy together, what is the energy system like, what is the conversion of solar energy?" Yang Zhou asked.

Tie Dan smiled and replied, "The solar conversion efficiency is too low, and atomic energy can meet the demand." ”

"Atomic energy is just to produce energy, and the thing that stores energy is called high-energy crystals, and this kind of thing is the most important, and some planets may have this mineral, which is a hybrid element that was born with a very small probability during the Big Bang."

Yang Zhou thought about the earth's batteries, and now new energy technology is developing rapidly, with lead-acid batteries, nickel-metal hydride batteries, lithium manganese oxide batteries, and lithium iron phosphate batteries.

The various batteries are not yet composed of special elements.

The high-energy crystal proposed by Tie Dan is probably a special crystal that appears with a very small probability of the natural evolution of the universe.

This made Yang Zhou embarrassed, he didn't have this kind of high-energy crystal here.

"Then what should I do, can high-energy crystals be grown?" Yang Zhou said curiously.

"Naturally, plant technology has reached its peak, anything can be planted, haven't you seen engine plants? Moreover, the source of the fire, my body, is that all kinds of elements are combined and arranged through special forces to form wisdom, and the energy body can have wisdom, what else is impossible. Tie Dan said proudly.

His body is one of the wonders of the universe.

Perhaps even more miraculous than the birth of a black hole.

Iron eggs have an almost eternal lifespan, so they will naturally be very proud.

In Tie Dan's opinion, Yang Zhou's life is too fragile, and even if Yang Zhou is level 7, his understanding of the whole world is still very shallow.

Although Tie Dan is level 1, his vision far surpasses that of Yang Zhou.

"Okay, it seems that the high-energy crystal plant is also going to have a group..., you can calculate for me, what weapons do I need to achieve Mars defense, what technical support is needed to match the weapons, and it is best to be able to defend against external threats in space."

"For example, when a human spaceship flies to Mars, which is my barren planet, I can kill them in outer space." Yang Zhou said ruthlessly.

He knew that he was afraid that he would be ripped off.

Originally, he mastered the World Tree, and he didn't take the initiative, because according to the current development, Tie Dan can also make a spaceship, but it will take a lot longer.

The World Tree was not necessary for Tie Dan, but Yang Zhou was in great need of various advanced techniques.

Tie Dan smiled with satisfaction, but there are many things that still need to be reminded of Yang Zhou.

"High-energy crystals are naturally to be sold to you, but I want to remind you that many plant growth environments also have needs, space spring water is not omnipotent, it does not contain radioactive elements, and high-energy crystal growth environment requires radioactive elements, such as uranium to make mushroom bombs." Iron Egg reminded.

Yang Zhou and Tie Dan communicate, the text language may be different, but the system automatically translates it into words that Yang Zhou can understand.

This may also be the reason why the system does not allow real-time voice and video communication.

For example, two different civilizations, when they are on video, have no idea what the other party is talking about.

However, the text can be translated flexibly, and perhaps the system contains the words of countless civilizations in the universe, which have been freely converted.

When Yang Zhou heard that the radiation element was needed, he immediately frowned, is there a radioactive element on Mars?

It seems that the World Tree has been developing for so long, digging holes everywhere under the south pole of Mars, and no radioactive elements have been found.

It would not be appropriate to let the Earth transport radioactive elements to Mars.

It's easier to understand that only Earth civilizations are allowed to provide replicating fungi for now, after all, mushroom civilizations may have the same origin as replicating fungi.

Replicating fungi are very special and give birth to replicating spores, which is very helpful for plant civilization.

But the radioactive elements are provided by the earth, which makes the purpose doubtful.

Maybe it will cause a conflict, so that the Earth civilization can test the heritage of the Martian civilization in advance.

However, Yang Zhou quickly thought of another element, which is the isotope of helium.

There are many isotopes of helium, among which there are eight known helium isotopes, including helium 3, helium 4, helium 5, helium 6, helium 8, etc., but only helium 3 and helium 4 are stable, and the rest are radioactive.

Yang Zhou immediately asked: "Helium three can work, but it doesn't seem to be radioactive." ”

"Yes, helium three is also an element that can be fused, and the most important thing for high-energy crystal plants is actually to produce energy through fusion, extract absorbable elements in fusion and finally fuse them into high-energy crystals, and one ton of helium three can extract 6,300 tons of hydrogen, 70 tons of nitrogen and 1,600 tons of carbon, which is a very good high-energy crystal fertilizer." Tie Dan explained.

Yang Zhou was suddenly excited, if helium three could be used to grow high-energy crystals, then he would have a way.

According to scientists' estimates, the moon alone contains 715,000 tons of helium-three.

The Moon's helium-3 is accumulated by absorbing the energy elements in the solar wind from the lunar soil.

There are not many helium-3 on earth, and the largest source of helium-3 used is still obtained by dismantling nuclear bombs.

Of course, helium itself is very scarce on the earth, and only underground natural gas contains a small amount of helium, not to mention helium, a stable isotope of helium.

Speaking of which, all of this is due to stellar energy.

The elements inside the star collide, bringing light and heat, and even a variety of rare elements.

According to scientists, the universe originated from the singularity, when the Big Bang produced all the elements in the universe.

It's all a cycle.

Theoretically, any element in the world can be obtained by the collision of elements, by trapping lost electrons between each atom.

Perhaps the plant growth principle of high-energy crystals is also related to the combination of elements.

Yang Zhou immediately asked the price that the high-energy crystal plant must be taken, and then the weapon plant must be taken, there is energy and weapons, and then there is a spaceship or other mobile device that can be equipped with weapons, then Mars will have the ability to protect itself.