Taking advantage of the following time, Long Yi proposed two schemes for this new machine: air-cooled and water-cooled. Air cooling is simpler, while water cooling is better, but it may not be possible to achieve it because of material technology problems.

Eventually, Ryuichi decided to solve this problem by adding more heat dissipation fins and adding a large fan.

When Long Yi brought up the word fan, everyone was puzzled for a while, they thought that Long Yi was going to add an iron plate that shook from side to side. But when Ryuichi drew the shape of the fan, everyone was stunned.

"This thing, can it get windy?"

Angel and Morton asked together.

"Yes, of course you can!" has been blowing the fan for so many years, and Long Yi still has this confidence.

There has never been a fan blade of such a shape in the world, and as a giant, Long Yi is almost not afraid of the cold and heat, and he has never thought about the fan. Now suddenly a fan blade came out, and everyone was immediately frightened.

Long Yi made a simple three-bladed fan out of cardboard, and when the fan blades rotated to generate air volume, everyone was dumbfounded.

That's fine!?

The dwarves carved the building into the cave and of course had a ventilation system, but they used the passive ventilation circulating by the natural air volume, rather than active ventilation. As for humanity, no one has ever thought of such a thing!

So, the new tech tree was lit up, and Angel and Morton were left to think about it.

"Otherwise, make a batch of crystal core fans and send them to those rich old men?" Long Yi thought at this time, but the more he thought about it, the more he felt that this kind of thing was reliable! Why don't I make some crystal-nucleated cars to sell? Wouldn't that be more profitable?

Hahaha! I'm a genius!

The tractor thing is not a big problem, just the cooling system. In less than two days, the problem was basically solved. As for the question of the Fertile Federation. Then it's not that Long Yi can control zhì. After all, it will take some time for the tractor to be tested before it can really be used on the road, and in any case, spring ploughing will definitely not be able to catch up. However, if the progress is fast enough, it may be possible to catch up with the summer planting.

The Fertile Fields Federation as a whole is located in the south, with fertile soil, abundant rainfall and proper sunlight. You can cultivate almost all four seasons of grain in a year. Therefore, Long Yi did not have to worry about the uselessness of his tractor at all. At the same time, the Fertile Wild Federation has also received relevant news. The messengers were disappointed to learn that the tractor could not be used in a short time. However, after hearing Long Yi say that maybe Xia Geng could use it, they became excited again. After all, this time, it was Long Yi's personal guarantee.

In solving agricultural problems. The dragon came to the elf shop pù to the silver of the yao. Over here. The twin elf sisters are waiting for Ryuichi to appear.

"I'm here, what's the matter?" Don't talk any nonsense to the elf, Ryuichi asked rather neatly.

"The Empress has asked me to inform you, Lord Dragon, that this is a request from Lord Silverdragon, who has an extremely important item lost in the ocean. It seems to have resurfaced in recent times, and she asks for your help finding that thing. The elven sisters spoke at the same time, with a harmonic effect.

"What exactly?"

"Fire control radar. ”

Damn! Even the fire control radar was lost? This is disintegrating in the air, isn't it? This is definitely disintegrating in the air, isn't it? How can it still be so alive and kicking around after it disintegrates?

"Okay, where did you leave it?" asked Long Yi helplessly.

"The fire control radar has been salvaged by the Sea Tribe. But the princess refused to return it, saying that everything that was caught in the sea was strange and strange. They all belong to her eldest brother. We guessed that the big brother of Long in her mouth should be you, so we asked you for help. The elf said.

Okay, it turned out to be a big circle, and in the end, the elves and the sea clan are the same!

"It just so happens that the princess of the Sea Clan has already contacted me, I'll figure out a way to deal with this matter!" Long Yi said.

"Okay, we'll wait here for your news, if the Sea Clan doesn't refuse to return the things of Lord Silver Dragon to us, then we have only one way to war!"

The dragon nodded, signaling that he understood, and he had no doubt that the elves were doing what they said. As soon as the dragon left, the two elves looked at each other: "Do you think that the dragon master understands that we are joking?"

"Our expressions were obvious, with the strength of the Dragon Lord, he must have seen it immediately. ”

"I think so too, in order to be able to communicate more perfectly with the dragon master, we need to practice more. ”

Long Yi didn't know what was going on behind him at this time, but summoned Xiao Yu and rushed straight to the sea, nearly one-third of the White Dragon Empire's borders were coastlines, and there were embassies set up by the Sea Clan in the three coastal cities. The dragon kept rushing to the embassy where the news came, the embassy had already prepared the submarine, and within ten minutes, Long Yi had left the land and entered the dark underwater world.

With the experience of the last trip, this time Long Yi is also familiar with the road. Mina, who had already received the news, was already waiting for Ryuichi in her little palace.

However, she did not have that set of fire control radar in her hands.

"Huh, that's not what I said!" Mina said, shaking her little head, "I told the elves that even if the fire control radar was in my hands, I wouldn't give it to them, because it belonged to my big brother!"

"Not with you...... Where is that?" asked Ryuichi strangely.

"In the hands of an idiot!"

"Idiot?"

The ocean is extremely vast, and the humans who stayed in the sea have become sea royals, who rule the endless ocean, each dominating a different sea. In addition to Boris, who was known to Ryuichi, there were six Sea Emperors located in different seas. Adjacent to the sea where Boris is located is a sea emperor named Bengde, and the fire control radar is in the hands of Bengde's son, Bengny.

The sea area ruled by Boris borders the White Dragon Empire, the most developed commercial country on the mainland, so Boris's country can obtain extremely rich supplies from the White Dragon Empire. Bengde's country, on the other hand, was a three-in-one, and if he wanted to get supplies, he had to buy them from Boris. The price of the same thing, bought from a human being, is completely different from that of Boris.

There was a war between the two countries, but it was all gone. So Beng De thought of another way, marriage. Although the kingdom of Bengde is not very developed, the sea area is extremely vast, and it can be regarded as one of the best in the entire seven seas, and in a sense, it can be regarded as strong. Boris is also not against marriage.

However, this qiē depends on Mina's meaning.

And Mina's meaning is clear.

Don't!

Xiao Mina has the beauty and cuteness that is absolutely outstanding among the sea clans, and her magic strength is very high. Although there is a little temper, it is definitely not bad. There will be no one who doesn't like such a little princess, and Benny is no exception.

Benny launched a fierce offensive against Mina, but unfortunately Mina didn't look down on him at all.

Later, Benny couldn't help it, and he asked Mina directly, "What is wrong with me?

So Mina told him, "You're too weak." ”

In fact, the Sea Emperor used to be human, and even when they came to the bottom of the sea, they were still human. Over the years, the size of the Sea Imperial Clan has not changed at all.

And what Mina uses to compare must be Ryuichi, whether it is height or muscles, how can Bengni, who is pampered as a prince, grow into a big man like Ryuichi?

This answer is unacceptable to Benny. So he set out to find out who Mina liked. The result ended up pointing to one person.

Ryuichi.

After learning about Ryuichi's resume, Benny couldn't help but scoff. A mere human being, even if it is prosperous on land, what can it do when it reaches the bottom of the sea?

And it wasn't long before Benny's chance came. He stumbles upon something strangely crafted from the bottom of the sea, and when he casually brings it up, it catches Mina's attention. When Mina saw it, she immediately asked Benny for it. But Benny doesn't give it, but asks Mina to promise to be his girlfriend. How could the hard-nosed Mina agree?

Later, Benny made a condition that he would have a fair duel with Ryuichi. As long as Ryuichi can win in the end, this thing can give a Mina.

That's why Mina found Ryuichi through the Guò Sea Clan Embassy in an unknown way, and as for how the elves knew, no one knew.

"It turns out that it's just a fight. Long smiled, if it is used to enlighten elementary school students, Long Yi is not good at all. But if it's just a fight, it's not too easy!

"That's it! Brother Long beat him to the ground! his nose and face were swollen! Educate him ruthlessly!" Mina said with a wave of her little fist.

When the Sea Emperor Boris saw the dragon appear, he had no idea what was going on. When he listened to Mina's description, he couldn't help but smile bitterly. Mina, a little fool, completely complicates simple things. In fact, fire control radar and that kind of thing are of no use at the bottom of the sea, and no one knows them, as long as Boris says it, Beng De will definitely send it honestly. But Mina's self-assertive behavior directly complicates the problem.

"Actually, it's not a big problem, is it? "Long Yi didn't feel how strict things were.

"Fight 'one'?" Boris laughed.

"It won't be many, right?" Ryuichi pouted.

"Hey...... Child, there is only one rule in the sea, and that is victory. Unlike the terrestrial people, who are bound by law and morality, the Sea Tribes use their strength to resolve disputes. Once you've won once, you'll have more and stronger challenges waiting for you until you lose. ”

"Wait, that's not fair, isn't it? I'm alone. ”

"Who told you that this is a fair duel? He just said that he wants to duel you, you may not even be able to touch him, even if he sends an army to duel you, you can't say anything!"

"Oh my God, that's too bad, isn't it?" Ryuichi couldn't understand. (To be continued......)