Taking advantage of the following time, Longyi proposed two solutions for air-cooling and water-cooling for this new machine. Air-cooling is simpler, and although water-cooling is better, it may not be possible due to material technology issues.

Finally, Long Yi decided to solve this problem by increasing the heat dissipation fins and adding a large fan.

When Long Yi proposed the word fan, everyone was puzzled. They thought Long Yi wanted to add a shaking iron plate left and right. But when Long Yi drew the shape of the fan, everyone was stunned.

"Can this thing emit wind?"

Angid asked with Morton.

"Yes, of course!" Long Yi still has this confidence in his fan that has been blowing for so many years.

There has never been a fan blade of this shape in the world. As a giant, Long Yi is almost afraid of the cold and heat, and never thought about the fan. Now that he suddenly found a fan blade, everyone was immediately frightened.

Long Yi made a simple three-leaf fan with cardboard. When the fan blades rotated to generate air volume, everyone was stunned.

That's OK!?

The dwarves dug the buildings in caves, and of course they also have ventilation systems, but they use passive ventilation through natural air circulation rather than active ventilation. As for humans, no one has ever thought of this!

So, the new technology tree was lit up, and Angid and Morton each thought about it.

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

Hahaha! I am indeed a genius!

The tractor problem is not a big problem, it is just a cooling system. In less than two days, the problem has been basically solved. As for the problem of the Woye Federation, it is not something Long Yi can control. After all, it will take some time to test the tractor before it can be used on the road. In any case, spring plowing will definitely not be able to catch up. However, if the progress is fast enough, it may be possible to catch up with summer plowing.

The Woye Federation is located in the south as a whole, with fertile soil, abundant rainfall and proper lighting. It can almost cultivate food for all seasons a year. Therefore, Long Yi doesn't have to worry that his tractor has no use. At the same time, the Woye Federation has also received relevant information. After learning that the tractor cannot be used in a short period of time, the messengers were disappointed. However, after hearing Long Yi's statement that maybe the summer farm could be used, they became excited again. After all, this time, Long Yi personally guaranteed it.

After solving the agricultural problem, Long Yi came to the elf shop to Yaozhiyin. Here, the twin elf sisters were waiting for Long Yi to appear.

"I'm here, what's the matter?" Long Yi asked quite neatly when talking to the elf.

"The Queen asked me to notify Lord Long Yi, you are requested by Lord Silver Dragon. Lord Silver Dragon has an extremely important item lost in the ocean. It seems to have reappeared in recent times. She asked you to help find that thing." The elf sister said at the same time, with a harmonious effect.

“What exactly is it?”

"Fire Control Radar."

Damn! Even the fire control radar was lost? This was disintegrated in the air, right? This was definitely disintegrated in the air, right? How could it still be so lively after it disintegrated?

"Okay, where was it left?" Long Yi asked helplessly.

"The fire control radar has been salvaged by the sea clan. But the sea clan princess refused to return it. She said that all the strange things salvaged in the sea belong to her eldest brother Long Yi. We guess that the brother Long Yi in her mouth should be you, so we asked you for help." The elf said.

Okay, it turned out that after a long circle, the elves and the sea tribe were in the same situation!

"It just so happened that the Princess of the Sea has contacted me, I'll find a way to do this!" Long Yi said.

"Okay, we will wait for your news here. If the sea tribe refuses to return Lord Silver Dragon's things to us, then we can only have a war!" The elf's eyes were cold and his language was serious.

Long nodded and signaled that he understood. He did not doubt that these elves did what they said. When Long left, the two elves looked at each other: "Do you think Lord Long Yi understands that we are kidding?"

"Our expression is very obvious. With the strength of Lord Long Yi, he must have seen it immediately."

"I think so too. In order to communicate more perfectly with Lord Long Yi, we must practice more."

Long Yi had no idea what was going on behind him at this time, but summoned Xiao You to rush straight to the beach. Nearly one-third of the White Dragon Empire's borders were coastlines, and there were embassies set up by the sea tribes among the three coastal cities. Long ran to the embassy where the news came from. The embassy had already prepared a submarine. Within ten minutes, Long Yi had left the land and came to the dark underwater world.

With the experience of the last trip, Long Yi was familiar with the journey this time. Mina, who had already received the news, had already been waiting for Long Yi in her small palace.

However, she didn't have that fire control radar in her hand.

"Huh? That's not what I said!" Mina shook her little head and said, "I told the elves at that time that even if the fire-controlled radar is in my hands, I will not give it to them, because it belongs to my eldest brother Long Yi!"

"It's not your place...where is that?" Long Yi asked strangely.

"In the hands of an idiot!"

"idiot?"

The ocean surface is actively vast. The humans who stayed in the sea then became the sea royal family. They ruled the endless ocean and dominated different sea areas. In addition to Boris, which Long Yi knew, there were six sea emperors located in different sea areas. Adjacent to the sea area where Boris was located was a sea emperor named Bengde, and the fire-controlled radar was in the hands of Bengde's son, Bengde.

Because the seas ruled by Boris bordered the White Dragon Empire, the most developed commercial country on the mainland, Boris' country was able to obtain extremely abundant supplies from the White Dragon Empire. However, the country of Bent is a three-no-touch country. If he wants to obtain supplies, he has to buy it from Boris. The same thing, bought from humans, is completely different from buying from Boris's hands.

There was a war between the two countries, but in the end there was no further information. So Bengde thought of another way, marriage. Although Bengde's kingdom was not very developed, the sea area was extremely vast and could be regarded as one of the top among the seven seas. In a sense, it was also very strong. Boris did not object to marriage.

But it all depends on what Mina means.

And Mina's meaning is very clear.

Don't think about it!

Xiao Mina has the beauty and cuteness that is absolutely outstanding among the sea clan, and has a high magical power. Although she has a little temper, she is definitely not bad. Such a little princess will not be disliked by anyone, and Bunni is no exception.

Bunni launched a fierce attack on Mina, but unfortunately Mina didn't even look down on him.

Later, Bunni couldn't help it anymore, and he asked Mina directly: "What's wrong with me? Can you tell me directly?"

So Mina told him: "You are too weak."

In fact, the Sea Royal Family was once a human being, and even when they came to the bottom of the sea, they were also human beings. Over the years, the size of the Sea Royal Family has not changed at all.

What Mina used to compare must be Long Yi. Whether it is height or muscle, how could Bunni, who is pampered as a prince, grow into a big guy like Long Yi?

This answer was absolutely unacceptable to Bunni. So he began to investigate who Mina liked. The result was eventually pointed to someone.

Long Yi.

After learning about Long Yi's resume, Bengni couldn't help but sneer. Even if a mere human is prosperous on land, what can he do when he reaches the bottom of the sea?

Not long after, Bunni's opportunity came. He accidentally found something strangely crafted from the bottom of the sea. When he mentioned this matter casually, it attracted Mina's attention. When Mina saw the thing, she immediately asked Bunni for it. But Bunni did not give it to him, but asked Mina to agree to be his girlfriend. How could the tough Mina agree? So both sides persevered.

Later, Bunni proposed a condition that he wanted to have a fair duel with Long Yi. As long as Long Yi can win in the end, this thing can be given Mina.

So Mina then found Long Yi through the Sea Embassy. As for how the elves knew, no one knew it.

"So it's just a fight." Long Yi smiled. If it was used to enlighten elementary school students, Long Yi was not good at all. But if it was just a fight, it wouldn't be too easy!

"That's it! Brother Long beat him up and down! His nose and face are swollen! He educated him hard!" Mina said, waving her fists.

When the sea emperor Boris saw the dragon appear, he had no idea what was going on. After listening to Mina's description, he couldn't help but smile bitterly. Mina, a little idiot, she completely complicated simple things. In fact, the fire-controlled radar is of no use at the bottom of the sea, and no one knows it. As long as Boris says, Bent will definitely send it honestly. But Mina's own behavior directly leads to the complication of the problem.

"Actually, isn't the problem? It's just a fight." Long Yi didn't feel how serious the matter was.

"Go to a 'one' game?" Boris smiled.

"It won't be many things, right?" Long Yi curled his lips.

"Hey... kid, there is only one rule in the sea, that is victory. Unlike the land people who are bound by law and morality, the sea tribes resolve disputes through strength. Once you win once, what will await you will be more and stronger challenges until you lose."

"Wait, isn't this fair? I have only one person."

"Who told you that this is a fair duel? He just said he wanted to fight you, and you might not even be able to meet him. Even if he sent an army to duel with you, you wouldn't be able to say anything!"
Chapter completed!