I just returned to Konoha and found that all my clan members were gone.

The practice of immortal magic cannot be completed in a short period of time. Ye Lan would return to Yuyin from time to time to observe the progress of the village.

The promotion of the car went more smoothly than he had imagined. Yuyin's steel mills gradually began to produce. Xiaonan felt a little confused as he saw that money was flowing into his pocket without any effort.

Suddenly I felt that the bounty missions Xiao was doing were a waste of time. However, the money came quickly and was spent quickly. At Ye Lan's suggestion, the money earned was transferred to other departments in a big way. The originally lifeless village became lively.

Even though the perennial rainy weather had not changed, there were more and more pedestrians on the streets.

In the newly built medical department of Yuyin, Ye Lan met Karin, who was newly recruited by Sasuke.

"From the Uzumaki clan? Do you know some medical ninjutsu?"

This kind of bright red hair color is rare, and combined with Sasuke's description, Ye Lan recognized the other person's background at a glance.

"That's right, but I didn't expect that the one controlling Yuyin was Akatsuki."

Karin knew it was too late to regret now. Now that she knew Akatsuki's secret, she could no longer leave unless she died.

"Are you nervous?"

Although his cultivation of immortal arts has not made any further progress, his control over natural energy has indeed improved a lot. Now Ye Lan can already feel the emotions of others through the fluctuations of natural energy in the air.

Karin was stunned. She didn't expect that this guy in front of her, who had a reputation of being even more brutal than Orochimaru, could sense her emotions. If it weren't for the other party's two red Sharingans staring at her, she would have thought that Ye Lan also had the Kagura Mind Eye.

"I heard Sasuke say that you joined this organization on your own initiative. You don't have to be so defensive. Apart from not being too visible, the treatment in our organization is actually pretty good."

Ye Lan eased the tense atmosphere, and Karin also relaxed a lot after hearing that.

"Don't worry, Lord Ye Lan, I have considered it carefully when joining the organization, and I will definitely be loyal to the organization."

Karin said this confidently without blushing or getting nervous.

"You are loyal to Sasuke."

When he came back, Ye Lan noticed that Karin's eyes were not right when she looked at Sasuke, and her gaze towards Sasuke was almost tearing. This was why Ye Lan felt a little relieved about her, otherwise he would have suspected that she was an undercover sent by Orochimaru.

"Oh, no, I joined because I admired Akatsuki!"

Karin looked a little unnatural, and Ye Lan waved his hand nonchalantly.

"No need to say more high-sounding words. Now that you have joined, just do your job well. You know medical ninjutsu, so you can work in the medical department and teach these interns."

"Actually, I can go out on missions. I'm more confident in my perception than in medical ninjutsu."

If she stays in the medical department, she will have less time to spend with Sasuke. Karin didn't join Akatsuki for this kind of thing.

"You should know that Sasuke left Konoha because of me."

Not knowing why Ye Lan suddenly brought up this matter, Karin nodded.

"In other words, I still need to worry about Sasuke's future affairs, such as marriage and having children..."

The inexperienced Karin blushed when she heard this. This kind of thing was too far away for her, but if the target was Sasuke...

"Ahem, it's okay to stay in the medical department, right?"

After taking a look at Karin Ye Lan who looked like a nympho, she coughed.

"I'll join the medical department right away!"

After waking up in shock, Karin immediately bowed to Ye Lan. What Ye Lan said was right. The person Sasuke cares about most now is Ye Lan. If he can establish a good relationship with Ye Lan, then conquering Sasuke will be just a matter of time.

After sending Karin away, Ye Lan became even more certain that this child was definitely not an undercover agent sent by Orochimaru. Karin's personality was too easy to manipulate. If she was just pretending, then Ye Lan's recent practice of immortal arts would have been in vain.

Leaving the medical department, we headed to Yuyin’s newly built R&D department, which was the highlight.

Ye Lan thought about making guns, but the world already had a prototype of it, but its power was hard to describe, so he didn't develop it further. Gunpowder was a rare material, and he really didn't have the capital to research and develop it, so he gave up the idea.

But this time, Sasuke brought the Akutagawa family and it rekindled his interest.

Inside the R&D department, a weapon called the Chakra Cannon was placed on an open space, and Scorpion of the Red Sand was standing by, looking at this novel thing.

The original batteries were replaced by ninjas. The ninjas of Yuyin all wore some kind of instrument on their heads, which transmitted chakra to the cannon continuously through transmission tubes.

As the chakra continued to gather, the light from the muzzle became brighter and brighter, and finally it reached a certain critical point and fired instantly.

The R&D department's site seemed to be blown by a gust of wind, and the power of the fired shells was no less than that of an S-level escape technique, destroying all targets in front of it with ease.

Until the light of the cannonball completely dissipated, the recorder in the distance raised his hand and shouted, "The ninth test of the Chakra Cannon, distance 121 meters!"

Upon hearing this distance, Akutagawa and his son both smiled, obviously they were satisfied with the result.

"It took too long to condense. Although the distance has reached more than 100 meters, it is still not enough."

Scorpion came to Ye Lan's side at some point and whispered.

"Is there any way to increase the distance?"

Ye Lan was not surprised by the appearance of Scorpion. You know, although there is no such thing as a director in the R&D department now, Scorpion has been here the longest, and his words sometimes carry more weight than Ye Lan's.

"There must be a way. If we double the size of this thing, the range will be about 200 meters. If we double it, the range will be about 300 meters. But the materials and manpower required will not be enough to make much even if Yuyin spent all its money."

And there is one thing Scorpion didn't mention, which is that the further you expand, the smaller the improvement you can get. The current power is barely enough, but the attack distance is the most important.

You know, the most classic saying about cannons is, what is the range of cannons used for? It is used to measure the area of ​​land!

Therefore, if you want to unleash the power of the chakra cannon, you have to start with the distance.

"Scorpion, I remember that your puppet only needs a little chakra to control. There should be some chakra conversion stuff in it."

"That's right, but the puppet itself is not a big thing. It doesn't require a lot of chakra to control it. You mean..."

For the first time, Scorpion looked at Ye Lan in shock. This man’s ideas were too weird. From the weapon in front of him, he could think of the puppet he was using.

"You can try to install this thing inside the cannon first. Another point is that although the range is important, other aspects should also be considered. With this device, you can try to make the chakra cannon easier to carry and gather energy in a shorter time."

"Even if the range is only 60 to 70 meters, with hundreds of these chakra cannons, it will be difficult for us to break through from the front."

Ye Lan's thoughts made Scorpion's somewhat dead heart become active. His eyes lit up. He had already felt the effect of this weapon from Ye Lan's description.

"Once developed, this thing will change the way wars are fought. Uchiha Ye Lan, you are indeed an interesting person."

Scorpion had felt a little tired after years of research on puppets, but after coming to the R&D department, his mood became a little better. Now that he had found a direction, his mind began to become active again.