The sun that was about to set cast a thick yellow light into the house.

In the Hokage's office, light and shadow are intertwined, and Araki Shinya stands at the bottom, just at the junction of light and shadow.

"Sprouts, you've overdone it this time." The three generations of Hokage looked at Araki and had a headache. How did this guy do this on the first day of class? Fortunately, although there were some accidents, no one was injured in the end.

"It's just a test of their strength to see if they're worth teaching me." Araki is still so calm in the face of three generations.

"It is a very serious mistake to attack a colleague and conduct a drill without any notice and thorough preparation. Your colleagues have a lot of opinions about you. Fortunately, this time Aoyagi handled it properly and no one was injured. If something goes wrong with a student, you can't continue to be a teacher. With his elbows propped up on the table and the ten fingers of his palms interlocked, placed on his chin, the Hokage stared sternly and warned Araki.

"Hokage-sama, this time it was really my negligence! If something goes wrong, I'll take responsibility. However, if you want to become a ninja, you must be prepared to die at any time, and as students of the ninja school, they should have this awareness. Appropriate danger is conducive to their growth. "Araki is neither humble nor arrogant, and he is unwilling to believe that what he is doing is wrong.

"Sprouts, it's not a time of war now, and the students of the ninja school don't need to face the battle so quickly. Not to mention, Aoyagi is just a child who has just entered school, and they don't have enough self-protection and self-control ability. It's better to let them grow up slowly, and then get in touch with these. Hokage paused and continued, "Although you have autonomy in teaching, there are some things that you can't be too casual. You have to be careful to take precautions when conducting these courses. If one person is too busy, you can submit a lesson plan and teach with several teachers. ”

Still worried about what kind of accident Araki would cause, Miyo thought for a moment and said, "Xinya, you have retired from the shadows. Students, after all, are different from subordinates. Give more love to students. Proper wind and rain can make trees grow stronger, but the first seedlings cannot withstand strong wind and rain. ”

"Hey!"

"In case you don't do anything else, Sugi will help you teach this month." The Hokage looked at Araki with some reluctance, and added, "It's not that you don't want to teach lessons like Konoha history, Sugimoto is very good at these." He is in charge of the knowledge and theory teaching part, and you are in charge of the practical part. ”

"Hey!"

"As for the punishment, after one year, your money will be suspended."

"It's nothing, you can step down." Hokage waved his hand. After Araki left in an instant, the three Hokages walked to the window, put their hands behind their backs, and quietly looked at Konoha Village.

The maple trees scattered around the village or gathered into a forest began to dye the tips of their leaves red. Reflecting the afterglow of the setting sun, the red tips of the maple leaves swaying in the wind resemble a tiny flame that has just been burned, beating and emitting a faint halo.

Autumn came again, and the trees grew a year old, but the seedlings also grew a year old. The passage of time is a pity for the elderly, but for children, it is a joy of growth. When will a tree grow from the seedlings?

………………

Lifting the quilt, Aoyagi wakes up in the afterglow of the sun. After cooking something to fill his stomach, Aoyagi pondered what he was going to do tonight.

Well, I have enough physical exercise today, so let's learn knowledge.

Under the cover of night, Aoyagi entered the basement with a candle and a flashlight.

Considering the problems discovered today, Aoyagi focused on finding ways to increase his strength and speed, or techniques that could hinder his pursuers.

Rummaging through it, Aoyagi accidentally rubbed open the surface of the bookshelf partition next to it as he moved a large scroll. Removing the scroll, Aoyagi looked at it, and removed the surface of the partition, and there was a small dark compartment inside. Inside the compartment is a small scroll. After Aoyagi unfolded it, it was a cursory glance, and it was actually a secret technique to enhance physical fitness.

It was a surprise to find this secret art, and Aoyagi stopped looking at the other scrolls, and went back to the bedroom with the secret art scroll.

Sitting at his desk, Aoyagi opened the scroll and read it several times.

Don't look at this scroll, but there is a lot of content in it, and the small characters are densely covered in every place on the scroll, and it is very difficult to read.

The first half of the scroll talks about the secret art of strengthening the physical fitness, and the second half of the scroll talks about the secret art of strengthening the spirit. Chakra is made up of physical energy and mental energy, and enhancing both means that the amount of chakra will also increase. This is a cultivation secret technique that strengthens the foundation, and its preciousness is immeasurable.

Aoyagi has a sense of unreality being smashed by a golden pie. When did your luck get so good?

After studying the scrolls, Aoyagi summarized the key points of the cultivation of the two secret arts.

(Aoyagi decided that the secret technique of enhancing physical fitness is called a body strengthening technique.) The secret technique of raising the spirit is called the refreshment technique. It's low, but it's appropriate. ）

The technique relies on a special way to change the nature of the chakra, and then emit the chakra with special properties in the body, flushing and nourishing the body, and slowly improving the physical fitness. However, the effect of this secret technique is relatively strong when it is young, and it requires long-term cultivation to show its effect, which belongs to the type that takes a long time and takes a long time to take effect.

The Mind Booster is somewhat similar to the Body Strengthening Technique, but the difference is that it changes the nature of the chakra in another way, and then emits the chakra in the brain, which in turn strengthens the brain so that it can produce stronger spiritual energy.

Essentially, they are both strengthening cells, but the direction of strengthening is not the same.

According to the nature described in the scroll (the body strengthening technique uses chakra, which is rich in life force, and there is a feeling of warmth; Aoyagi feels that the body strengthening technique is like using the Yang Chakra, and the Refreshing Technique uses the Yin Chakra.

Based on his own situation, Aoyagi decided to practice the body strengthening technique first. Sitting cross-legged on the bed, Aoyagi extracted the chakra and worked hard to change the nature of the chakra according to the method inside the scroll, turning it into a life force.

I tried hard more than ten times, and each time I practiced until the chakra dissipated on its own, but there was no progress at all. Aoyagi can easily move the chakra, but it is difficult to change its own nature, it feels like the chakra is separated by a membrane, and it can be kneaded into various shapes and transported around, but it is difficult to break through this membrane to change the chakra itself.

It's really hard to change the nature. This secret technique needs to be practiced at a young age to achieve the best effect. However, the child's control over the chakra is not high, and it is difficult to practice. The actual value of this secret technique is not so high.

Aoyagi tried the refreshment technique again, and without surprise, it was still difficult to change the nature of the chakra.

Going back to the original book, Naruto also practiced climbing trees and treading water for several years before he practiced the change of chakra's nature. This is already considered an advanced technique.

Chakra nature changes, but it can greatly increase the power of related escape techniques, and it can also use the chakra with changed nature to carry out direct attacks (such as the chakra with the change of wind nature attached to the ninja to enhance the cutting power, etc.), or enhance the power of the ball.

Since it is difficult to practice for the time being, and it is necessary to rely on water grinding kung fu to improve his proficiency, Aoyagi no longer tries, but diverges his mind and thinks.

This secret technique has a great effect on practicing when you are young, because the child's cells are relatively small, and it is easier to transform? In other words, if I concentrate the chakra to flush the stem cells, then the cells that divide from the stem cells must also be strengthened and strong, right? If this assumption is true, then the speed of practicing this secret art will increase considerably.

All you need to do is concentrate on strengthening your stem cells and wait for them to divide into new cells. In this way, the first thing is that the workload is much less, after all, stem cells only account for a small number in the body. And the fewer cells that need to be strengthened, you can spend more chakras for strengthening, and each cell will be allocated more chakra, making the cell enhancement faster.

In general, targeted strengthening of stem cells is more efficient and effective.

In other words, if you practice as a child, you will have a greater chance of transforming into stem cells, which will affect the whole body, which is one of the reasons why the effect of practice in childhood is greater.

So here's the problem, Aoyagi has to be able to find stem cells first.

Aoyagi pinned his hopes on the space's ability to unlock data. After all, he studied biology in his previous life, and although he forgot a lot of content, he still remembered that he had taken courses such as histoembryonics, which should have described the location of stem cells.