Although Yichen behaved strangely in the school, there was not much turmoil. However, there was something unexpected about the peaceful work of the enchantment class in Yichen's imagination.

It turns out that Yichen has aroused everyone's curiosity in the enchantment class, although he has been busy with work recently, there are still many people who find various excuses to deliberately come to the data room to see Yichen, and even many people specially pick Yichen's time on duty to exchange books. So half of the quiet study time that Yichen thought was occupied by copying books.

However, there are also benefits, after such a fuss, Yichen quickly became familiar with the internal structure of the enchantment class and the division of various tasks.

As one of the several standing departments of the village, the structure of the enchantment class is very large. Yichen's sealing detachment, plus the perception detachment, the rune detachment, plus a combat detachment that does not belong to the enchantment class but has been stationed in the enchantment class for a long time.

In addition to the combat detachments, each detachment ranged from several dozen to several hundred in peacetime. It is the same level of organization as the medical class, the interrogation class, the dark department, the ninja school, the patrol class, the government affairs department, the logistics department, etc. Unlike Konoha, Iwa Shinobi Village has no roots and no dedicated guard department.

It's just that as soon as the time of war arrives, these departments will be split up and assigned to various combat units in order to improve the allocation of various special personnel in combat units. Therefore, the current enchantment class is not as large as the hundreds of people when it was full, only more than a hundred people remained, and these more than 100 people were divided into three groups for shifts. Among them, the perception class has the most people, and the sealing class and rune class have many fewer people.

The daily work of the sealing team includes two major aspects, one is to regularly check the condition of each seal in the village, similar to the cabinets in the reference room that can only be accessed with special permissions, and the sealing team must regularly check and reinforce. Another key task that Yichen did not think of, that is, the production of storage scrolls.

Storage scrolls are consumables, and although they are not discarded after one use, they cannot be used for a long time, and they are expensive, so there are ninjas in every village who are responsible for making them. And an important job of the rune class is to make all kinds of rune paper, such as the most common detonation charms.

Until now, Yichen has not used these two things, for no other reason, he can't afford to use them.

At the top of the book list given to Yichen by the captain of the branch temple is the knowledge about the making of storage scrolls.

In the next month, Yichen copied more than 30 books, although he was a little tired, but it also brought him about 70 contribution points. Although it is not much, as a poor household hovering on the food and clothing line, Yichen is still happy in his heart.

An obvious benefit of strong mental power is that it is easy to learn knowledge, so Yichen finished reading the books on the book list in a month, which also caused a burst of surprise in the temple.

The branch temple first tested Yichen's knowledge mastery, and the results were satisfactory, Yichen not only understood the relevant knowledge, but also had a lot of insights. This was a little different from what was expected, and after thinking about it, the branch temple did not arrange Yichen's other tasks according to the normal situation, but made a longer list of books for Yichen to study.

Yichen is not in a hurry, he has been practicing the three-body technique these days, and the progress is quite gratifying, and he has now learned both the doppelganger technique and the stand-in technique. However, it is not yet proficient, the process of casting the spell is slow, the success rate is not high, and it must be performed with full concentration.

The main thing is that the seal is too slow, and it is far from being able to be used in one-on-one battles. Transformation and doppelganger techniques take more than three seconds, and if you prepare a stand-in wood in advance, you can also perform it in more than three seconds, and if you temporarily use surrounding items as a stand-in wood, it will take more than seven seconds. In more than seven seconds, Taniya's Senben was able to beat Yichen into a cactus.

In view of this, in addition to physical training, Yichen's daily training focused on familiarity with the three-body technique.

The practice of the three-body technique is divided into two parts, one is the seal practice, as one of the few ninjutsu that Yichen currently knows, the feeling of practicing the seal with actual use is much better than just shuffling the order and practicing the seal. And now that the seal is accompanied by the transfer of chakra, Yichen does not dare to rashly try to disrupt the order.

After thinking about it, Yichen chose the most suitable ninjutsu for actual combat, the stand-in technique. As one of the primary three-body techniques, the stand-in technique consumes very little chakra and is a common way for ninjas to dodge attacks.

However, there are many restrictions on how to perform the stand-in technique, and first of all, you need to have an object of the right size and weight around. If it's too big or heavy, the stand-in will be slow to perform and consume more chakra, so it's better to use the teleportation. If the weight or volume is too small, it will be difficult to transform the avatar into a body.

Secondly, the stand-in technique needs to connect its own chakra to the stand-in item, which makes the preparation time for this ninjutsu not too advanced. If you prepare early, you can't fight at all in order to maintain chakra contact. If it's late, hehe, it's cold directly.

In the end, Chakra is easy to perceive out of the body, the ninja's IQ and combat instinct are not bad, and the stand-in technique, as one of the most common ninjutsu in circulation, everyone is on guard, and it is actually difficult to achieve unexpected results.

But although there are so many shortcomings, the advantages are also obvious. The most straightforward thing is that it is easy to learn. The three body techniques are all entry-level ninjutsu, and if you divide the level, it is D-level ninjutsu. There is no easier ninjutsu.

In the days that followed, Yichen changed places every day, practicing his stand-in skills in a variety of different environments. Until three months later, Yichen was able to achieve 100% success in performing the stand-in technique under normal circumstances, and was able to ensure that the entire process was completed in about five seconds using the surrounding wood or branches.

Then Yichen began to have a whim, not using wood, using some items that ordinary people can't think of to perform stand-in techniques, such as water. Compared to stone, water is less dense and consumes much less chakra. And, most importantly, unexpected. Avatar is able to swap the positions of the ninja and the stand-in items, which allows the ninja to replace themselves into the water, which is a good way to escape or hide.

It has been about five months since Yichen's chakra amount first met the requirements of the transformation technique, and Yichen's chakra amount has also increased a lot compared to the beginning. For the sake of calculation, Yichen refers to the amount of chakra that can be used to perform a D-rank ninjutsu as 1D. Now Yichen has risen from 1D to about 1.7D.

In addition, due to the practice of chakra control during this time, Yichen has been able to perform the stand-in technique with a chakra of about 0.8D. But this is limited to the stand-in technique, and the proficiency of the doppelganger and transformation technique has not changed much, and the amount of chakra required is still above 0.9D.

In addition, Yichen's greatest advantage mental power also began to slowly increase, and the most obvious thing was that he became the only ninja in the class who could improve chakra while fighting.

Yichen, who is more than five years old and less than six years old, has barely reached the standard of the peaceful era and the selection of Konoha Shinobi. In the memory of his previous life, Kadian graduated at the age of five, and Yichen said that if I came, I would do it too. To describe Yichen's mentality in one sentence, that is: Erzhuzi said, I can do it again.

Of course, these are Yichen's self-absorption, in order to give himself a little confidence, Ka Dian's graduation at the age of five is a mandatory graduation, and the difficulty of the assessment is definitely more than the assessment of the three-body technique. Moreover, Yichen was able to meet the standard in the three-body technique, which was entirely due to Chakra's control ability. Chakra volume, physical fitness and other conditions are far inferior to other leaders in the same age.

For example, Shinohara, a muscular and simple-minded guy, now has a chakra amount of at least 7D or more, and his physical fitness is dozens of times that of Yichen. Don't be surprised, in fact, the gap between the physical fitness of the two is widening.

This kind of physical fitness gap is desperate, and it is manifested in physical skills, that is, if Yichen and Tian Nai fight, the two of them will finish the seal of opposite, and then before Yichen can unfold it, Tian Nai's fist will be in front of him.

However, although Shinohara and Tian Nai's physical skills far surpassed Yichen, Shinohara was still in the stage of practicing the three-body technique, and so far, he still has not been able to successfully perform the three-body technique. Tian Nai is better, and he is already able to perform the transformation technique. Now there are seven or eight people in Yichen's class who can perform the three-body technique, but there are still only three people who have learned all three ninjutsu, Yicang, Yichen and Stygian, and Yichen has learned three ninjutsu before the Stygian Optical Society.

What is the strength of Ikura, now the classmates in the class can no longer judge. The physical fitness is far beyond others, the amount of chakra, and the control of chakra are not comparable to ordinary people, and when competing with classmates, there is no one who can make Ikura exert all his strength. He is a well-known genius in the village.

Sometimes Yichen wonders, according to the talent shown by Ikura, he is actually not much worse than Kakashi, why is there no such person in his memory? Did you die young? Or is it a waste?

This is not something that I can figure out now, and I don't waste my mind anymore, but spend my time on stand-in techniques.

How do you use water as a stand-in? Water has no fixed form and is extremely fluid, both of which greatly limit the use of stand-ins.

After thinking about it, Yichen decided to solve the morphological problem first, practice with the water in the bucket first, so that the influence of the flow can be ruled out, and if feasible, move on to the next step.

But the idea is beautiful, but the reality is cruel. Yichen deliberately chose a bucket about the size of a stand-in wood, filled it with water, and began to use the chakra to establish a connection with the water in the bucket.

This step is no problem, but there is a problem when changing positions with water, and Yichen can realize the two positions. After the spell was completed, Yichen successfully came to the bucket, and the water also came to Yichen's location. But the water that has been relocated cannot be turned into dust.

Was this considered a success?

According to the original intention of the stand-in technique, it should be successful in dodging attacks. However, the essence of the stand-in technique is to confuse the enemy for a short time when dodging attacks, and in this respect, it is a failure.

An important advantage of the stand-in technique is to launch a surprise attack from the side while the enemy's attention is on the stand-in. To achieve this, we have to solve the problem of the shape of the water.