The inner breath flows in the meridians.

The main meridians just gushed out and instantly divided into hundreds of connected secondary meridians. After flowing for another circle, tens of thousands of extremely small peripheral meridians distributed in the body are penetrated, and then they seeped out of the body surface, forming a high-frequency vibration state at the same time, covering the entire body surface.

A large amount of spatial energy was instantly attracted, and penetrated into the body through the surface of the body, and then flowed through tens of thousands of peripheral meridians along with the trajectory of internal breathing. Then a simple cycle was formed in the dantian and then flowed out.

The internal breath has been maintained, and the spatial energy has been maintained in this way and circulating and flowing outside and inside the body.

After maintaining this cycle for more than ten times, the inner breath suddenly moved and changed to another trajectory. The spatial energy attracted by the inner breath immediately changed to another trajectory, and the cycle formed in the dantian also changed to a slight change.

After continuing to maintain this cycle for more than ten times, the internal breath moved again...

...

Chu Nan let out a sigh of relief, stopped the internal breathing, and concentrated on thinking.

Whether it is what Anqi Beili said in person or the various materials he has read in library management, they all show the same truth.

If you want to break through the universe and heavenly barrier, you must first complete a complete spatial energy cycle in your body and be able to maintain it forever. In simple terms, it is to form an inner small universe in your body.

However, Chu Nan's inner breath became more and more deeply in his cultivation and his deeper understanding of space energy, the more he discovered a problem.

It is no problem to temporarily form the so-called inner microcosm. He can even make space energy form multiple complete circulation channels in the body at the same time. In layman's terms, multiple inner microcosm are formed at the same time.

But he couldn't keep it up.

At first, he felt that this was because his inner breath was not deep enough, but after practicing for a while, he found that this was not the main problem.

Because the existence of the inner microcosm maintains a fixed and stable spatial energy circulation channel, although it is related to the strength of the internal breath, it is not the most critical factor.

The most important factor is the problem of the structure of this space channel, that is, the inner microcosm itself.

To put it bluntly, each complete set of inner breath skills will provide a detailed plan for breaking through the key to building an inner small universe through the universe, helping warriors who practice this set of skills to build an inner small universe.

However, although there are some relevant descriptions in the set of Nine-Turn Heart Method left by Su Xuansheng, it is extremely vague and has very little reference significance.

What's more, with his powerful data ability, Chu Nan has already changed the Nine-Turn Mind Method to almost unrecognizable, completely beyond the scope of cultivation in the martial arts left by Su Xuansheng.

So even if he left behind such skills, Chu Nan could not apply it.

Now the method suitable for Chu Nan can only be explored by yourself.

Chu Nan thought for a while, picked up a book in his hand, and turned to the page he had just opened.

This records the detailed record of a warrior's own martial arts when he broke through the Zhouyu Tian Pass. Through this detailed record written by the warrior himself, similar to a diary, Chu Nan can clearly see some problems encountered by a warrior with his own martial arts when he broke through the Zhouyu Tian Pass, which gave him corresponding inspiration.

In this record, the warrior also encountered difficulties in martial arts when building an inner universe. The solution he adopted was to explore experiments bit by bit, and circulate the space energy continuously according to the internal fun trajectory of his own creation technique.

During this cycle, he found that the cycle gradually became fixed, and the inner small universe formed in the dantian eventually became stable from unstable and finally fixed. Then he naturally broke through the universe and became a warrior of breaking the air level.

Judging from this record, this warrior took a stupid approach, similar to a warrior in the domineering stage. Through persistent practice, he used his inner breath to slowly temper his body to achieve improvement.

However, he used space energy to further temper it, which gradually stabilized the inner universe and finally made it successful in breaking through.

What Chu Nan just made was an attempt based on the record he left behind.

Unlike this warrior, Chu Nan has powerful data ability and can clearly perceive any minor changes in his body, so he did not, like this warrior, must consistently follow a trajectory to maintain cultivation, and then slowly perceive the stable formation of the inner small universe.

Chu Nan only needs to run it once to find out whether it is effective through various changes in his body.

The experimental results show that this is indeed an effective way.

When Chu Nan tried for the first time, he operated completely according to the fifth level of the Nine Turns Mind Method.

After running for a week, I found that some changes did occur in the meridians in my body and near meridians, but these changes were extremely weak, even so weak that they almost didn't notice with his powerful data ability.

This result disappointed him very much.

Because if calculated based on this level of improvement, if you want to improve to the so-called inner small universe, you will need to go through a cycle of more than 100,000 cycles.

According to his current meridians and flesh body, he can only undergo up to thirty-six cycles of practice every day, which will take a full ten years to complete.

This method may be feasible, but Chu Nan would never accept it for such a long time.

So next he tried to use the fifth level of the Nine Turns Mind Method that he had improved, but it showed that this did not bring more improvement. Even when he mobilized all the meridians in his body at the same time, including the peripheral meridians, to suck more space energy, he found that the improvement brought by the several space channels generated at the same time was actually weaker than the beginning, which almost made him unable to sense it.

So he understood that the problem must not lie in the practice, but in other words.

After thinking for a while, Chu Nan picked up another book at hand.

This is not a note-taking material, but a purely research-oriented book. The title is "On the Deep Tempering of the Body after Breakthrough of the Body Level". The author signed is an unknown warrior. According to the introduction of the title page, it seems that he is an imperial warrior from the United States of Meletta. It is unknown who it is.

This is a very rare paper book in modern society. Each page also contains many reading notes and experiences left by future generations. It can be said to be a very precious material, which has exceeded the level of ordinary books.

If it weren't for the library of the Warrior Branch of the Nebula Academy, it would be absolutely difficult for Chu Nan to get into such a precious thing elsewhere.

Judging from this point of view alone, he is very grateful to Sun Xiangren.

Sun Xiangren not only told Chunan that there were a lot of materials that were beneficial to him in the library, but also gave him a special authority in advance so that he could enter the library at will and even borrow most of the materials at will.

For ordinary students, library materials are also divided into levels and need to be borrowed according to the level of students.

Judging from the information Chu Nan has seen now, he is now an e-level student who has just been upgraded and cannot get in touch with it.

Obviously, this was some compensation made by Sun Xiangren to Chu Nan, and Chu Nan accepted it honestly and unceremoniously.

"Well...after all, it's related to the body."

Chu Nan read through the book again and determined this conclusion.

After thinking for a while, his heart moved.
Chapter completed!