A wisp of inner breath rushes and surges in the meridians.

After running along a familiar route that has been run thousands of times for a week, when I re-entered the dantian, the strength of this internal breath increased by 0.141392% compared to when I just left the dantian, which was a negligible improvement.

However, such a tiny improvement was already more than twice as high as Chu Nan's previous cultivation of the Nine Transformations Mind Method in the past ten years.

This is because Chu Nan successfully broke through the Nine Turns Mind Method to the third level after his previous attempts to obtain the data ability, and naturally every time he cultivated the Nine Turns Mind Method, the increase in the strength of his internal breath was much greater.

And if he can break through the Nine Turns Mind Method to the fourth level, although it will not allow him to ascend to the sky in one step, directly break through the strength of a hegemon-level martial artist with internal breath, and become an internal breath-level martial artist in one fell swoop, but it will undoubtedly allow him to greatly increase the increase of internal breath every time he cultivates, and the increase speed of internal breath will naturally become faster.

What Chu Nan is doing now is to conduct an experiment on the Fourth and Ninth Mind Turning Method.

According to the information related to the Nine Turns of the Heart Method that Su Xuansheng publicly left back that year, the Nine Turns of the Heart Method from the first to the fifth level is actually just laying the foundation.

The third and fourth are not very different from the data alone.

And if you analyze the Nine Turns of the Heart Method in detail, you will find that in fact, the Nine Turns of the Heart Method is not much different from other ordinary internal breathing exercises on the surface, at least in the first few times.

Theoretically speaking, the first step of all internal breath exercises is for the martial artist to successfully sense the existence of internal breath in the body, and then learn to operate internal breath, and then follow the cultivation methods of different internal breath exercises. Movement of internal breath is amplified by different meridians. Thus increasing the internal interest.

Although there are many differences in the details of different internal breathing exercises. There are even some special exercises that will make the inner breath of the martial artist carry very special attributes and peculiarities, but in essence, they are all the same.

At this point, the Nine Turns of the Heart Method does not show anything too special.

The only thing that is different from other internal breath exercises is that it allows martial artists who cultivate it to use the nine turns of internal breath to greatly increase the instantaneous burst power of internal breath.

But this special feature will still be limited by the upper limit of the strength of the martial artist's meridians, and it is not unlimited.

Otherwise, Chu Nan is facing Maruk. It is completely possible to directly breathe nine turns, and the strength must be far superior to that of Maluk, a third-order inner breath level martial artist, not to mention knocking him away with one punch, it is easy to kill him with one punch.

However, after Chu Nan forcibly ran the five turns of internal breath at that time, a problem was discovered.

He had only been able to breathe five times, and he already felt that the strength of his inner breath was completely beyond the upper limit of his meridians.

If he turns his internal breath six times, I am afraid that all his meridians will be completely shattered and he will be killed on the spot.

If calculated in this way, the nine turns of internal breath are undoubtedly completely unimaginably terrifying, and the strength of the required meridian toughness will definitely exceed the limit of the human body's meridians.

Since that's the case. How to achieve the realm of "nine turns of internal breath and penetrating the heavens and the earth" that Su Xuansheng said?

That's impossible!

Chu Nan shook his head and gave up thinking about this question, which was still very far away from him. Refocus your attention on the difference between the third and fourth levels of the Nine Turns of Mind.

Putting aside all other factors, if you just look at it simply, in fact, the difference between the third and fourth levels of the Nine Turns of Mind Method, that is, the fourth level needs to mobilize a lot more meridians than the third level.

But just a few more meridians that need to be operated by internal breath are already an extremely insurmountable obstacle for countless martial artists.

First of all, having some more meridians for internal breathing means that these meridians must be opened.

The meridians of the human body are not all smooth at the beginning, and they can be allowed to operate with internal breath.

The process of opening up the meridians is actually an important process of cultivating internal breath and refining the body and body.

Secondly, opening up these meridians and allowing the internal breath to operate within these meridians does not mean that you can rest assured.

Unlike the meridians that have been opened up and have been running for countless days for countless days, these meridians that have not been opened up before are much inferior in toughness and strength, and if they suddenly rush into them with the same strong internal breath, it will cause a very big burden on these meridians, and even directly lead to damage to the meridians.

Don't say that it is good to be able to improve your internal breath without getting hurt.

However, this is not a problem for Chu Nan.

The Nine Turns of the Heart Method can cause a special increase in the intensity of internal breath, and it is not difficult to open up the meridians.

As for the damaged meridians...... Where would Chu Nan be afraid of these now.

So he just carefully read the materials of the fourth level of the Nine Turns of Mind Method a few times, and he had basically decided on the plan.

In order to successfully break through to the fourth level of the Nine Turns of the Heart Method, according to the data map of the meridians of the human body left by Su Xuansheng, Chu Nan needs to open up seven main meridians and twenty-six secondary meridians around the main meridians.

As for the other small meridians, Su Xuansheng did not clearly mark them, but said that if he could, he would open up as many as possible, which would be more beneficial to improve the operation of internal breath.

Chu Nan pondered carefully for a while and decided to start with the meridian farthest away from the dantian first.

As soon as his mind moved, a stream of internal breath was quickly mobilized into the main meridian closest to this meridian, and then carefully flowed into it under Chu Nan's control.

The intensity of this internal interest is not high, and after three attempts, not to mention opening up this meridian, and even successfully entering this meridian to operate smoothly.

So Chu Nan then changed a little bit to a slightly stronger internal breath.

With the help of powerful data capabilities, the intensity of this internal interest was controlled by Chu Nan extremely accurately, and the intensity was only increased by 1%.

After three consecutive attempts, he still couldn't enter this meridian.

So Chu Nan strengthened another 1%.

Three more attempts......

……

Finally, after the twelfth attempt, the strength of the internal breath increased by a full 12% compared to the initial one, and this internal breath finally broke through the barrier between the two meridians, and successfully poured into the main meridian that needed to be opened by the fourth level of the Nine Turns of the Heart Method.

As soon as Nei Xi entered this meridian, Chu Nan immediately felt as if Nei Xi had suddenly stepped from a wide and flat Yangguan Avenue into a muddy path, and the journey was extremely difficult.

If it weren't for Chu Nan's psychological preparation, his control of the internal interest was extremely accurate, and it might even be possible for this internal interest to go out of control directly.

However, even though it did not get out of control, this internal breath staggered forward with great difficulty in this meridian, but it was also constantly consumed and weakened little by little.

Before this meridian was completely completed, this internal interest had been completely exhausted.

Chu Nan thought for a moment, and once again pulled out a breath of internal breath from the dantian.

The strength of this internal interest did not increase compared to just now, but it was deliberately controlled by Chu Nan to a high-frequency vibration state.

Sure enough, as soon as he rushed into this meridian, the internal breath in the high-frequency vibration state was like a bamboo, far faster than the internal breath just now, breaking through the obstacle of this meridian, and in a blink of an eye, the entire meridian had been opened, and after a cycle, it returned to the other main meridian that Chu Nan had already opened.

"Ha, this way of opening up the meridians, I'm afraid Su Xuansheng's predecessors couldn't have dreamed of it."

The attempt was easy and successful, Chu Nan happily immediately summoned a stream of internal breath that also vibrated at high frequency and set off from the dantian, and in an instant, he had already come to the outside of another meridian that needed to be opened, and rushed in.

"Poof—"

Chu Nan's mouth opened, and a mouthful of blood spurted out.

However, he was overjoyed and forgot to adjust the intensity of the internal breath, so that as soon as the internal breath rushed into this meridian, this meridian that had not yet been accustomed to the baptism of the internal breath immediately suffered serious damage.

"Is this a joy and sorrow?"

Chu Nan reached out and touched the blood donation at the corner of his mouth, shook his head with a wry smile, obediently remobilized a faint trace of internal breath, and probed into this meridian again.

It's been repeated countless times......

……

Half a month later, a stream of internal breath circulated in the meridians that had already been opened in Chu Nan, the seven main meridians that had been newly opened, and the twenty-six secondary meridians flowed around and returned to the dantian.

Chu Nan opened his eyes and slowly exhaled.

Nine Turns of the Heart Method, successfully breaking through to the fourth level! (To be continued.) )