A strand of internal breath flows and surges in the meridians.

After running around a familiar route that had been running thousands of times for a day, when you re-enter the Dantian, the intensity increase of this strand of internal breath increased by 0.141392% compared to when you just left the Dantian, which was a slight increase.

However, such a slight improvement is more than twice as high as Chu Nan's improvement when he practiced the Nine-Turn Mind Method for more than ten years.

This is because Chu Nan successfully broke through the Nine-Turn Mind Method to the third level after trying to obtain data abilities. Naturally, every time he practiced the Nine-Turn Mind Method, the increase in the intensity of the internal interest will be much greater.

If he can break through the Nine-Turn Mind Method to the fourth level, although he will not be able to reach the sky in one step and directly break through the strength of a domineering warrior, and become an internal breath at one fell swoop, it will undoubtedly increase the increase in the internal breath every time he practices, and the internal breath increase speed will naturally become faster.

What Chu Nan is doing now is to conduct an experiment on the fourth level of Nine-Turn Heart Method.

According to the information related to the Nine Transformation Mind Method that Su Xuansheng left publicly that year, the Nine Transformation Mind Method actually lays the foundation from the first to the fifth level.

The third and fourth levels are just from the data point of view, and the difference is not very big.

Moreover, if you analyze the Nine-Turn Mind Method in detail, you will find that the Nine-Turn Mind Method is actually not much different from other ordinary inner breath techniques on the surface.

Theoretically, the first step in all internal breath exercises is to allow the warrior to successfully sense the existence of internal breath in the body, and then learn to operate internal breath. The next step is to use different internal breath exercises to increase internal breath through different meridian amplifications.

Although different inner breath techniques are different in details, and some special techniques even make the warrior's inner breath bring very special attributes and special properties, they are almost the same in essence.

At this point, the Nine-Turn Mind Method does not show too special.

The only difference between other inner breathing techniques is that it allows the warriors who practice it to use the inner breath to greatly increase the instantaneous burst power of the inner breath.

However, this special thing is still limited by the upper limit of meridian strength of warriors, and it is not unlimited.

Otherwise, when facing Maruke, Chu Nan could have turned his inner breath nine times, and his strength would be far better than Maruke, a third-level inner breath warrior. Not to mention knocking him away with one punch, killing him with one punch is easy.

However, after Chu Nan forced the five internal interest rotations at that time, he found a problem.

He had just turned five internal breaths and felt that the intensity of internal breath completely exceeded the upper limit of his meridians.

If the inner breath turns six times, it may cause all his meridians to be completely broken and he will die on the spot.

If you calculate this way, the nine internal breath turns are undoubtedly completely unimaginable and terrible. The meridian toughness strength required will definitely exceed the limit of the human meridians.

Since this is the case, how can we reach the state of "Nine Transformations of Internal Breath, Enlightenment to Heaven and Earth" as Su Xuansheng?

That's impossible!

Chu Nan shook his head, gave up thinking about this problem that was still very far away from him, and focused his attention on the difference between the third level and the fourth level of the Nine Turns of Mind Method.

Putting aside all other factors, just looking at it simply, the difference between the third level of the Nine Turns of Mind Method and the fourth level is that the meridians that need to be mobilized in the fourth level are much more than the third level.

However, there are only a few meridians that require internal breathing to operate, which is an extremely difficult obstacle for countless warriors.

First of all, if there are more meridians for internal breathing, it means that these meridians must be opened.

The meridians of the human body are not all unobstructed at the beginning and can allow internal breath to flow.

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

Secondly, opening these meridians can allow internal breath to flow in these meridians, which does not mean that you can feel at ease.

Unlike the meridians that have been opened before, which have been circulating for countless cycles, these meridians that have not been opened before are much less tough in strength. If they still use the same strong inner breath to suddenly rush in, it will cause a huge burden on these meridians and may even directly lead to damage to the meridians.

Not to mention using this to increase internal breath, it would be great if you can avoid injury.

However, this is not a problem for Chu Nan.

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

As for the damage to the meridians... Chu Nan is not afraid of these things now.

So he just carefully read the fourth level of the Nine Turns Mind Method several times and had basically determined the plan.

If you want to successfully break through to the fourth level of the Nine Turns of Mind Method, according to the information map of the whole body of the human body left by Su Xuansheng, Chu Nan needs to open up seven main meridians and twenty-six secondary meridians surrounding the main meridians.

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

Chu Nan thought carefully for a while and decided to start trying it from the meridian farthest from the Dantian.

With a thought, an internal breath was quickly mobilized into a major meridian closest to this meridian, and then flowed carefully under Chu Nan's control.

The intensity of this internal interest is not high. After trying it three times, let alone opening this meridian, it was impossible to even successfully enter this meridian and run smoothly.

So Chu Nan changed a little more powerful internal breath.

With the help of powerful data capabilities, the intensity of this internal dividend was controlled by Chu Nan to be extremely accurate, and the intensity was only increased by 1%.

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

So Chu Nan strengthened it by 1%.

Three more attempts...

...

Finally, after the twelfth attempt, the intensity of the internal energy increased by 12% compared to the initial stage, the internal energy finally broke through the obstacle between the two meridians and successfully poured into the main meridians that needed to be opened in the fourth level of the Nine Turns Mind Method.

As soon as the inner breath entered this meridian, Chu Nan immediately felt that the inner breath seemed to have walked from a wide and flat Yangguan Avenue into a muddy path, and it was extremely difficult to move.

If Chu Nan hadn't been mentally prepared, his control of internal interest was extremely accurate, and it might even make this internal interest out of control.

However, although it did not lose control, the internal dividend staggered forward extremely hard in this meridian, but it was gradually consumed and weakened.

Before I could fully complete this meridian, this internal breath had been completely exhausted.

Chu Nan thought for a while and then retried an internal breath from his dantian again.

The intensity of this internal interest has not increased compared to the previous one, but it was deliberately controlled by Chu Nan for the high-frequency vibration state.

Sure enough, as soon as it rushed into this meridian, the internal breathing in the high-frequency vibration state was like a bamboo shoot, which broke through the obstacles of this meridian much faster than the internal breath just now. In a blink of an eye, the entire meridian was opened. After a cycle, it returned to another major meridian that Chu Nan had already opened.

"Ha, I'm afraid Senior Su Xuansheng would never have dreamed of opening up his meridians in this way."

After a quick attempt, Chu Nan happily called an internal breath with the same high frequency vibration and set out from his dantian. In an instant, he had already arrived outside another meridian that needed to be opened and rushed in.

"puff--"

Chu Nan opened his mouth and spurted out a mouthful of blood.

This was because he was happy that he forgot to adjust the intensity of his inner breath, so that as soon as his inner breath rushes into this meridian, this meridian that has not yet been used to the baptism of inner breath was immediately seriously damaged.

"Is this considered sorrow that brings sorrow?"

Chu Nan reached out to touch the blood donated at the corner of his mouth, smiled bitterly, and shook his head obediently, mobilized a faint inner breath again, and explored the meridian again.

It was repeated countless times...

...

Half a month later, an internal breath flowed through the meridians that had been opened in Chunan, the seven newly opened main meridians and twenty-six secondary meridians, and returned to the dantian.

Chu Nan opened his eyes and slowly breathed out.

The Nine-Turn Heart Method successfully broke through to the fourth level!
Chapter completed!