The first attempt was successful, and Chu Nan's confidence suddenly increased.

Dividing the internal interest into eleven strands and entering the eleven main meridians again, repeating several times, Chu Nan quickly tested the precise frequency required for the high-frequency vibration of the internal breath corresponding to each of the eleven main meridians, and then controlled the eleven internal dividends to adjust to the corresponding frequency.

It was undoubtedly more difficult to do this than just now, but after trying it twice, Chu Nan still did it accurately.

The eleven main meridians that controlled the influx of eleven internal breaths of different vibrational frequencies quickly recovered from the internal breath impact that had just exceeded the critical point of intensity.

When the meridians were almost recovered, Chu Nan mobilized the eleven strands again, and the intensity was slightly higher than the initial opening of the meridians, and the internal breath poured into the eleven meridians again.

Constantly impacting the upper limit of the meridians, so that the meridians can significantly improve their strength in the process of being damaged and then restored, this is something that Chu Nan has done countless times before, and he has already mastered it.

Moreover, with the experience of impacting the fourth and ninth heart turning method to open up the meridians, the current Chu Nan has been able to control the internal breath intensity of the impact on the newly opened meridians just right, so that it can just exceed the limit of the meridians, so that the meridians will be damaged, but it will not be too much, so that the damage to his meridians is too serious, and even lead to vomiting blood.

Of course, pain is inevitable.

Under the impact of the internal breath that exceeded the upper limit, Chu Nanqiang endured the pain, trembling lightly all over, and the newly opened eleven main meridians were damaged again and again, but they were assisted by the subsequent high-frequency vibration internal breath to recover quickly again and again.

The impact is very fast, and the whole process does not take more than ten seconds.

The repair is much slower, even if there is the most suitable frequency of high-frequency vibration to stimulate the activity of meridian cells, it will take at least nearly ten minutes to fully recover the damaged meridians.

It should be said that the vast majority of Chu Nan's cultivation was spent waiting for the meridians to recover.

This made him miss the data rehabilitation center of Xiyun College a little.

With the help of the treatment equipment of the data rehabilitation center, he will recover faster than he does now, which can help him save time.

However, he also knew that with the help of the treatment equipment, the improvement of his meridian strength after recovery would be affected and slightly reduced.

Chu Nan didn't know what the principle was, but when he was in Xiyun Academy before, he had already done this experiment, and he couldn't come to this conclusion through data.

So seriously, this nostalgia doesn't make much sense.

If I really want to say it, the biggest help for him in the Data Rehabilitation Center is that he can be more insured, and if something happens during his cultivation, he can get proper treatment immediately.

After all, his cultivation method was actually quite risky, and if it weren't for the data ability that could control the situation in his body with extreme precision, Chu Nan wouldn't dare to try it himself at all.

After five consecutive rounds of impact rerepair, the strength of the newly opened 11 major meridians has been significantly improved.

According to the data collected, these eleven meridians have even been able to withstand the operation of the second turn of internal breath.

Chu Nan tried to mobilize the internal breath from the dantian, quickly completed the second turn, and then circulated in these eleven meridians, and found that the calculation was indeed correct, the strength of these eleven meridians had indeed been greatly improved in less than an hour, which was enough to support the operation of the second turn of internal breath.

"Hah, it's long overdue."

Chu Nan happily turned his "gaze" to the other thirty-nine secondary meridians that needed to be opened up marked by the fifth mark of the Nine Turns Heart Method, and took a breath lightly, reconcentrating his mind, and a stream of internal breath poured out from his dantian.

This internal interest is first divided into eleven strands, which enter the eleven main meridians that have just been opened, and then divided into thirty-nine strands of much weaker internal interest in one go, and drill into the thirty-nine secondary meridians connected to these eleven main meridians.

Just like what Chu Nan did just now, he now tried to open up the meridians again with multi-threaded synchronization.

However, compared with just now, it is undoubtedly several times more difficult to control a full 39 internal interest shares corresponding to 39 secondary meridians in different situations at the same time.

Fortunately, Chu Nan's current data capabilities are extremely powerful, and it is not difficult to process thirty-nine threads simultaneously.

After failing a few times and readjusting a bit, Chu Nan quickly adapted and mastered the method.

Under Chu Nan's precise control, the thirty-nine strands of internal interest continued to impact the thirty-nine secondary meridians, and soon tested the best strength needed to open them.

Next, things are much simpler.

Thirty-nine internal breaths of different intensities poured into the thirty-nine secondary meridians at the same time, and Chu Nan instantly felt a pain that was even denser and more frequent than just now, but the intensity was slightly weaker.

Chu Nan's face remained unchanged this time, and all his energy was focused on precisely controlling his internal breath.

This time, it was a little slower than when I opened the eleven main meridians before.

Although the secondary meridians are easier to open than the main meridians, because the secondary meridians are more fragile than the main meridians, it is necessary to be more cautious and careful when taking a completely rough way to open the Chu Nan, otherwise it is easy to greatly exceed the upper limit of these secondary meridians, resulting in too serious damage.

Chu Nan carefully controlled the thirty-nine strands of internal interest at the same time, allowing them to flow slowly through these thirty-nine secondary meridians.

First time!

No surprises!

Thirty-nine secondary meridians, it only took less than half a minute to open all at the same time at one time!

Chu Nan didn't leave himself any time to be proud and happy at all, and immediately controlled the thirty-nine strands of internal interest to enter the thirty-nine secondary meridians, and after spending nearly ten minutes and trying hundreds of times, he tested the most suitable internal breath vibration frequency for the repair of these thirty-nine secondary meridians.

Then, the work that was repeated before was repeated again, and the thirty-nine secondary meridians were impacted and repaired.

Another hour passed.

Chu Nan ran the second turn of internal breath and flowed all the way through the thirty-nine secondary meridians, without feeling any obstacles, nor finding any signs that the meridians could not bear, and his heart was happy.

These thirty-nine secondary meridians can and can even withstand the normal operation of the second turn of internal breath, proving that he has truly succeeded in opening up those meridians that need to be opened up in the fifth level of the Nine Turns Mind Method.

In other words, he was only one step away from being able to successfully cultivate the Fifth Layer of the Nine Turns of the Mind Method.

Chu Nan's mind flashed through the fifth level of the Nine Turns of the Heart Method, which he had already remembered clearly, took a deep breath, and a stream of internal breath rose from the dantian, and quickly circulated in the body according to a trajectory that was different from the previous one, not only flowing through those meridians that had been tempered and perfected before, but also circulating in the newly opened eleven main meridians and thirty-nine secondary meridians, returning to the dantian.

Feeling that this internal interest had increased by 0.878368% compared to when he left the dantian, Chu Nan couldn't help but show a smile.

Compared with the fourth level, the fifth level of the Nine Turns Heart Method is really more exaggerated, and the increase in internal breath brought by cultivation for a week has actually increased by nearly three times!

However, this is not the most important thing.

When the internal breath flowed through all the meridians that were currently opened at the same time, Chu Nan felt as if the whole body was affected by the internal breath, every inch of muscle seemed to be stimulated by the internal breath and was full of strength, and the operation of the internal breath was far smoother than before, as long as Chu Nan wanted it to flow wherever it went, it would flow very obediently.

Chu Nan stood up, calmed down, and kicked out.

"Bang-"

A strong wind sounded, accompanied by a violent air explosion.

This kick was kicked out, and the internal breath naturally poured into the right leg, directly increasing the strength of this foot to a full 973.736191 kg!

Chu Nan shook his arm and swung his palm back more casually.

"Smack-"

The same strong wind sounded, but this time it was accompanied by a crisp explosion of air as if the air had been flattened.

This palm Chu Nan didn't care about any moves to cooperate with the internal breath operation, but just thought that the internal breath needed to be operated on the palm, and the internal breath in the dantian surged, so it was easy to flow over in an instant, making the power of this incomparably random palm actually as high as 784.718681 kilograms.

"Bang bang bang-"

"Bang Bang Bang-"

Chu Nan used both hands and feet, and in a moment, he had already raised more than ten feet, struck out more than ten palms, and each foot and foot easily brought out the internal breath surge, and the strength was amazing.

"Haha-"

Feeling the internal breath flowing easily throughout his body, moving with his heart, Chu Nan couldn't help but feel happy in his heart, and let out a burst of laughter full of surprise.

From now on, he has become a veritable internal level martial artist! (To be continued.) )