The impurities in the bone marrow are washed out little by little, and the color of the bone marrow gradually becomes more and more red, which is a bit like the color of the bone marrow of a newborn baby.

Almost all the bone marrow of newborn infants and young children is red bone marrow, and the hematopoietic function is the most vigorous, and with the increase of age, the ratio of yellow bone marrow of the human body is gradually increasing, and the yellow bone marrow is fatty bone marrow, without hematopoietic function.

To reverse the acquired to congenital, it is necessary to first rejuvenate and return to the basics.

A little bit of impurities are washed out, just like an old man gradually returning to a child.

As the vibration became more and more vibrating, the sweat of the bean size mixed with the unpleasant smell seeped out of Qin Ziling's skin, and his expression became more and more distorted and painful.

In the end, he couldn't bear it anymore, Qin Ziling opened his eyes violently, and then gasped for breath.

When people describe extreme pain, they will use one word, "pain into the bone marrow"!

What Qin Ziling is suffering now is a real pain to the bone marrow, even with his strong perseverance, he can't bear it for a long time.

After a long time, Qin Ziling gradually recovered from the pain.

After relieving himself, Qin Ziling clearly felt an indescribably fresh, rebirth-like power slowly flowing out of his bones.

This power is like a stream of clear water injected into his qi and blood strength, constantly improving the quality of his qi and blood strength.

Even, Qin Ziling seemed to feel a hint of hunger again.

His bottleneck began to loosen.

Not only the capacity of qi and blood strength, but also the quality are loosening.

"I didn't know what it meant to cut hair and wash the marrow before, but now I really understand it. The first step is actually like washing the golden sand, washing the bone marrow. It's just that the bone marrow can't really be washed, so the creator of the 'Dragon and Tiger Thunder Sound Refining Secret Method' came up with the Thunder Sound Resonance Method to wash it. After feeling it carefully, Qin Ziling couldn't help but think of the principle of sound wave resonance in another world, and it was easy to see the essential principle of this secret method at once.

"Washing the bone marrow with the thunder sound of heaven and earth is only to remove impurities, which can only be regarded as the first step, and cannot change the acquired nature of the bone marrow. Washing the bone marrow and removing impurities should be to prepare for the intersection of dragons and tigers and the birth of innate marrow.

In the "Dragon and Tiger Thunder Sound Refining Secret Method", it is said that the image of the dragon's liver, the yang thing, the flying dragon is in the sky, the cloud rises, the image of the tiger's lungs, the yin thing, running on the ground, the howling and the wind is born, the wind is thundering, the dragon and the tiger are crossed, the yin and yang will be, the essence is born, and the qi and blood are exchanged. I already understand that the wind and thunder rise, the dragon and the tiger intersect, the yin and yang will meet, the true essence is born, and what is the exchange of qi and blood? ”

Thinking of this, Qin Ziling once again looked up at the huge Thunder Xun Stone Formation on the mountain in front of him.

In the huge thunder stone, lightning and wind surged, and gradually the lightning converged into a dragon, and the wind surged into a tiger.

The dragon and tiger intersected in the Thunder Stone Stone, and although they were far apart, Qin Ziling could still feel a trace of incomparably mysterious and pure vitality faintly emanating from it.

"Isn't this just the wind and thunder, the dragon and the tiger, and the yin and yang? Could it be that the treasure that blooms with the glow is the intersection of dragons and tigers? Qin Ziling's heart shook violently, "I understand, the wind is overwhelming, everywhere, just like the qi and blood all over the body, the thunder and lightning are condensed and concentrated, and it can be regarded as the marrow in the bones." The qi and blood are transformed into tigers, and the bone marrow is transformed into dragons. Dragon and tiger cross, yin and yang will be, the true essence is born, the qi and blood around the body are exchanged, and the reversal of the acquired is congenital.

No wonder it is necessary to refine skin, bones, and organs, this is to refine qi and blood to be pure and powerful, and Lei Yin refining the marrow is to refine the bone marrow to be pure and powerful. All this is for the dragon and tiger, yin and yang, and reversal of the acquired for the congenital. ”

After understanding, Qin Ziling's gaze at Lei Xun Stonehenge became more and more intense and longing.

Because it's one thing to understand, it's another thing to work.

Qi, blood, and bone marrow are the foundation of the body, and if one is not good, I am afraid that it will go crazy.

Although the "Dragon and Tiger Thunder Sound Refining Secret Method" records the method of refining the marrow, it is mysterious and obscure, like Thunder Sound Refining Essence, Dragon and Tiger Friendship, Yin and Yang Society, etc., if it were not for Qin Ziling to enter this wind and thunder small enchantment, I am afraid it would be difficult to understand the mystery of the mystery.

Because of the thunder and lightning in the outside world, it crackles for just a few times, and disappears in a blink of an eye, how can it cause resonance and resonance?

In fact, Qin Ziling hadn't thought about it before, but he always felt that it was too unbelievable.

But in this small enchantment where the wind and thunder are dense, especially now that the thunder is on the mountain a few miles away, constantly connecting the heavens and the earth, and everything in the whole heaven and earth is shaken, Qin Ziling suddenly captured the mystery and finally understood the secret of Lei Yin's knack of refining the bone marrow.

However, the dragon and the tiger are intertwined, the yin and yang will meet, the true essence will be born, the qi and blood will be exchanged, and the reversal of the acquired will be the congenital, which is a mystery of heaven and earth that is more difficult to describe in words, and it is also a method that is even more difficult to operate.

How about the Ancient Dragon? What does a white tiger look like?

Qin Ziling couldn't see it!

How can they be imagined out of thin air when they intersect?

And this method of reversing the acquired innate method is evolved according to the intersection of the dragon and the tiger, so if you want to understand the mystery and understand the operation of the method, the best way is naturally to observe the intersection of the dragon and the tiger.

And the thunder boulder on the mountain has this vision.

Of course, the big basketball and football-sized Lei Xun boulder in his storage ring also had this vision, but it was looming and vague, far less clear than the Lei Xun boulder, and even generated some kind of glow treasure full of life.

It can be said that there is no way to compare the two.

Of course, in addition to the function of allowing Qin Ziling to comprehend the "Dragon and Tiger Thunder Sound Refining Secret Method", the Thunder Xun Boulder itself has other values that far exceed the value of the small volume of Lei Xun Stone.

"Those thirty-six thunder boulders have to find a way to get rid of them, but the thunder and lightning on the top of this mountain are too fierce, and going up is basically a dead end!" Qin Ziling looked up from time to time, touched his chin from time to time, and was a little at a loss for a while.

After a long time, Qin Ziling saw that he really couldn't think of a good way for the time being, so he decided to take advantage of the special environment here to continue the thunder sound to refine the bone marrow, and by the way, he also continued to observe the changes in the thunder on the top of the mountain to see if he could find any loopholes.

Soon, the day passed.

During this day, Qin Ziling basically spent his time in the intermittent thunder sound refining bone marrow.

Sometimes the reason for interrupting the thunder sound to refine the bone marrow is because it is too painful to continue to persevere.

Sometimes the interruption is because there are strange beasts rushing to attack, because the number of powerful strange beasts here has increased significantly, and the worst foreign beasts that appear are all fifth-grade upper-level alien beasts, with sixth-grade lower-level alien beasts as the majority, and occasionally there are sixth-grade middle-level alien beasts, but the sixth-grade upper-level alien beasts have not appeared so far.

If it was a fifth-grade upper-rank alien beast and a sixth-grade lower-rank alien beast, Qin Ziling naturally didn't have to make a move himself, and the four heavenly corpses could easily kill it with a shot.

But if a sixth-grade mid-level alien beast appeared, Qin Ziling would have to take action in person.

With the help of the four heavenly corpses, Qin Ziling is now relatively smooth and easy to kill the sixth-grade mid-level alien beasts.

I have to say that this place named Lei Gong Mountain by Qin Ziling is the most dangerous place in the small enchantment.

In just one day, Qin Ziling killed six fifth-grade upper-rank beasts, two sixth-grade lower-rank beasts, and one sixth-grade middle-rank beast.

If the news of this harvest is released, it will definitely set off an uproar.

But Qin Ziling was already a little numb, and his biggest thoughts were on the top of the mountain.