Ling Chen once again infiltrated the back mountain of Bachelor's Mountain.

In fact, Ling Chen felt quite ashamed of the Bachelor's Mountain Scenic Area, with a ticket of 220 yuan, he almost had to stay in the mountain behind the Bachelor's Mountain for a month, the key was that he also had to absorb the aura of the Bachelor's Mountain.

This time, I am afraid that the aura of the mountain behind the Bachelor Mountain will be absorbed to the left, and it may not be able to recover in a few years.

It is foreseeable that in the next few years, the wild ginkgo trees and alpine ficus trees in the back of the mountain will enter a slow growth period.

However, Ling Chen was just casually hypocritical, and there was no real psychological burden.

There are very few ancient martial arts cultivators in the secular world, these heaven and earth aura, if they are replaced by others, they don't have enough qi and spiritual power, so they may not be able to condense it, Ling Chen can't absorb it, and others can't absorb it, isn't it a waste of resources?

Entering the depths of the back mountain, Ling Chen picked a place to sit down, and began to operate the Mind Method of the Transformation Sect to condense the aura of heaven and earth.

The upper limit of spiritual power was raised again, and Ling Chen's condensation of energy particles was faster and wider, and the energy particles gathered around him were also denser.

Especially now that Ling Chen's skin has been re-refined, it is easier for energy particles to pass through the pores of the skin and enter the meridians, to put it simply, the efficiency of Ling Chen's absorption of spiritual energy now is almost twice as high as the last time he came to Bachelor Mountain.

Just by condensing the aura once, the true qi gathered by the energy particles filled Ling Chen's entire dantian.

Of course, this is also because the dantian has not been tempered yet, and the capacity is still very small.

Changing places, Ling Chen continued to condense the aura of heaven and earth.

The ribs and sternum have never been tempered, and once they start to be refined, they will consume a lot of spiritual energy, and the true qi of a dantian is not enough to temper half of the ribs once.

Of course, for other early stage martial artists, the spiritual power is insufficient, and it is great to be able to temper one rib at a time, in fact, most of the martial artists, one rib has to be tempered several times.

Ling Chen's upper limit of spiritual power had been raised again, and he felt that with his current spiritual power, he should be able to temper the six pairs of ribs below at the same time.

Quenching bones, the more tempered at one time, the better, the bones will be tougher and stronger, and the stomatal capacity in the bones will be more, maximizing the capacity of the meridian dantian.

The spiritual power is enough to support the refining of six pairs of ribs at the same time, what is lacking is the aura, if the refining is halfway through, the aura is consumed, and the refining effect will be greatly reduced, it is better to quench a few less at a time.

Unlike re-refining the limb bones, re-quenching the limb bones does not consume much aura, but the ribs and sternum have not been refined, and once the tempering begins, the bones will absorb a large amount of aura.

Therefore, Ling Chen was not in a hurry to refine his ribs, he had to absorb it a few more times to make the aura reach the upper limit that he could hold.

All morning, Ling Chen spent the whole morning in condensing and absorbing the aura of heaven and earth.

The consumption of spiritual power is not small, but the harvest is also considerable, in addition to the dantian is full of true qi, the yang vein, the yin vein, the yang vein, and the yin vein in the eight major meridians are full of true qi.

In the afternoon, fill the Belt Pulse, Chong Pulse, Du Pulse, and Ren Pulse with True Qi, and in the evening, you can start refining the six pairs of ribs below.

After drinking some stream water by the stream, Ling Chen fell asleep and recovered his spiritual power first, and the efficiency of condensing spiritual energy would be higher.

After sleeping until three o'clock in the afternoon, Ling Chen began to absorb the aura again, and by the time the sun set, the aura that Ling Chen had absorbed reached the upper limit of what he could now hold.

In the secular world, it is impossible to fill the meridian dantian with true qi in one day, and it is impossible to replace it with other martial artists!

But Ling Chen was still a little dissatisfied, and said to himself: "It's still very weak, if you meet a Dan Jin master, you will be killed in seconds!"

said modestly, but in his heart he was secretly happy, according to this progress, it is estimated that it will not take a year to break through Danjin.

Meng Guanglin, that old guy, do you think that my brother said that he would break through Dan Jin within a year to brag and scare you?

Wait and see!

However, Ling Chen didn't start refining his ribs right away, and after tossing for a day, his stomach was so hungry that he almost stuck to his spine.

"Get some food first, rest for two hours after you are full, let your mental strength return to the best state, and my brother will start refining his ribs!"

ran out for a spin, and when he came back, Ling Chen had two more pheasants in his hand.

Plucking, disemboweling, evisceration...... An hour later, Ling Chen ate roast pheasant, which tasted good, but when he came, he was in a hurry and forgot to bring salt up the mountain.

After resting for two hours, Ling Chen's physical strength and energy had returned to his peak state, and he could officially start refining his ribs.

There was dark energy attached to the bones, Ling Chen guided the true qi to pass, and as soon as the true qi arrived, the dark energy suddenly dispersed, and the true qi instantly covered the six pairs of ribs below.

The energy particles quickly shuttled and impacted through the pores of the ribs, and a large amount of impurities in the bones were quenched out, and Ling Chen grinned in pain.

Those impurities in the bones have long been fused with the ribs, and under the impact of the energy particles, the impurities peel off from the bones, and pain is inevitable, but it is within Ling Chen's tolerance.

While impacting and refining the impurities on the ribs, the ribs were also frantically absorbing the spiritual energy, and Ling Chen continued to mobilize the true qi to replenish the past for the ribs to absorb.

An hour later.

Ling Chen felt that the six pairs of ribs below him had undergone a qualitative change, not only the bone density and toughness had greatly increased, but even the color had changed.

Of course, the ribs are invisible to the naked eye, and they are all perceived by strong mental power.

The ribs, which had absorbed a lot of aura, began to become translucent, as if even the material had changed.

This is a normal phenomenon, refining bones is to replace the periosteum and bone with aura, and finally rely on aura to wrap the bone marrow.

At that point, even if the ribs were tempered, the ordinary bones were tempered into spirit bones.

When the spirit bone appears, the strength of qi and blood will undergo a qualitative change, and the aura can transform all the yellow bone marrow into a red bone marrow with powerful hematopoietic function.

With the qualitative change in the strength of qi and blood, the upper limit of mental power will also be greatly increased.

Of course, different martial artists have different spirit bones that are refined.

For example, Ling Chen, the strength of his spiritual power is comparable to that of a Dan Jin master, and he knows the situation of bone refining, which part is not quenched in place, he can immediately adjust the spiritual energy to continue refining.

Other martial artists don't have such strong spiritual power as him, and when refining bones, they are basically resigned to fate, and almost no one can refine perfect spirit bones.

In the future, when the spiritual power is strong, I find that the bones are flawed, but by then it is too late, and the bones tempered with spiritual energy cannot be tempered twice, and at most they can be repaired and strengthened in the future.

On the first day of refining the ribs, the ribs began to become translucent, this progress was something that Ling Chen himself did not expect, and it was estimated that it had a lot to do with the increase in the upper limit of mental power.

After refining for a while, the six pairs of ribs were roughly quenched, and what was to be done later was to further remove impurities and improve the spirit bones.