Coming out of the Weaving Cave, Ling Chen sensed the aura on the Weaving Scenery Mountain from a distance.

The density of aura on Zhijing Mountain is better than that of the back mountain of Bachelor Mountain, but it is far less than the original aura center at the bottom of Zhijing Cave.

However, now Ling Chen's spiritual power was even stronger than the last time he came, as long as the amount of Heaven and Earth Spiritual Qi was sufficient, it would not be difficult for him to condense Heaven and Earth Spiritual Qi.

After determining the goal, Ling Chen looked for an opportunity to go up the mountain.

Unlike Bachelor's Mountain, the main attraction of Bachelor's Mountain is the mountain, and the scenic spot here is Zhijing Cave, as for Zhijing Mountain, it has not been developed at all.

Coupled with the onion cage of trees on the mountain, as long as you enter the mountain, no one will find Ling Chen's traces.

Because there were no scenic spots on the mountain, there were no obstacles around Zhijing Mountain, and there was no one to guard it, so Ling Chen easily found an entrance to the mountain.

Ling Chen didn't deliberately perceive the density of the aura, he found a place where there were more dove trees, sat down and began to condense the aura of heaven and earth.

Because the underground aura center no longer exists, on the current Zhijing Mountain, the density of the aura is not even as dense as when Ling Chen first came, and moreover, the aura has a tendency to continue to disperse.

Cultivating in such an environment would definitely not be comparable to the Weaving Cave Spiritual Qi Center, and just condensing the Heaven and Earth Spiritual Qi would consume more of Ling Chen's spiritual power.

However, now his mental power is much stronger than when he last came.

In addition, his sense of qi is also becoming stronger and stronger, and the tacit understanding between him and the aura of heaven and earth is also deepening, and now he can easily condense energy particles within a radius of three or four thousand meters.

The skin is also more sensitive than before, and the efficiency of absorbing aura is much higher than before.

It's just that because the ribs and sternum have been refined, the storage capacity of the spiritual energy is larger, and it was not until it was completely dark that the spiritual energy he absorbed filled the dantian meridians and the tempered bones.

At this time, Ling Chen's spiritual power was almost consumed.

He was too lazy to hunt for game, so he ate some compressed dry food to fill his stomach and rested on the spot.

When I woke up, a crescent moon was in the sky, and it should be the middle of the night.

Ling Chen's spiritual power had fully recovered, and the aura in his body had also reached its peak, and there was no doubt that he could refine his spine.

If it is another martial artist, the quenching of the vertebrae can only be tempered one by one, and there will always be some flaws in the seams.

Ling Chen was different, from the very beginning, he intended to temper all the vertebrae at the same time.

Even if he didn't improve his spiritual power in Suzhou, Ling Chen would have no problem refining his spine perfectly, but now the upper limit of his spiritual power has risen a lot, and he is even more comfortable refining it, and the efficiency of refining is also higher.

It's just that in this way, the true qi is consumed terribly, and after more than an hour, he absorbs most of the day's spiritual energy, and it is consumed cleanly.

At the same time, all the vertebrae are tempered, and when the tempering is completed, all the vertebrae are seamlessly connected, and the effect is absolutely perfect.

But there is also a disadvantage, that is, the progress of refining all the vertebrae at the same time is much slower than refining one or two vertebrae alone.

Now, it can only be tempered to the outermost layer of the vertebrae, not into the spinal cord, and the aura cannot activate the red bone marrow in the spinal cord, which brings Ling Chen a small increase in qi and blood, let alone a qualitative change in qi and blood.

The increase in qi and blood was not large, and the qi and blood did not change qualitatively, which meant that it would take more time for Ling Chen to recover his mental power.

However, Ling Chen didn't care, it didn't matter if he took more time to recover his mental strength, within a month, he would definitely be able to complete the refining of his spine.

There are still more than three months to go before the Provincial Martial Arts Competition, and after refining the vertebrae, there are still more than two months to temper the neck bones and skull, which is more than enough time.

Moreover, the perfectly tempered vertebrae, once tempered to the spinal cord, bring an increase in qi and blood, which is extremely terrifying.

It's not just the quantitative increase, the qualitative change is even more impressive.

Now Ling Chen, when his mental power is completely exhausted, it will take more than four hours to fully recover.

But when he finishes refining his vertebrae, the time to recover his mental strength is estimated to be cut in half.

Just once, it took two hours less to recover mental power, which seemed to be not obvious to a martial artist's long cultivation career.

But there are still many organs to be tempered in the future, whether it is refining the bones, dantian meridians, and the five internal organs, it is absolutely impossible to quench them at one time, and the spiritual power will be exhausted countless times and restored countless times.

Being able to shorten the time to recover his mental power by nearly half will undoubtedly greatly improve his cultivation efficiency in the future.

He condensed and absorbed the aura of heaven and earth twice, and only then did Ling Chen continue to sleep until his spiritual power was exhausted.

Day 2, Day 3...... Ling Chen absorbs aura, refines his spine, sleeps and rests in cycles.

The density of the aura of Zhijing Mountain is far less than that of Zhijing Cave, but it is superior in that the area is large enough, and the aura is evenly distributed.

Sometimes, Ling Chen will also get some pheasants and hares to improve his diet, gnaw dry food every day, and the birds can fade out of his mouth.

There is enough in the opposite room, and there is no need to grieve your mouth and stomach for the sake of cultivation.

The goal that Ling Chen set for himself was to complete the refining of the vertebrae within a month, and judging from the progress of the tempering, this was a task that could be completed in advance.

Every day is to absorb aura, temper the vertebrae, sleep and rest, such an ascetic life is boring and boring, but for Ling Chen, it is enjoyable.

It's a wonderful feeling that your entire vertebrae, jade from the outside in, and at the same time are jadeized from the outside in.

Especially with such a cultivation progress against the sky, after going out, he can gain a lot of horror and shock, and Ling Chen is full of a sense of accomplishment!

On the twentieth day, Ling Chen finally refined the spinal canal.

Inside the spinal canal is the spinal cord.

It was the first day of refining the spinal cord, and Ling Chen's qi and blood grew rapidly like a mountain torrent!

If Ling Chen's original amount of qi and blood was one, after refining to the spinal cord, the amount of qi and blood had almost reached it, almost doubled!

This is only the first day, after refining the spinal cord, the amount of Ling Chen's qi and blood is estimated to reach three times the original!

Not only the quantity, but also the density of qi and blood has also changed radically.

Ling Chen felt that if the same volume of blood was originally one catty, it could now weigh three catties!

Normally, after a martial artist has tempered his vertebrae, the amount and density of qi and blood can be doubled, and the effect is very good, doubling it...... It's unheard of!

That's the benefit of perfectly refining the spine!

Moreover, the spinal cord also belongs to the central nervous system, and the upper limit of mental power brought by refining the spinal cord is also very large!

How big is it?

Anyway, every time Ling Chen's qi and blood flow backwards, the upper limit of spiritual power brought by the impact of qi and blood on the dark eye is not as great as refining the spinal cord!

The quantity and quality of qi and blood have been greatly improved, the upper limit of spiritual power has also continued to increase, and Ling Chen's efficiency in refining the spinal cord has also become higher and higher.

It was originally expected to be a month, but it only took more than twenty-four days for Ling Chen to complete the quenching of his spine!

Basically, a week in advance, break through to the late stage of Huajin!