Chang Shan's speed of progress became slower and slower, and unconsciously, he had cultivated for eight years, but he still hadn't reached a depth of two hundred zhang in the depths of the Yongdao.

At this time, Chang Shan's control over the true yuan of a body had reached the level of his heart moving at will, and he also felt that it would definitely take a long time to go deeper, so he had the idea of leaving the martial arts hall.

As if he had been a spirit ape, Chang Shan retreated to the exit of the Yongdao in the blink of an eye with an extremely flexible body.

Chang Shan was just about to open the door of the Yongdao, and remembered something again, so he put down his raised hand again.

Under the scattered attack of seven or eight orbs, Chang Shan walked back and forth leisurely, thinking about what he was thinking.

Back then, in Dilong Valley, Chang Shan saw An Yuchen using a pair of magic weapon wings to make it extremely mysterious, so he had the idea of cultivating his bone wings.

In the next hundred years, until he met Chang Xiaoxi in Guiyin Mountain, he never used the bone wing again, and he forgot the idea of cultivating the bone wing.

At this time, Chang Shan had the idea of cultivating the bone wings again.

"Eight years of cultivation have made my body technique reach an extreme, it is better to strike while the iron is hot, and cultivate the bone wings that have not been used well. ”

After paying attention, Chang Shan summoned the bone wings out.

Chang Shan summoned the bone wings, and for a while, he still used his body to dodge the attack, and the bone wings behind him only increased his burden.

"The body's reaction seems to be too agile!"

Chang Shan frowned, a flash of light flashed in his eyes, and he used Tian Yuan's magnetic force to fly up, cutting off his own strength, and when the attack came, he took the initiative to adjust his body shape by controlling the bone wings.

The length, width and height of the Yongdao are less than two zhang, and Chang Shan's bone wings are almost one and a half zhang wide after they are expanded, and he is a little unhappy to summon the bone wings in the corridor, and in addition, his control over the bone wings is not strong, but when he is close to the door, he just started to use the bone wings to adjust his body movement, and he was hit by the beads a few times.

Near the entrance of the Yongdao, the force of the bead was not great, and when it hit Chang Shan, it did not have much impact on the True Yuan shield on his body, but when it hit his bone wing, he felt abnormal pain.

With a frown, Chang Shan condensed a layer of True Yuan shield on the surface of the bone wing with True Yuan.

In the past, Chang Shan was very easy to condense a layer of True Yuan Shield attached to the surface of his body or to prop up a spherical shield, but at this time, he condensed the True Yuan Shield on the surface of the bone wing, but he felt that he couldn't do whatever he wanted like holding up a spherical shield.

Frowning and pondering for a moment, Chang Shan no longer took the initiative to condense the True Yuan shield on the surface of the bone wing with the True Yuan, but poured the True Yuan into the bone wing, urging a layer of True Yuan shield to naturally appear on the surface of the bone wing.

This time, it was the first time that Chang Shan had infused the true element into the bone wings.

At the same time that a layer of True Yuan shield appeared on the surface of the bone wing, Chang Shan had a flash of inspiration in his mind, and suddenly thought of a question, how did the bone wing grow?

As long as he figured out how the Bone Wing grew, with Chang Shan's current knowledge, he would be able to deduce a method of actively cultivating the Bone Wing.

Chang Shan is indifferent, does not like to be competitive, does not like to compete for fame and fortune, and at the same time, when encountering some problems, he is very persistent.

This kind of attachment is not a talent, but it is better than some talents. It is precisely because of this perseverance that Changshan has achieved today's achievements on the formation road.

Now, this kind of persistence drives Chang Shan to take the initiative to exercise and cultivate bone wings.

Chang Shan's mind moved, and he collected his bone wings.

Where the bone wings are, Chang Shan has already figured it out. When Changshan retracted the bone wings, the bone wings turned into a pair of extremely small bone wings attached to Changshan's shoulder blades, which was like a magic weapon.

Chang Shan had also observed the Bone Wing before, however, he hadn't thought about cultivating the Bone Wing, and he hadn't spent too much energy observing it.

The bone wing is in Chang Shan's body, and it is obvious that it is absorbing the spiritual power in Chang Shan's body to grow. However, without more than ten days of careful observation, Chang Shan would not be able to understand the way the bone wing absorbed spiritual power.

Figuring out the way the bone wing absorbed spiritual power, Chang Shan did not rush to start cultivating the bone wing immediately, but thought about the mystery contained in the bone wing's absorption of spiritual power.

Back then, Chang Shan deduced the "Jing Yuan Shen Jue" through the process of actively absorbing spiritual power to grow through the comprehension of the Yuan Shen, and now he also wants to deduce a secret method for cultivating bone wings in the same way.

"The two bone wings grew by absorbing the spiritual energy in my body, but the process of absorbing the spiritual energy in my body did not interfere with the operation of the true element in my body. In other words, the process of absorbing the aura of the bone wing does not participate in the operation of the true element in my body, it is an independent operation system. ”

Chang Shan pondered for a long time, and suddenly thought of some statements about the circulation of spiritual power in the human body in the book "Dan Medical Dao" where the secret method of "Yi Yi Yi Life" is located.

According to the saying in "Dan Yidao", the growth of people is the process of yin and yang. In the human body, the soul in the sea of consciousness is biased towards yin, and the essence in the dantian is biased towards yang, when yin and yang are balanced, yin and yang will be born in mutual restraint, and people will absorb the aura between heaven and earth and the aura in food to grow; when yin and yang are out of balance, yin and yang will restrain each other in each other, gradually consume the aura that maintains vitality in the body, and eventually go to death.

This is true for mortals, and so are cultivators.

The process of cultivation is a process of stabilizing the balance of yin and yang in the body. The cultivator himself would not notice, but the fact was happening in the cultivator's body. Taking the initiative to absorb the aura to enhance the true element is to generate yang with yin, and to nourish the original spirit with true yuan is to generate yin with yang. In the process of yin and yang coexistence, the balance of yin and yang in the cultivator's body will become more and more stable, and the longevity will naturally become longer and longer.

When Chang Shan saw this statement, he thought that his Yuan Shen power was obviously stronger than other cultivators of the same level, but he didn't feel anything wrong, so he thought that this statement was wrong.

Later, in the process of performing the method of changing one's body for one's life, Chang Shan had a deeper understanding of the mysteries in the human body, and suddenly he realized that the big house was right, but he misunderstood.

The balance of yin and yang in the human body refers to the balance of yin and yang between the yin and yang heaven and earth of the sea and the dantian, although Chang Shan's power of the Yuan Shen is much stronger than that of ordinary cultivators of the same level, but he has not yet broken the balance of yin and yang in the sea of knowledge and the dantian, of course he did not feel anything wrong.

Thinking that the growth of people is the result of yin and yang, Chang Shan has a spiritual power exchange between the two teams of bone wings, and thinks that the growth of bone wings may also contain the mystery of yin and yang.

"Two pairs of bone wings, just like two arms, there is no difference, how to determine which bone wing is yin, and which pair of bone wings is yang?"

After thinking hard for a long time, Chang Shan thought of the process of his formation in formation, and with a light in his mind, he said secretly: "Assuming that the two bone wings, each bone wing is a balance of yin and yang, and at the same time, there is a mysterious connection between the balance of yin and yang, wouldn't this explain the way the spiritual power in the two teams of bone wings operates?"

After figuring out the growth process of the bone wing, Chang Shan began to experiment.

Chang Shan is a formation cultivator, and when he figured out the growth process of the bone wings, he thought of the formation again, so he considered laying two identical Five Elements Gathering Spirit Arrays between the two teams of bone wings.

The Five Elements Spirit Gathering Array is also divided into several kinds, and Chang Shan chooses a Five Elements Spirit Gathering Array that happens to be composed of ninety runes.

With his understanding of the formation, Chang Shan condensed the runes in the nodes of the main bone and the short bone, and then put the Five Elements Spirit Gathering Array into operation.

After the Five Elements Spirit Gathering Array was operational, the bone wing that laid down the Five Elements Spirit Gathering Array began to absorb the true element in Chang Shan's body, and the other bone wing also began to absorb the true element in Chang Shan's body.

Chang Shan's eyes lit up, and he gave up the idea of laying the Five Elements Gathering Spirit Array in the other bone wing, and concentrated on observing the operation of the aura in the two bone wings.

At the beginning, the aura operated in the two bone wings, which was operated in accordance with the way the spiritual power of the Five Elements Gathering Spirit Array operated, and after a period of time, the way the spiritual power in the two bone wings operated deviated from the spiritual power operation mode of the Five Elements Gathering Spirit Array.

Chang Shan thought that he could arrange the Five Elements Spirit Gathering Array in the bone wings again, so he allowed the spiritual power in the bone wings to change.

I don't know how long it has been, the way the spiritual power in the bone wing operates has not changed, and at this time, the speed at which the bone wing absorbs the spiritual power is almost half slower than the speed at which the spiritual power is absorbed when there is a five-element spirit gathering array in the bone wing.

"This may be the most suitable way for the spiritual power to grow in the bones!"

Thinking about it, Chang Shan once again summoned the bone wings out.

This time, there was an obvious spiritual power operating in the bone wing, and Chang Shan controlled the bone wing through the spiritual power in the bone wing, and his control over the bone wing was significantly enhanced.

With more control over the Bone Wing, Tsuneyama slowly learns how to use the Bone Wing to influence his body to dodge sudden attacks.

After cultivating at the entrance of Yongdao for half a year, Chang Shan began to move inside at a relatively fast speed.

It took half a year for Changshan to move to a depth of more than 100 zhang, and another half a year passed, and Changshan only moved forward less than 10 zhang.

Chang Shan knew that his limit had been reached.

While dodging the attack, Chang Shan carefully checked his gains.

At this time, Chang Shan's dark yellow bone wings were covered with dark gold lines, which looked like Chang Shan's bones. The quality of the bone wing has been significantly improved, and occasionally when he is hit by a round ball, the spiritual power shield naturally formed by the bone wing will block the attack, and Chang Shan will not feel too much pain.

The bone wings moved slightly, and Chang Shan's body moved slightly, and he skillfully dodged an attack. Chang Shan's control of the bone wings also hit the extent of the arm.

Chang Shan's progress was definitely not small, but when he thought that when he didn't use the bone wings, he could go deep into the depths of the Yongdao for two hundred zhang, so he decided to continue cultivating.

Advancing twelve or thirteen zhang further, Chang Shan suddenly had a bad feeling in his heart.

With a frown, Chang Shan stepped back more than twenty feet.

"Is it that Zhenyuan can't be suppressed? Why didn't this feeling appear before the first two tribulations? Could it be an illusion?"