A new and blurred handwriting appeared in the place where the Tripitaka had been soaked in blood, and Ruan Jingtian carefully identified it, which was a completely different content from the Tripitaka. He re-read it from the first page and found the three big characters of "Xuangang Jue", he continued to read, and finally determined that this was a book of cultivation secrets. Ruan Jingtian understood the secret behind this Tripitaka, only after being soaked in human blood, the original Tripitaka would show the hidden "Xuangang Secret", maybe the Hu family of Zheguo knew this secret, so he sent people to the Lu family to snatch this secret. However, what puzzled Ruan Jingtian was why the Hu family only sent Hu Erma, who did not know martial arts, to carry out this task, which seemed to indicate that this secret of cultivating truth was not very important.

"Maybe the Hu family is not the only one who came to the Assassin Country, they may be looking for something more important in the Assassin Country. Ruan Jingtian thought for a while and came to this conclusion. Ruan Jingtian let go of the Hu family's affairs and concentrated on reading "Xuangang Jue".

Ruan Jingtian knew something about Xiuzhen. Cultivating truth is to cultivate the essence and spirit of the five internal organs, so that people are full of energy, vigor and blood, until they produce divine thoughts and powers, and finally achieve eternal life. According to Ruan Jingtian's knowledge, the history books record that in the ancient period 10,000 years ago, some people had cultivated to the extreme, went to the heavens and the earth, called for wind and rain, comparable to immortals, but in the nearly 2,000 years of history of the Lin Xing Continent, I have not heard of the success of cultivation, according to the development of history, the ancients can cultivate the truth successfully, then the current people should also be able to succeed, after all, knowledge and experience can be accumulated, and future generations will have more experience to learn from than their predecessors, so it makes no sense that future generations cannot cultivate successfully.

The current Lin Xing Continent has a variety of martial arts, these martial arts strengthen people's physique, study a variety of offensive and defensive techniques, so that people can defeat their opponents in combat, or save their lives. There are also martial arts that are cultivated both internally and externally, not only exercising the external physique, but also practicing the so-called inner true qi, but these internal true qi are all auxiliary martial arts to improve the attack and defense of the martial arts.

During Ruan Jingtian's study abroad in the Manguo, he also practiced the martial arts and breathing of the Manguo, and when using martial arts to attack or defend, the correct breathing can indeed increase the attack and defense. However, Ruan Jingtian had never cultivated the inner family's true qi alone, although the Thorn Kingdom had a lot of this kind of secret.

Now this "Xuangang Formula" makes Ruan Jingtian's eyes shine, Xuan is deep, thick, and far, and Gang refers to the child, meridian, Mao, and unitary, and practicing this recipe in these four hours can obtain the righteousness between heaven and earth, so that the cultivator's spirit is deep and mellow and lasting and eternal. "Xuangang Jue" is divided into three levels, the first layer is the cultivation of Xuan Jing, even if the cultivator is full of essence, not easy to get tired, and the operation of the exercises quickly recovers the body and spirit, cultivation to the consummation stage, the explosive power and endurance of the cultivator are more than dozens of times higher than that of ordinary people, and the effect of martial arts and inner true qi is far less than that of cultivation. The second layer is the cultivation of Xuan Qi, so that the cultivator can generate an aura, and can control external objects without using body parts, and cultivate to perfection, which can be within a radius of Zhangxu, and it is difficult to make ordinary cold weapons close. The third layer is the cultivation of the Xuan Shen, the cultivator can use the divine mind to attack, injuring the enemy invisibly, at this time, the cultivator can produce divine power, and it is not a problem to move mountains and seas.

Ruan Jingtian carefully studied this cultivation method, and the previous joy was gradually replaced by bitterness. He somewhat understood why he almost didn't hear the rumors of cultivation now, because he had to cultivate in an environment with abundant "aura", and if there was no "aura", the effect of cultivating truth would be far inferior to the current martial arts and the effect of the inner family's true qi.

Ruan Jingtian tried to run the primary exercises for cultivating Xuan Jing, but he did not feel the "aura" described in the "Xuan Gang Jue", and he was a little confused, what kind of substance is the "aura" of Xiuzhen? Ruan Jingtian repeatedly thought about the basic principles of Xiuzhen, and one of the main mechanisms is to stimulate the vitality and potential of human cells, so what kind of substance can rejuvenate cells?

"Oxygen!" Ruan Jingtian suddenly thought of an air composition, now the proportion of oxygen in the Lin Xing Continent to the air is about 20 percent, he also recalled a book about the geological changes of the Lin Xing Continent, which talked about the oxygen content of the Lin Xing Continent more than 10,000 years ago, as high as 40 percent, but 10,000 years ago, a terrible war almost destroyed the Lin Xing Continent, human beings and scientific and technological civilization were almost lost, and the oxygen content also dropped sharply. Since then, human beings have redeveloped and continued to consume oxygen without restraint, and the oxygen content is now only about half of the original.

"Could it be that in that era, everyone could cultivate the truth? and then lead to a fierce competition for resources, and finally a war that spans the entire continent?" Ruan Jingtian couldn't help but think deeply. "Do the great powers of cultivators really have the ability to destroy the entire planet? Because cultivators compete for aura--- oxygen, the oxygen content is reduced by half?" Ruan Jingtian felt a little nonsensical at this idea. The current oxygen level is even half of that of the ancient period, but that is a terrifying number, if the cultivator consumes all the oxygen now, then this cultivation is too terrifying.

In addition, the claim that cultivators can live forever is also very unreliable, the oxygen of the entire planet is limited, how can it satisfy the immortality of more and more cultivators? Perhaps, the top power of the cultivators may go to other planets to find new resources to immortalize themselves, even if he thinks about this, Ruan Jingtian still thinks that the theory of immortality is just a conjecture for the cultivators to entertain themselves, because no matter what planet they are on, resources are limited, not to mention the ruining wars that the cultivators have fought for resources.

Ruan Jingtian also thought of the multinational war in the Lin Xing Continent, the Manguo annexed dozens of countries in the Western Continent, and some countries were almost slaughtered; and the Zheguo of the Eastern Continent launched a war against the Assassin State in an all-round way, frantically plundering and killing, the slogan of the Zheguo is to unify the Eastern Continent, but the Assassin Country has a large population, and most of the people are unwilling to be bullied, Ruan Jingtian said ruthlessly: If you don't drive away the Zheguo Yankee, you will not give up. Thinking of this, Ruan Jingtian's heart chilled, if there was the kind of cultivation power in the ancient period now, then would the Lin Xing Continent once again fall into a place of no return? Even if there was no cultivation power, with the current thermal weapon technology, it seemed that it also had the ability to destroy the entire continent.

Ruan Jingtian felt irritable and helpless, and then he put his mind at ease, ruining the entire continent is everyone's problem, what kind of mind is he? He believed that before he was killed by someone else, he would have pulled at least one cushion on his back.

Ruan Jingtian turned to study the "Xuangang Formula" in his hand, and each level of the exercises was divided into three small levels: primary, intermediate, and advanced. Although he didn't feel the "aura", he found a problem. The principle of cultivation is nothing more than the transformation of external energy into one's own use, the lack of "aura", the energy can not be introduced into the meridians in the body, the effect of "aura" is similar to the oxygen in the combustion of a flame, without oxygen, no matter how good the fuel is, it is a pile of waste wood. Now the question is whether the "aura" is thin, can we make reasonable use of this thin "aura" and make it play its "thin" role?

Ruan Jingtian carefully studied the meridian operation of the primary "Xuan Gang Jue - Xuan Jing" primary exercise, which requires the cultivation of the circulation of the three meridians, which are the meridians of the heart, lungs, and kidneys, and reshape the essence of the body. Ruan Jingtian focused his attention on the cultivation path of the heart meridians, he found that the path given in the secret is the shortest and most efficient, if the "aura" is sufficient in the unit time, then the weekly circulation of the meridians will be completed in a short time, but now that the "aura" is insufficient, can the cultivation path be modified, so that a small amount of "aura" can pass through the unit time, but the extension of time is used to make up for the total amount of "aura".

Nguyen thought of several possible paths, where a small amount of oxygen could be allowed per unit of time, but a long path could be equal to the total amount of oxygen for the most efficient path. Ruan Jingtian carefully selected a path, calculated the time for this path to run every day, and then ran the "Xuangang Jue" exercise of condensing external energy, breathed air according to the new path, and slowly ran around the day. Gradually, Ruan Jingtian felt as if the inside of his body was being calcined by flames, and the pain of his muscles being torn hit him, he gritted his teeth and insisted, beads of sweat the size of beans oozed from his forehead.

Ruan Jingtian looked at his watch and continued to run the exercises, he wanted to at least stick to the calculated time. Time passed little by little, and after experiencing heart-rending pain, Ruan Jingtian gradually entered the state of looking at me, his consciousness remained awake, and it seemed that the feeling described in "Xuan Gang Jue" appeared. He calmed his mind and continued to perform the exercises until he felt his chest tremble, as if his whole body was filled with blood, he stood up, let out a long roar, and slammed his right fist out, and he felt the air flow around him rush forward like a tangible substance.

Ruan Jingtian was overjoyed that his method seemed to work, but the running time was about half of the calculated time, which he thought might be due to his optimistic estimation of the oxygen content in the air.

Ruan Jingtian couldn't help but admire the "Xuangang Jue", those inner true qi must not be able to match it. He believes that the essence of this secret of cultivation lies in the method of condensing external energy, the most common form of external energy is light, which integrates the energy of light into the meridians of the body through the medium of oxygen, and reshapes the internal organs. This kind of secret is definitely not something that can be mastered by the science and technology of the Lin Xing Continent now, it must be created by the science and technology of the Lin Xing Continent before the destruction of the miè.

"With this kind of science and technology, it may not be difficult to destroy the entire continent," Ruan Jingtian was fascinated by the civilization of 10,000 years ago.

Ruan Jingtian also understood that even if others got this cultivation secret, they might not be able to cultivate, because without revising the running path and not calculating the time required for oxygen, it would not be possible to run successfully every day, and at the time of destroying the planet, most of the cultivation secrets were destroyed in one fell swoop, and the existing cultivation secrets may be rare, no wonder there are almost no cultivators in the current Lin Xing Continent, and even if there were, these people would not be stupid and boastful, because the husband is not guilty, and the truth that Huaibi is guilty is known to everyone. The honest Master Lu Tingwen is a bloody lesson. Ruan Jingtian didn't know the effects of other cultivation secrets, but he vaguely felt that the "Xuangang Technique" should at least belong to the middle or above exercises.

Ruan Jingtian also thought about whether it was possible to artificially produce oxygen through guò to increase the concentration of oxygen in order to increase the speed and effect of cultivation. He looked out of the cave and realized that it was noon, and the rain had stopped. He walked out of the cave and looked at the rolling waves and the overcast sky outside, and his mood sank.