Since Xu Xiangrui has the heart to make friends with Li Zhe, he naturally knows everything about explaining the common sense of the cultivation world for Li Zhe.

There is a gas between heaven and earth that is invisible to the naked eye, nourishing all things in heaven and earth, and people in the cultivation realm call it heaven and earth aura. The way of cultivating the truth is to introduce the aura of heaven and earth into the human body, purify and absorb it, nourish itself, and gradually improve the essence, qi, and spirit of the person, slowly improve little by little, accumulate quantitative changes, and finally cause qualitative changes, evolve into a more advanced life form, prolong lifespan, and have incredible mana. Those who practice are called monks. There are also many forms of heaven and earth aura, in addition to the heaven and earth aura absorbed by ordinary monks, the yin qi absorbed by ghosts, the demon qi of demon beasts, etc., are all evolved from the aura of heaven and earth, and they all belong to the category of heaven and earth aura.

In other words, the aura of heaven and earth is the source of our monk's strength and the foundation of our cultivation.

The number of monks is extremely small relative to the number of mortals, and it is clear that not all mortals can become monks. In fact, all living beings living between heaven and earth can sense the aura of heaven and earth, and instinctively absorb some of it, including us human beings, so why can't all of us people embark on the path of cultivation?

In order to illustrate this issue, we have to mention the spiritual root. The predecessors of the cultivation realm created a concept called the spiritual root, which was used to represent the degree of communication between the human body and the spiritual energy of heaven and earth.

After research, the monks found that there are two kinds of people in the world, and the fundamental difference between the two types of people is the amount of the body that can attract the spiritual energy of heaven and earth. A person's body can attract enough heaven and earth spiritual energy, enough to support the operation of the foundation building exercises, so as to embark on the path of cultivating the truth and become a monk, and is called a person with spiritual roots. Although the other kind of person can also sense a part of the aura of heaven and earth, the number is too small to support the operation of the foundation building exercise, and the transformation effect on the body is extremely limited, so he cannot become a monk, and is called a person without spiritual roots. Spiritual roots are extremely rare things, and it is difficult for a person with a spiritual root to appear among 10,000 mortals.

After research, the monk also found that even if they were all people with spiritual roots, there was a huge gap in the amount of heaven and earth spiritual energy that could be communicated. The cultivation realm refers to this gap as spiritual root qualification, and subdivides it into three levels according to the level of spiritual root qualification, heavenly spiritual root, earth spiritual root, and human spiritual root.

The highest spiritual root qualification is the Heavenly Spiritual Root monk, this kind of monk body can attract the most heaven and earth spiritual energy, the easiest and fastest progress when cultivating the foundation building exercises, and the least resistance when advancing on the path of cultivation, so they can often stand at the top of the world and become invincible existences. However, the number of Heavenly Spirit Root monks is also the smallest, so small that in the long history of cultivation, there are only dozens of Heavenly Spirit Root monks who have appeared in the cultivation realm.

The second highest level of spiritual root qualification is the monk of the earth spiritual root, this kind of monk's ability to attract the spiritual energy of heaven and earth is second only to that of the monk with the heavenly spiritual root, and it is also easy to cultivate the foundation building technique, and the progress is also very fast. Therefore, once the Earth Spirit Root appears, it will immediately become the target of the major forces, as long as there are enough cultivation resources to support it, the Earth Spirit Root cultivator will basically not be able to run away when he cultivates to the Yuan Infant Stage. The number of cultivators of the Earth Spirit Root is also extremely rare, and it is also a chance of one in ten thousand among the Spirit Root.

The lowest spiritual root qualification is a monk with a human spiritual root, and this kind of monk has nothing to say, that is, he can meet the needs of the foundation building exercises and can cultivate, and the difficulty and speed of cultivation are lower than the first two. If this kind of monk wants to achieve something, in addition to cultivating hard, it also depends on his own chance.

Dividing the spiritual root qualifications into three levels looks perfect, but in fact it does not reflect the difference in spiritual root qualifications among the monks. Because the number of the first two types of monks accounts for a very small share of the entire group of monks, so small that it can be ignored, so the classification of spiritual root qualifications is equivalent to no classification.

The vast majority of monks are monks with human spiritual roots, and this kind of monks almost constitute the entire cultivation realm, and only by separating their spiritual root qualifications can they truly reflect the real gap in spiritual root qualifications among monks.

Therefore, the cultivation realm has refined the human spiritual root, and divided it into three levels: upper grade, middle grade, and lower grade according to the qualification of the spiritual root. Basically, the number of monks with high-grade human spiritual roots accounts for 10% of the total number of human spiritual root monks, the middle-grade human spiritual root accounts for 30%, and the lower grade human spiritual root accounts for 60%, and the proportion of the number of monks with three types of human spiritual roots constitutes a pyramid structure.

Hearing this, Li Zhecai roughly understood the meaning of Linggen qualification.

Then a new question arises, the spiritual root is completely a thing in the concept of existence, and it is simply invisible and intangible, how can we test its level? Li Zhe couldn't help but raise this question, which happened to scratch Xu Xiangrui's itch. Xu Xiangrui didn't seem to vomit or be unhappy, and continued to explain endlessly.

The aura of heaven and earth in the world is very thin, and mortals do not know how to build a foundation, but instinctively communicate with the aura of heaven and earth, and the fluctuations caused by the aura of heaven and earth are extremely small. Such a faint fluctuation of heaven and earth aura can only be sensed by an old monster in the infant stage who is extremely sensitive to the fluctuation of heaven and earth aura, and roughly distinguish whether a person has a spiritual root or not. However, in his infancy, he blamed himself for not having enough time to retreat and do penance, so how could he have the time to run around looking for someone with spiritual roots. Even if there is an old monster in the infancy stage who is willing to do such a stupid thing, in the face of the appearance rate of one in a thousand spiritual roots, the needle-in-a-haystack method will not work. In the early cultivation realm, it was very difficult to find a person with a spiritual root, and I don't know how many people with a spiritual root were buried because no one had discovered them.

It wasn't until a genius formation master invented the Soul Measuring Array that the situation improved to a certain extent. The Soul Detection Array is really a wonderful invention, it makes everyone who enters the Spirit Detection Array have a clear level of spiritual roots. Even with the Soul Detection Array, it is not an easy task to find someone with a spiritual root. Opening the Soul Detection Array requires the consumption of spirit stones, and the number of spirit stones to be consumed varies according to the size of the Spirit Detection Array. The spirit measuring array is not an ordinary magic circle, and it has extremely high requirements for the quality of the spirit stones that drive the magic circle, at least the high-grade spirit stones. For example, the Yunmeng Sect's Spirit Detection Array can test up to a hundred people at a time, and it requires seven high-grade spirit stones to activate. Top-grade spirit stones are extremely valuable in the cultivation realm, and even a major sect like Yunmeng Sect does not have too much inventory. Obviously, it is impossible for the Yunmeng Sect to bring all the mortals to test the spirit root, so there will be too many people to test it, and it is impossible for the Yunmeng Sect to afford the consumption of high-grade spirit stones.

"The people who can come to this sect today to be tested are all from the Xiuzhen family in Youzhou, and you are the only exception. Do you know why this is happening?" Speaking of which, Xu Xiangrui deliberately sold a pass.

"I really don't know, and I ask Immortal Master Xu for advice. Li Zhe bowed his hand to Xu Xiangrui when he heard this, and said very cooperatively.

Xu Xiangrui was sent out to welcome guests by the Yunmeng Sect, obviously he was only a low-level disciple in the Yunmeng Sect, and his knowledge of cultivation was very limited. It is rare to have the opportunity to be a teacher for others, and his vanity is greatly satisfied, and he feels even more attached when he sees Li Zhe.

Xu Xiangrui glanced at Li Zhe with satisfaction, and continued to explain to Li Zhe: "As I said just now, if there are too many people who accept the spirit test, this sect will not be able to withstand the large consumption of high-grade spirit stones. How to narrow down the scope of material selection has become a big problem, but fortunately, some monks soon discovered that it is possible to inherit the spiritual root qualification through bloodline, and the chance of a spiritual root appearing in the descendants of those with spiritual roots is much higher than that of ordinary people. Based on this discovery, the various sects encouraged those disciples who failed to cultivate the Tao to leave the sect and establish their own cultivation families to continue the bloodline. After the family is established, they send their descendants back to the sect to test the spiritual root, and those who pass will be absorbed by the sect. In this way, the Xiuzhen family can be protected by the sect, and the Xiuzhen family also provides fresh blood for the sect, which is mutually beneficial, killing two birds with one stone. There are more than a hundred large and small cultivation families attached to our Yunmeng Sect. ”

The two talked as they walked, and after a while, on the left side of the stone steps, a platform covering an area of about one acre appeared, and Xu Xiangrui led Li Zhe to the platform. There were already seventy or eighty people standing on the platform, most of them were about ten years old, and at Li Zhe's age, standing in the middle of the crowd felt a little bit out of the crowd. On the east side of the platform, there is a two-zhang high square boulder, on which two Tsing Yi scribes are meditating, and three Tsing Yi scribes are standing behind it. Seeing this scene, Li Zhe probably guessed that this kind of dress of a scribe in Tsing Yi should be the uniform dress of the monks of Yunmeng Sect.

Li Zhe still had a lot of questions in his heart that he hadn't figured out, but Xu Xiangrui's task was completed, and he wanted to go back to restore his life, lead Li Zhe to the platform, and leave. I saw some cyan points of light attached to Xu Xiangrui's body, and his whole person flew up, slowly flying towards the boulder. Seeing that Li Zhe was envious, and didn't know when I would be able to fly, Li Zhe couldn't help but be a little cranky. Falling on the boulder, Xu Xiangrui handed the Yunmeng Order in his hand to a meditating Tsing Yi scribe, and then stood behind him.

Li Zhe noticed that there was a large circular circle in the middle of the platform, and there were seven huge stone pillars towering around the circular circle, and a grass futon was placed every meter or so in the circle, this was the spirit measuring circle, Li Zhe guessed.

I had the heart to ask someone, but when I looked around from side to side, those children all looked nervous, and I couldn't bother them. Think about the soul measurement ritual that has passed, but it is a major event related to a lifetime, how can these children not be nervous. Li Zhe had no choice but to stand in place and wait, and after more than an hour, several more children were brought to the platform one after another.

At noon, two men in Tsing Yi who were meditating on the stone stood up.

The man in Tsing Yi on the left said to the man in Tsing Yi on the right: "Senior Brother Lu, I see that the hour is almost up, let's start." ”

The man in Tsing Yi on the right nodded and agreed, "Senior Brother Chen, let's start then." ”

Senior Brother Chen got Senior Brother Lu's consent, so he ordered everyone under the stone: "Little friends, the hour is almost up, please enter the magic circle and sit down." "The strength of the cultivation realm is respected, how dare the many children under the stone disobey the orders of the two high-ranking monks. After hearing the order, they hurriedly set off, walked into the magic circle, found the futons that were uninhabited, and sat down one by one.