"In the modern theory of cultivation, in fact, the so-called true qi or internal strength, it is all biological energy, and it is not generated out of thin air, unless you can open up the bridge between heaven and earth, become an innate master, and be able to absorb the energy in the void, otherwise the true qi you are cultivating now is the energy of your body, and when you consume the true qi, it is consuming the energy in your body, and if you don't replenish it in time, it will hollow out the foundation of your body!"

In the classroom of the 31st class of the 13th high school in Jinghai City, a man about 30 years old and wearing a capable black short martial arts uniform was talking.

In the center of the classroom was a huge mat, and he was standing in the middle of it.

Around him, there were more than fifty students, all of whom were in class 15, most of whom were sixteen or seventeen years old, male and female, and also dressed in martial arts uniforms.

And among these students, in a remote corner, a boy of about fifteen or sixteen years old, looking sturdy and delicate, among these students, it is too mediocre and inconspicuous.

Chu Yunfan looked at the man in the center, that was the head of the martial arts sect in the thirty-fifth class of their high school, Qin Wu, I heard that he retired from the special forces in the army, and he also made a lot of contributions in the army, but then he suddenly retired without knowing why and came to teach in the thirteenth middle school.

"So the ancients had the so-called saying that the poor are rich in martial arts, which is actually a very intuitive understanding, why can only rich people practice martial arts?" Qin Wu said, paused, pointed to a student, and spoke. "Why, you say!"

The student paused for a moment, and then spoke: "Because the process of practicing martial arts is the process of constantly consuming one's own essence and blood, if there is only consumption, and there is no supplement, this person will die quickly, in ancient times, tonic medicines such as ginseng and lingzhi were very expensive, and ordinary people could not afford to consume them at all!"

"That's right, so even if there are cultivators in the Gregorian era, there are very few, and they are very few at all, until the Kunlun calendar, we humans discovered the Kunlun realm, discovered the ultra-ancient civilization, and the double major explosion of science and technology and martial arts, like ginseng and lingzhi, decades, hundreds of years can be mass-produced casually, and they are all served to the table of ordinary people, so they can support the super cultivation era where everyone of us practices martial arts!" Qin Wu nodded and said.

At this time, Chu Yunfan's mind was filled with the history of the Kunlun calendar that he had learned in history class.

Hundreds of years ago, in 2035, a huge sword sword tore through the sky, penetrated the universe, and fell into the Atlantic Ocean.

The whole earth fell into a huge catastrophe, countless countries were destroyed, mourning was everywhere, the world's population was less than one billion, and the vast majority of them were Chinese, thus opening the era of Chinese rejuvenation.

Because of this catastrophe, most of the earth collapsed, and mankind began to find another way to live.

In the end, on the other side of the rift torn by the sword, people found a vast and boundless world, which is now the Kunlun Realm.

Mankind has also entered the era of the Kunlun calendar!

When humans stepped into the Kunlun realm, they found that this Kunlun realm is not only suitable for human survival, but also suitable for the survival of some powerful creatures, because of the existence of aura, there are many powerful demon beasts living on this continent.

Even if it is a human being who has mastered high technology, it cannot be defeated by these infinite number of powerful demon beasts, some powerful demon beasts, even nuclear bombs can't be killed, in this case, not to mention immigrating to the Kunlun realm, and even once hit the edge of the two worlds, and was invaded to the base camp of human beings, the earth.

At this time, human immigrants discovered that the ultra-ancient civilization that existed in this Kunlun realm was completely different from the human beings on the earth, relying on cultivation to strengthen themselves and compete with the martial arts system of demon beasts.

All of this is just like the other world mentioned in the fantasy novel many years ago, with the more and more materials of the ultra-ancient civilization excavated, including the collation of many systems such as exercises, the earth immigrants began a great era of national martial arts.

With the dual power of martial arts and high technology, human beings have begun to gain a foothold in the Kunlun realm, and they will not be wiped out by those demon beasts.

Even so, human beings are still facing the threat of these powerful monsters all the time, and the cities they have built can still be breached, and once they are breached, hundreds of thousands, millions, or even tens of millions of people will be slaughtered, and such things have happened many times in the past few hundred years alone.

The 13th Middle School in Jinghai City on Earth is just a very ordinary high school among dozens of middle schools in Jinghai City.

After the cataclysm, most of the environment on the earth is no longer suitable for human survival, so the overall living pattern has changed the extremely scattered situation in the Gregorian era, and a total of ten base cities have been formed, each of which has hundreds of millions of people, and together, there are more than one billion people still on the earth, and they have not gone to the Kunlun realm.

Because in the Kunlun Realm, the demon beast group is too strong and not suitable for ordinary people to survive at all, although many creatures on the earth have also mutated after the cataclysm and are evolving towards demon beasts, but the time is still short, but it is only a few hundred years, which is still much weaker than the Kunlun Realm.

Jinghai City is one of the subordinate satellite cities of Donghua City, one of the ten base cities, although it is not as good as the hundreds of millions of people in the main urban area of Donghua City, but it also has a population of tens of millions.

But in general, human beings are already much stronger than hundreds of years ago, hundreds of years ago, maybe only a very few people could get the power to cultivate, which can be described as rare, and now, in order to fight against these powerful demon beasts, the federal government has tried its best to popularize cultivation to everyone.

As the head of the sect Qin Wu said, cultivation is not just talented, the land and wealth are indispensable, especially in the process of practicing martial arts, in fact, it is very harmful to the body, if you do not replenish the consumption, it is normal to die early at the age of thirty or forty while still in the prime of life, and even the more powerful, the faster you will die.

"For you at present, the source of all true qi is actually your own biological energy, the higher the level of your own physical body cultivation, the more true qi will be generated, even if you have the opportunity to cultivate to a higher realm, physical body cultivation is still the root of everything!" Qin Wu stood with his hands behind his back, and his whole person was as straight as a gun, as if he was going straight into the sky, "The Song of Knocking on the Rhyme" written by Lu Zu, a master of cultivation in the feudal era This is the first disease of cultivation, which means that only cultivating the Tao and not cultivating the physical body, this is not right, and you should cultivate both life!"

Chu Yunfan nodded, thinking of the knowledge he had learned about cultivation before, the path of cultivation was extremely long, since the discovery of the super ancient civilization, after many years of exploration, these cultivators had divided the realms in cultivation, the first of which was the physical realm.

On the way to the pinnacle of martial arts, it is like crossing the boundless sea, and the physical body is the boat that crosses the sea, the stronger the physical body, the more likely it is to cross to the boundless shore.

Therefore, boiling the physical body is the foundation of martial arts, which is called the physical body realm.

And this physical realm is divided into nine small realms, such as muscle training, bone forging, skin training, tendon training, internal strengthening, muscles and bones singing together, blood exchange, inner vision, and qi nourishment.

Only by cultivating this physical body realm to the Great Perfection can it be regarded as having laid the foundation, because in order for the body to accommodate more True Qi operating in it, it needs a strong physique.

When the ninth small realm of the physical body realm cultivates qi and raises enough true qi, it will open up a sea of qi at the dantian, and after having this sea of qi, it will be able to continuously contain the true qi, which is the so-called sea of qi realm.

After the Qi Sea Realm, there are also acquired, congenital, and so on, but Chu Yunfan doesn't know much about it, after all, many of the teachers in their thirteenth middle school are only Qi Sea Realm, and the great masters of the innate realm are not many in the entire Donghai City.

"I know that most of you should not be able to get into the martial arts class in the placement assessment in a month, and you can only be admitted to the liberal arts class, but you must understand that if you don't say that you have achieved success in cultivation, you will have to live a long life in the future, and you have to rely on your own cultivation!" Qin Wu said again, his gaze swept to everyone in the class and said. "In the Gregorian era, the average life expectancy of people was only a few tens of years old, less than a hundred years old, why, not because of poor health, long-term sub-health state, such people do not die, who dies? But we are now in the Kunlun era, everyone is a cultivator, the average life expectancy has long exceeded 100 years old, and can even reach 120 years old, this is the benefit of everyone practicing martial arts!"

Hearing Qin Wu talk about the martial arts class and the liberal arts class, Chu Yunfan's face couldn't help but be a little gloomy.

Although everyone wants to cultivate, but people's talents also have high and low, according to the standards of the thirteenth middle school, those who can reach the seventh level of the physical realm before the third class of high school are those who have good talents, and these people will be assigned to the martial arts class, and the rest are those with average qualifications, and these people are assigned to the liberal arts class.

Before the division of civil and military classes, the teaching content of liberal arts and martial arts was half and half, which was relatively average, but after the division of classes, it would quickly diverge.

Martial arts class, as the name suggests, students who enter the martial arts class will have less time to learn cultural knowledge and more time to devote to cultivation.

Although students who enter the liberal arts class do not say goodbye to cultivation from now on, they will also compress the time for cultivation and use more time to learn cultural knowledge, so that they will be admitted to universities in the future, and become office workers step by step like normal people.

As a young and enthusiastic young man, except for a few people, most people are eager to become a powerful martial artist, not only because of the strong strength and unlimited scenery, but also because it is easier for a martial artist to make money.

Not to mention, the best of them can also go to the Kunlun Realm to worship the Nine Martial Arts Holy Lands for further study, and become a super powerhouse who moves the world.

However, the truth is cruel, not everyone has the talent for cultivation, most of them have average talent, and it is difficult to cultivate, only those students who show enough talent will be selected to focus on cultivation in the martial arts class.

And Chu Yunfan is the one who has no talent, and when he goes to the third year of high school, he is only the fifth level of the physical realm, not to mention that compared with those who can enter the martial arts class, even among those students who are destined to enter the liberal arts class, they are not outstanding, they can only be regarded as ordinary.

"Okay, that's all for today's lesson, you'd better not ask for leave for tomorrow's lesson, because I'll start teaching you a martial art for actual combat, if you miss it, I won't teach it a second time, understand?" Qin Wu looked at the students and said.

"Got it!"

The students' eyes lit up and said.