When Li Chengtao heard that Yi Xifeng chose "Chasing the Wind Thirteen Swords", he smiled helplessly, thinking that he had found a drudgery.

However, he immediately glanced at the young man with a little appreciation, and then said slowly: "Count you kid knowledge, the skills I have learned are the most based on the internal strength exercise taught by the master, and this internal strength exercise is called Yin and Yang Double Wheel Duel." ”

Speaking of which, Li Chengtao briefly introduced the cultivation principle of this exercise.

The viscera and meridians of the upper body circulate to form the yang chakra. Yang Chakra strengthens the foundation and cultivates the yuan, enhances the potential of the viscera, penetrates the limbs, strengthens the muscles and bones, and improves the body's endurance.

The meridians of the lower body circulate as the Yin Chakra, which stabilizes the lower plate, gathers Yin and cultivates Yang, collects Qi at the legs, and repeats the cycle to enhance its speed and flexibility.

Li Chengtao glanced at Yi Xifeng, who had a deep contemplative face, and continued, "The two wheels converge at the dantian, yin and yang complement each other, and they are endless. Therefore, with this method of internal strength, the martial arts moves I created are extremely fast, and it is difficult for martial artists of the same level to keep up with my body and moves. ”

Hearing the young man's words, Yi Xifeng looked at the other party dumbfounded, but he couldn't help but want to scold his mother in his heart.

"That's the main reason why I never take in apprentices. If there is no internal strength of the master to assist, the martial arts moves I have created will not be able to bear the internal organs and legs of the performer. Li Chengtao said to himself.

Seeing the stunned face of the young man in front of him, as well as the anger hidden in his eyes, Li Chengtao actually felt happy in his heart, and relieved the embarrassment he had suffered before.

The handsome young man continued, "But you are different, do you know why?"

The white young man looked puzzled and shook his head.

"Because you are still young, you can penetrate the meridians of your whole body before you are five years old, tsk, I didn't expect that the little madman that my eldest brother said was you. If it's you, usually train harder, overcome difficulties, endure some hardships, and you can succeed!" said the man with a smile, with his slightly bookish face, it was definitely full of lethality to the girl.

It's a pity that Yi Xifeng is not a girl, and she heard the meaning of the other party's words, and said softly: "Actually, Senior Li, I think that if you teach me kung fu like this, your master will definitely be unhappy...... That, it's my honor to be able to serve my predecessors, I can give you ninety percent of the plain wine, and leave me an achievement. ”

Yi Xifeng shook his head as he spoke, stomping his little feet and slowly retreating.

Li Chengtao chuckled lightly and said, "It is fate that you and I can meet, this is your chance, don't make mistakes!"

Saying that Li Chengtao mentioned his body, Yi Xifeng only felt that there was a flower in front of him, and he was carried under the ribs by Li Chengtao and fled to the depths of the maple forest.

At midnight, Li Chengtao returned to the martial arts arena with Yi Xifeng, who had a blue nose and swollen face, and the white young man saluted respectfully to the young man with his swollen head like a pig's head, and the other party nodded slightly, and then the young man turned around and covered his face and went home.

Seeing Yi Xifeng, whose face was swollen in a circle, disappear into the night, the handsome young man said to himself: "Such a strong defense and recovery ability, coupled with super adaptability. Is this really what a mere Five Elements level exercise can bring? Big brother, will he be the person you've spent more than ten years trying to find? Let me give him a try. ”

On the second day (6 p.m.), Yi Xifeng and Li Chengtao appeared somewhere in the maple leaf forest again.

"Thirteen swords chasing the wind, the first heavy body method, followed by the moves. The body is fast and direct, there is no too much action, the change of moves pays attention to straightening and not bending, this swordsmanship has only one word: fast!

At this time, Xifeng was holding a wooden sword in his hand, listening carefully to Li Chengtao's explanation. I can't help but secretly say: This time I must learn the sword well.

He learned from the study of "general arts" that there are many kinds of weapons in the world today, and there are nearly 100 kinds of weapons, which can be divided into ten categories: knives, guns, swords, halberds, sticks, axes, hammers, hooks, forks, and crossbows.

Yi Xifeng insisted on participating in the "general arts" training since he was four years old, and in the past two years, in addition to learning various scripts and scriptures, the characteristics of different weapons have also been involved. For what kind of weapons he will use in the future, Yi Xifeng has his own plans.

His body is not majestic, not even strong, and he is not suitable for axes and hammers;

Recently, Yi Xifeng has also been hesitating about what kind of weapons to train, and what really makes him entangled in choosing is: knives, guns, and swords, these three weapons.

In terms of frequency of use, these three weapons are the most widely used weapons in the rivers and lakes, and they also have an absolute numerical advantage among famous masters.

It wasn't until before that Li Chengtao promised to teach him a kind of martial arts, and the young man really had the answer in his heart.

When he learned that Li Chengtao was creating his own swordsmanship, the irrepressible joy in Yi Xifeng's heart made him understand that the path he really wanted to choose was the path of swordsman.

When Yi Xifeng was thinking alone, the other party's voice came into his ears, "Boy, you are optimistic!"

I saw Li Chengtao holding a wooden sword and standing in front of a big tree. This big tree is the thickness of three people hugging each other, he pointed the tip of his sword at the ground, leaned forward slightly, and squatted down, only to see the figure disappear in a flash.

With a slight sound of breaking the air, the next moment appeared three feet behind the big tree. After a brief silence, there was the clatter of a tree falling and a branch breaking.

Li Chengtao still had his back to Yi Xifeng, still holding the wooden sword with one hand, and the tip of the sword was still pointing obliquely at the ground, but all this was still not as shocking as Yi Xifeng's heart!

Looking at the stump four or five feet away from him, the flat facet, it was hard to imagine that it had been cut by a wooden sword.

This shows that the power of this sword is terrifying!

During the whole process, there was only the sound of breaking the air and the sound of fallen branches of a big tree breaking. And the trunk of the tree, which was hugged by three people, did not make the slightest sound when it was cut off.

This has to make people marvel at the mastery of the sword-wielding man's moves, as well as the mastery of power!

What makes Yi Xifeng feel even more incredible is Li Chengtao's body style and speed of moves.

Judging from the sword just now, Li Chengtao moved from the front of the big tree to three zhang behind the big tree, a total of about four zhang distance, which is about thirteen meters in his previous life, and it only took a moment (about 0.36 seconds) for Li Chengtao to cut out this sword.

Yi Xifeng knew that the fastest instantaneous speed of human beings in his previous life was 45 kilometers per hour, which was converted into meters per second and about 12 meters per second. And Li Chengqian's average speed at this moment reached 36 meters per second.

In this way, it seems that the difference in values is not too big, but Yi Xifeng knows the difference between average speed and instantaneous speed!

Yi Xifeng secretly thought about it, and after a while, he couldn't help but be shocked by the results he had reached!

The instantaneous speed reached seventy-two meters per second, and the acceleration of its movement reached a terrifying forty-one times the acceleration of gravity!

In this way, Li Chengtao's instantaneous movement speed is five times the fastest speed of human beings in his previous life. And Li Chengtao under this terrifying acceleration is even more terrifying, and his destructive power will be nearly forty times stronger than that of him in a stationary state!

Li Chengtao slowly turned around and said loudly: "Chasing the Wind Thirteen Swords First Style: Chasing the Wind and Breaking the Shadow!"

Yi Xifeng thought back to the sword, the vague afterimage and the calculation conclusion he had just reached, and suddenly felt that this name was extremely appropriate.

........................ Dividing line ........................

The following does not count as words:

First, let's introduce the concept of time:

"A moment" is "a moment", also called "a moment". A moment is a thought, twenty thoughts are a moment, twenty moments are a snap of a finger, twenty snaps of a finger is a Luo pre, twenty Luo pre is a moment, and there are thirty moments in one day and one night. From this, it can be deduced that there are 86,400 seconds in a day and night, so one "moment" is equal to 2,880 seconds, one "snap of the fingers" is equal to 7.2 seconds, and one "instant" is equal to 0.36 seconds.

A moment is a thought, twenty thoughts are a moment, twenty moments are a snap of a finger, twenty snaps of a finger is a Luo pre, twenty Luo pre is a moment, and there are thirty moments in one day and one night. ———— "The Law of Monk Wisdom"

Second, Li Chengtao's speed problem

First of all, Li Chengtao's style of "chasing the wind and breaking the shadow" in the text has a moving distance of 13 meters (S=13 meters) and a split second (T=0.36 seconds). This process starts at rest and ends at rest, which can simplify the model to a linear motion with uniform speed acceleration, plus a linear motion with uniform speed deceleration. (S=s1+s2=6.5+6.5=13m, T=t1+t2=0.18+0.18=0.36 seconds). Using the formula s1=1/2*a*t1^2 and bringing in the values of s1 and t1, we can get the acceleration a=401.23 meters per square second, and 1G=9.8 meters per square second, then a=40.94G

The above formula is high school physics content, crazy is a science student, if you don't understand, please leave a message in the forum!