"But how are we going to get out of here now?" The ancient bluebird couldn't help but look around, but didn't find any exit, it turned out that they jumped in from behind, but after jumping in, the place they occupied was a flat land, and there was no passage behind them, and the layer of white light seen outside seemed to have disappeared here, there was no white light, and there was no boundary, in the distance of this, it was a boundless white, as if the space was infinite, so that the ancient bluebird couldn't help but be curious, What the hell are they going to get out of here?

Lan Ling said: "It's very simple to leave, although we can't see any excuses, and we can't see any exits, but this place itself is a laughing space, it's just wrapped, and the white light we saw before is the limiting edge of this space, which means that this space is limited, not as endless as it seems." We jumped into this space from the outside because we crossed directly through the border, and if we wanted to get out, we only needed to find a place close to the border and jump out. ”

The ancient bluebird looked around and said, "Then are we going to go into the distance to find the boundary of this space?" ”

Lan Ling smiled: "If you go on like this, I'm afraid you will never go to the end, although this space is limited, but it is amazing, you should have seen it, when we came in before, the space outside was presented as a sphere, why do you think a space becomes a sphere?" Could it be that this is just a flat space, and then it is wrapped in a large sphere, and the flat space exists as an interface of the sphere? ”

Gu Qingniao wondered: "Isn't it? ”

Lan Ling shook his head: "Of course not, the boundary of space is not calculated like this." This misunderstanding of space is itself very wrong, since space is space, then why does it become a plane? The ground you feel is flat, just because you are in space, because if you are in space, no matter what kind of deformation occurs in the space, you will also deform with the space to the same extent, so no matter what shape the space becomes, you can't feel the deformation of the space, because your senses are relative to the space, and outside the space, the reference of the senses is another space. According to the theory of relativity, when the volume of a mass object tends to zero, its gravitational pull will reach an unimaginable level, thus changing the space, causing light to be unable to escape in its space, and then forming a space-time distortion. "The Big Bang Cosmology" (The Big Ba

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y) argues that the universe was formed by the expansion of a dense and hot singularity after a big bang 13.7 billion years ago. In 1927, the Belgian astronomer and cosmologist Lemaître (Geo

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e) The Big Bang hypothesis was proposed for the first time. In 1929, the American astronomer Hubble proposed Hubble's law that the redshift of galaxies is proportional to the distance between galaxies, and deduced the theory of cosmic expansion that galaxies are moving away from each other. One of the most influential theories in modern cosmology. Its main point is that the universe has evolved from hot to cold. During this period, the universe continued to expand, causing the density of matter to evolve from dense to thin, like a huge explosion. One of the founders of the theory was Gamow. In 1946, the American physicist Gamow formally proposed the Big Bang theory, believing that the universe was formed by a big bang that occurred about 14 billion years ago. At the end of the last century, observations of Ia supernovae showed that the universe was expanding at an accelerated rate, as the universe may be mostly composed of dark energy. The fact that space can be elongated may seem bizarre, but it has been a concept that scientists have known since the publication of Einstein's general theory of relativity in 1915. The theory of general relativity holds that gravity is actually a manifestation of the bending or deformation of space (strictly speaking, space-time). Space is elastic in the sense that it can be bent or elongated in a certain way, depending on the arrangement of matter. This idea has been amply confirmed by observations. The basic concept of expansive space can be understood with a simple simulation. Imagine a row of buttons sewn on an elastic band. Suppose stretch it from both ends of the elastic band, and as a result all the buttons are kept away from each other. Regardless of which button we choose to look at, the buttons on its adjacent side seem to be moving away, and this swelling is the same everywhere, and there is no special center. Of course, when we draw this row of buttons, it has a center button, but this has nothing to do with the way the system expands. As long as this elastic band with buttons is extended infinitely, or looped into a circle, this center is no longer there. From any button, the nearest button recedes at a certain rate, the next button reverses several times as much, and so on. In your opinion, the farther away the button is, the faster it recedes. So this expansion means that the regression velocity is proportional to the distance - an extremely important relationship. With the help of this image, we can imagine that the light waves are, and it is no wonder that Hubble found that the redshift is proportional to the distance, which is exactly the same as the results of this simple image simulation. Since the universe has a boundary, then the boundary of ordinary space must exist, but we are in space, it is difficult to observe, the boundary of the universe is far away and cannot be found, so it can only be inferred through the observation of the stars, and the space we are in is obviously simpler, it looks like a sphere from the outside, in fact, it is not to bind the space to the sphere, but to expand the space in the sphere as much as possible. You can think of it as a space that is completely attached to the inner surface of the sphere, and the plane we are standing on now is actually the inner surface of the sphere, that is, in this space, the center of the sphere is above our heads, and the place under our feet is the boundary of this space. ”

The ancient bluebird raised his feet and stepped on the ground twice, tried it and said, "Then how are we going to get out of here?" Since our feet are the boundaries of space, do we want to break the floor here? ”

Lan Ling said: "Breaking the boundaries of space is actually very simple, especially in such a small space with a distinct personality and clear boundaries. Since this space has a distinct personality, and with enough attribute energy, then you can use attribute energy to easily shuttle the boundary of this space, only need to adjust the mud's own energy to the yang attribute, and the boundary energy of this space is the same, you can cross to the outside of this space without receiving the space itself block, this is a very simple thing, although you are a girl, your own energy belongs to the negative, but yin and yang are born together, and the solitary yin is not this truth, There is no absolute yin and yang in the energy of a person, so women can also temporarily convert energy into yang attributes, and men can also temporarily convert energy into yin attributes. The philosophy of yin and yang itself has three characteristics: unity, opposition, and mutualization. In terms of thinking, it is an inseparable node of arithmetic (arithmetic) and divination (logic). The genes of living beings in nature and the binary in artificial intelligence fully demonstrate the vitality of yin and yang. Yin and Yang are the descriptions of the fundamental factors hidden behind the laws of nature and the development and change of the laws of nature in ancient Chinese civilization, the driving force behind the birth, development, maturity, decline and extinction of various things, and the core elements that lay the foundation of logical thinking in Chinese civilization. Generally speaking, according to the understanding of Yi Xue's thinking, what it describes is the most basic elements of the universe and their functions, which is one of the basic concepts of Fu Xi Yi. Yin and Yang have four pairs of relationships: Yin and Yang are mutual, Yin and Yang are cultivated, Yin and Yang are opposed, and Yin and Yang have the same root. The traditional concept is that yin and yang represent the most basic antagonistic relationship between all things. It is the objective law of nature, the origin of the movement and change of all things, and the basic law of human understanding of things. The concept of yin and yang originates from the ancient Chinese people's view of nature, and the ancients observed various opposing and related natural phenomena in nature, such as heaven and earth, sun and moon, day and night, cold and heat, men and women, up and down, etc., and summarized the concept of "yin and yang" in a philosophical way of thought. There are several groups of yin and yang relationships in the eight trigrams, the yin and yang of Qiankun, the yin and yang of Gendui, the yin and yang of Zhenxun, and the yin and yang of Kanli. Although these belong to the same yin and yang relationship, they are different and cannot be generalized. Specifically, there are the following parts: the yin and yang mutuality relationship of Qiankun, where the mutuality refers to: the two sides exist because of the existence of each other. Generally speaking, it is with the concept of the earth that there is the concept of heaven above the earth. On the other hand, heaven refers to the heaven on earth, and without this heaven there would be no corresponding earth. Heaven exists because of the existence of the earth, and the earth exists because of the existence of the heavens. The yin and yang of Gen Dui is the relationship between chemical education, and chemical education here refers to the ability to generate, conceive, and create new things. The interaction between the two hexagrams will produce and create new things. From the perspective of Fuxi Yi theory, we compare the orientation of the circle map in the "Fuxi Congenital Sixty-four Hexagram Circle Map", Dui Gong is in the southeast, and Gen Palace is in the northwest, which is in line with the geographical environment of this land in China. From the perspective of the Central Plains, the southeast is the sea, the northwest is the plateau, the southeast is the direction of the palace, and the northwest is the direction of the Gen Palace, which is exactly in line with the law revealed in the "Fuxi Congenital Sixty-four Hexagrams", which is why the people bred on the land of China have incomparable creativity, the courage and wisdom to overcome all difficulties, so that the Chinese nation has at least 6,000 years of endless life. It is precisely because of the yin and yang effect of Gendui that there are constantly new discoveries, new inventions, and new creations on the land of China, which can exist and develop forever, constantly adapt to the changes of the times, and stand at the forefront of the tide. These are all manifestations of the function of chemical education. "People" and "earth" spirits are not vain, it contains rich connotations, and people and the earth will sense each other. The same root relationship between the yin and yang of Zhenxun, the same root here refers to: the same origin, that is, the meaning that both the two hexagrams of Zhenxun originated from the Zhen hexagram. The opposition between yin and yang, here refers to two completely opposite effects. These two opposing effects have a completely different effect on the other party from the outside and the effect on the other party from the inside. It can be seen that the yin and yang properties in Bagua are not exactly the same. When it comes to yin and yang, we can only have the one-sided concept of yin and yang opposites, but we should also pay attention to differential treatment, follow commonalities, and distinguish differences. The use of wonder, in one mind. Therefore, the transformation of yin and yang is almost in a thought, since it can be born and raised, and Yang can also be sounded, then it is only necessary to communicate yin and yang, so that one of them gradually becomes stronger. Come, take my hand, and I will take you to feel the specific situation of yin and yang in your body. ”

Gu Qingniao nodded, stretched out his hand and grabbed Lan Ling's hand, and then felt that a stream of energy was swimming in his body, and after walking around according to the running route of the Heavenly Peep Secret Method, Gu Qingniao found that under the leadership of this energy, the energy contained in his body seemed to have found a condensation point, and the energy that was previously scattered throughout his body or condensed in the dantian was different from this condensed energy, and the power in the dantian and meridians was not actually controlled by the ancient bluebird Strength, energy in the dantian, or in the meridians, is not controlled by the ancient blue bird, although the energy will also be controlled by the exercises and swim away, but that is the instinct of energy, it is the energy itself that begins to surround the meridians and energy in the self-movement, the ancient blue bird only plays a guiding role in it. Yishou is a practice method and process in which a practitioner concentrates and maintains his mind on a certain part of himself or a certain thing to help his consciousness enter the state of qigong meditation, and on this basis, he exerts his consciousness initiative and actively perceives and adjusts his own functional activities to achieve good results. Yishou dantian is a practice method in which practitioners concentrate their thoughts and keep them in the dantian area, and it is one of the many methods of mindfulness. More precisely, this method belongs to the Yishou acupuncture point method in the class of Yishou itself. However, when actually practicing, people cannot keep their minds on just one acupuncture point, but can only keep their minds within a range centered on acupuncture points. And the meridians themselves, as the operation channel of energy, are actually a kind of mysterious existence, where the dantian and the meridians are, but in the consciousness, if you have to say that they are somewhere in the body, I am afraid it is difficult to find an existence that will be promoted, so the invisible and intangible things such as the dantian and the veins are not at all controlled in front of the cultivators who enter and exit the door, and they can only use the exercises to operate the energy. And at this time, the ancient blue bird clearly felt the various meridians and veins in his body, closed his eyes and even seemed to be able to see the direction of the meridians in the body, and the energy came out of the dantian, and then continued to run along these paths, and finally spread all over the body, this kind of energy has a feeling like an arm.

Lan Ling said in a deep voice: "Feel these energies carefully, the operation of these energies actually flows according to certain laws, and the energy itself has a rhythm, similar to a vortex, and it will autonomously roll forward in a rotation mode in the flow, do you feel it?" ”

Gu Qingniao felt it carefully, and really felt the characteristics that Lanling said, these energies in the meridians are like water in the water pipe, but they are not flowing normally, but are rotating forward, and this rotation itself is a special rhythm, with the rotation of energy, the taste of an attribute is generated from the energy, and the ancient bluebird sees that the energy is rotating forward counterclockwise, which is the source of the power of the yin attribute. The water swirls because of the Coriolis force. Thus the vortex in the Northern Hemisphere rotates counterclockwise, and in the Southern Hemisphere clockwise. And the yin and yang energy is also classified because of this, the yin attribute energy runs counterclockwise, and the yang attribute energy runs clockwise, which is the root of the yin and yang attributes. If you want to change the properties of the energy in your body, you must first change the direction of rotation of these energy meteors.

"Feel the energy in your body, these energies are actually generated from the dantian, the dantian is like an engine, the energy is gathered, and then released, the energy released according to the gushing mode in the dantian, forming a fixed direction of rotation, and men and women are different, the direction of rotation produced is also different. By concentrating your consciousness on the dantian, you have the heart eye and the different pupils, and you should be able to do this with ease. Then focus your consciousness on the dantian, control it, try to let the tower slowly become the output of the slow, try to make the dantian become stable, after stabilization, cut it off, and wait until the dantian outputs energy again, the energy will be disordered because of the temporary stagnation of the dantian, at this time the energy just output will be reversed for a moment, and the direction of rotation will show a different state from before, you only need to grasp this short-term mutation, and then slowly control this mutation, Let all the energy generated in the dantian be output with this inertia, and the yin and yang conversion of energy can be completed. ”

Gu Qingniao nodded, trying to feel the existence of the dantian in the way Lan Ling said, and then controlled the dantian to stabilize, as if he was controlling a water pump. Before the pump starts, the pump and the inlet pipe are filled with water, after the pump is running, under the action of the centrifugal force generated by the high-speed rotation of the impeller, the water in the impeller flow channel is thrown around, pressed into the volute, the impeller inlet forms a vacuum, and the water of the pool is sucked in along the suction pipe under the external atmospheric pressure to supplement this space. The inhaled water is then thrown out by the impeller and enters the outlet pipe through the volute. It can be seen that if the impeller of the centrifugal pump rotates continuously, it can continuously absorb and press water, and the water can be continuously lifted from low to high or far away. To sum up, a centrifugal pump is called a centrifugal pump because it lifts water to a high place due to the centrifugal force generated by the high-speed rotation of the impeller. Gu Qingniao felt that the energy operation in the dantian is probably a similar principle, in the dantian produced the pressure difference of energy, and the source of the pressure difference is the centrifugal force of the energy continuous rotation, similar to a state of energy vacuum, and this state exists for a short time, and then the energy will be converted into rotating energy, so that the energy has forward power. Centrifugal force is a virtual force, an embodiment of inertia that moves a rotating object away from its center of rotation. In Newtonian mechanics, centrifugal force has been used to describe two different concepts: an inertial force observed in a non-inertial frame of reference, and the equilibrium of centripetal forces. Under Lagrangian mechanics, centrifugal force is sometimes used to describe a generalized force at a certain generalized coordinate. In the usual context, centrifugal force is not a force that really exists. It works only so that Newton's laws of motion can still be used in a rotating frame of reference (non-inertial frame of reference). There is no centrifugal force in an inertial frame of reference, and only inertial force is required in a non-inertial frame of reference (such as a rotating frame of reference), otherwise Newton's laws of motion cannot be used. When an object is in non-linear motion (a non-Newtonian environment, such as circular motion or a turning motion), the inertia caused by the mass will force the object to continue to move in the tangential direction of the trajectory (the straight direction of the original instantaneous advance) instead of following the direction in which the next turn passed. If there are passengers on this non-linear motion object (e.g., car), the passenger will be subjected to the centripetal force provided by the car to the passenger because it also moves with the car to turn, but if the passenger is taken as the frame of reference, because the frame of reference is a non-inertial frame, he will be subjected to a centripetal force directed to the center of the circle given by the car that is relatively stationary with him, but at the same time he will also give the car a force of equal size in the opposite direction, pointing outward from the center of the circle, as if he is about to be thrown out without the car, this force is the so-called centrifugal force. Since the force felt by the object in this condition is not real in a non-inertial frame, some theories refer to this phenomenon as "centrifugal motion". We usually use the ground as a frame of reference, and it is under this premise that Newton summed up the laws of motion by assuming that the ground is stationary, or that the ground motion is regarded as a uniform linear motion over a not too long distance, that is, an inertial frame of reference. If the frame of reference is variable, i.e., non-inertial frame of reference, Newton's laws cannot be directly applied, so people have hypothesized "inertia" to solve the problem of the application of Newton's laws. Inertial centrifugal force is an imaginary force in a non-inertial frame. The following is an example of uniform circular motion: the linear velocity direction of uniform circular motion changes from moment to moment, indicating that there is centripetal acceleration, and the direction of centripetal acceleration also changes from time to time, which is a typical non-inertial frame. If there is a large turntable in a uniform circular motion, you sit on the disk and don't look at the surrounding scenery, and then you put yourself in a non-inertial frame, and you will definitely feel some kind of force that wants to push you down, and at this time there is no force to push you, this force is called inertial centrifugal force. Finally, it is reminded that the so-called "inertial force" only exists in non-inertial frames, and is a kind of virtual force, which is a fictitious force in order to generalize Newton's laws to non-inertial frames. Although the ancient blue bird can't control this centrifugal force, it can completely control its own dantian, just like Lanling said, after the dantian is temporarily stopped, the rotation of energy temporarily disappears, and the vacuum state appears in the direction of output, and when the energy starts again, there will be a period of disorder.

This disorder allows the energy to change the direction of rotation, so the ancient bluebird tried to make the dantian slowly calm down, become smooth and stable, and gradually formed a downward trend of energy output, and as the energy provided by the dantian declined, the energy operation in the body began to become peaceful, the energy speed of entering the dantian and the energy speed of the output dantian gradually began to equalize, after leveling, the rotation of energy seemed to begin to weaken a lot, and even stopped rotating a little in the end, so at this time, The ancient blue bird suddenly stopped the dantian for a moment, and waited until the output of the energy appeared for a period of time, and then urged the dantian with all its strength again, and a huge energy began to erupt from the dantian, surging forward along the meridians, and the energy that appeared at this moment showed a chaotic filling, with no stable direction of rotation, and even like a turbulent flow. Turbulence is a state of flow of fluids. When the flow velocity is very small, the fluids flow in layers and do not mix with each other, which is called laminar flow, also known as steady flow or sheet flow; Gradually increase the flow velocity, the streamline of the fluid begins to appear wave-like swing, and the frequency and amplitude of the oscillation increase with the increase of flow velocity, this flow condition is called transition flow; When the flow velocity increases to a very large level, the streamlines are no longer clearly discernible, there are many small vortices in the flow field, the laminar flow is destroyed, and there is not only slippage but also mixing between adjacent flow layers. At this time, the fluid moves irregularly, and there is a partial velocity perpendicular to the axis of the flow tube, which is called turbulence, also known as turbulence, turbulence or turbulence. Turbulence occurs under the large Reynolds number, when the Reynolds number is small, the influence of viscous force on the flow field is greater than that of inertial force, and the disturbance of flow velocity in the flow field will be attenuated due to viscous force, and the fluid flow is stable, which is laminar flow. On the contrary, if the Reynolds number is large, the influence of inertial force on the flow field is greater than that of viscous force, the fluid flow is relatively unstable, and the small changes in flow velocity are easy to develop and strengthen, forming a chaotic and irregular turbulent flow field. The basic characteristic of turbulence is the randomness of the movement of fluid micro-clusters. The turbulent micro-clusters not only have transverse pulsations, but also have reverse motions relative to the total motion of the fluid, so the trajectories of the fluid micro-clusters are extremely disordered and change rapidly with time). The most important phenomenon in turbulence is the transfer of momentum, heat, and mass caused by this random motion, which is several orders of magnitude higher than that of laminar flow. So at this moment, it is even more difficult to find that section of controllable reverse rotation energy, Gu Qingniao stared seriously at all the turbulent forms in this section of energy, they not only have counterclockwise rotation and clockwise rotation, and even divided into several levels, each of which has a different direction of energy in the sky, Gu Qingniao frowned, as carefully as possible to observe, and then finally found a little bit of normal rotation of energy output from the dantian, so he quickly controlled this section of energy, I wanted to maintain this normal rotation, but before the ancient bluebird could exert force, the energy changed to a form output, and the opportunity was fleeting, not giving her a chance at all, and then it didn't take long for the turbulence to disappear, and the energy became counterclockwise again, and the vacuum belt and turbulence area of energy traveled along the meridians, in fact, it did not bring any discomfort to the ancient bluebird, and after returning to the dantian, these two sections of energy disappeared, and it was the normal energy segment that came out of the dantian again.

Gu Qingniao opened his eyes, couldn't help but gasp, and said, "This is too difficult. ”

Lan Ling said with a smile: "In fact, it depends on the aspect of experience a little more, as long as you are familiar with it, you should be able to manipulate it very easily, even if you can't convert all the attributes, it shouldn't be a problem to easily convert temporarily, you can try a few more times, you should be able to find the trick." You should have just felt that although it is theoretically simple to master the transformation of this energy, the important thing is not the theory, but to grasp the timing, if the timing is not grasped, the energy segment that can be controlled disappears, then this conversion will fall short, in the final analysis, it is just practice makes perfect. ”

Gu Qingniao nodded, "I'll try again, fortunately, we still have time." ”

Lan Ling sat next to the ancient blue bird, watching her start to repeat the process just now, at the beginning it was still jerky, slow, because that is the ability that Lan Ling has with the help of the hand, but slowly, the ancient blue bird got used to this kind of thing, and can quickly become slow with energy, and then pinch off the dantian, this kind of operation is becoming more and more proficient Gu blue bird has become more and more handy, and the time between looking for the next opportunity has become shorter, and finally at the time of an attempt, The ancient blue bird grabbed a piece of energy that rotated clockwise, so that the inertia it generated continued to be maintained, and let it continue to output, converting the energy of the attribute into the yang attribute. But before half of the energy operation meridians were halfway, the ancient blue bird suddenly lost its strength, and the energy in the dantian suddenly turned around, turning back to counterclockwise rotation.

Opened his eyes and gasped for two breaths, Gu Qingniao said: "It seems very difficult to control the output of the dantian, the clockwise rotation energy output needs to be constantly controlled, otherwise the rotation will stop when it reaches the dantian, the meridians seem to have a counterclockwise rotating spiral, just like rifling, so that the energy in the meridians can maintain the direction of rotation, and if the direction of rotation is changed, it will produce particularly large resistance, if you don't try your best to maintain, it will slowly change back, both to control the energy and control the dantian, And after the energy went out of the dantian, it went farther and farther, and the difficulty of controlling it became more and more difficult, which was really a little uncomfortable. ”

Qigong cultivation is often said by Zhou Tianzhi. Zhou Tian, Yuan, Qi Dao's behavior. The circle is repeated over and over again, and it is said to be continuous. Little week, little round. Great week, big circle. Whether it is a perfect circle, an ellipse, a long circle, a short circle, the coming and going of the true line, the reciprocation of twists and turns, the continuation of up and down, and the exchange of man and heaven, it can be called Zhoutian. Xiao Zhoutian often refers to the cycle of the two veins of Ren and Du. Broadly speaking, the separate circulation of the three yin and three yang of the left hand and the right hand, the separate circulation of the three yin and three yang of the left foot and the right foot, the separate circulation of the veins, the separate circulation of the five internal organs and the six internal organs, and the upper and lower junctions of Baihui and perineum and Baihui and Yongquan, etc., can also be called Xiao Zhoutian. The Great Zhou Tian is divided into inside and outside the body. The Great Zhou Tian in the body refers to the great circulation of meridians throughout the body. The Great Zhou Tian in vitro refers to the exchange of the qi of the human body with the natural qi of heaven and earth. What is Yitong is to walk around the Zhou Tian route with your own thoughts. If the idea goes around, it will inevitably bring a certain impetus to the operation of the blood of the Zhou weather, and the strong one will have a greater driving effect, and the weak one will have a smaller driving effect. The so-called "consciousness to qi, qi to force, force to take effect" is also, will bring benefits to the treatment of diseases and strengthen the body. What is the meaning of qi ventilation, and the meaning of qi is sufficient and self-ventilation. This is an important sign of success in practice. At this stage, the operation of the Zhou Tian blood can be freely mobilized as it pleases, and it can also run automatically and unintentionally. This is the advanced qigong stage of "I don't practice gonggong to practice me, and people don't practice gonggong to practice themselves". The so-called "one pass every day, no disease" refers to this. However, it is very difficult to attain this state without long-term cultivation with perseverance and enlightenment. Ordinary people should not repeat and trivialize, deliberately pursue, let alone listen to the rumors that "Zhou Tian can be done quickly".

Lan Ling said with a smile: "There are indeed some lines in the meridians that control the direction of energy rotation, and it is precisely because of these lines that the turbulence that just came out of the dantian can turn into a normal rotating energy output by itself, since you cut this kind of pattern into the same as rifling, then you should also know the working principle of rifling." Rifling, also known as rifling. Because its cross-sectional shape resembles a windmill, it is also known as a windmill line. Rifling can be said to be the soul of the barrel, and the function of rifling is to give the warhead the ability to rotate, so that the warhead can still maintain a given direction after being discharged. Although rifling was used in the 15th century, it was not until the 19th century that it became widespread due to the difficulties of the manufacturing process. The history of rifling is quite long, it appeared in the XV century, but it was not until the XIX century that the armies of various countries were equipped on a large scale. The decisive reason for this was that the front-loading rifled gun was too slow to reload. Since the projectile must be embedded in the rifling in order to rotate with the rifling, the diameter of the projectile must be larger than the diameter of the male wire of the rifling, which makes the loading of the front-loading rifled gun very laborious, and the soldier often needs to hit the feeding stick with a hammer to load the projectile into the chamber. As a result, the rate of fire was reduced to a third or even slower than that of a smoothbore gun. Such a low rate of fire is intolerable for the army. So for two hundred years after the rifling was invented, rifled guns were only a supporting role in the army, until Claude Edirne Migne, captain of the Orleans Chasseurs of the French army, invented the Migne bullet in the middle of the 19th century. The caliber of the Minne bullet is one circle smaller than the diameter of the male wire of the front-loading rifled gun, which solves the problem of difficult reloading. The Minne projectile has a small conical hole in the bottom of the projectile. When fired, ** gas expands the tail of the projectile, embeds in the rifling, and is discharged with the rifling rotation at high speed. Since the diameter of the Mineer bullet was smaller than the caliber of the barrel, it was easier to reload, and the rate of fire of the front-loading rifled gun was greatly increased. After solving the problem of loading, front-loading rifled guns quickly became massively popularized around the world. The length of the barrel has a great influence on the muzzle velocity of the shot. Within a certain length, the longer the better, which is a fact that humans have discovered for a long time. This is why in the First World War, rifles with barrels of more than 30 inches were used, because the tactical idea at that time was to want riflemen to be able to reach far. However, after a certain length, the benefits it can achieve are limited, only to increase the weight in vain, and it is inconvenient to use. As a result, the barrel length of standard infantry weapons was mostly reduced to between 20 and 24 inches. Therefore, with the extension of the meridians, the rotation of energy must be greatly affected, so the biggest difficulty in changing the rotation of energy lies here, how to maintain this state for a long time, this is not a problem of inertia, it is a problem of operational ability. But in fact, fundamentally speaking, it is difficult for you to control this rotation now, or because the cultivation realm is not enough, the energy in the body is not much, the compression force is not enough, the maximum speed of energy after the output of the dantian is not as fast as me, and it takes almost a few minutes to run a week, if you cultivate to a person with a high realm, you can complete the operation of a week in almost a second, and you don't have to work hard to maintain the rotation direction of the energy, you just need to start changing. ”

Gu Qingniao sighed and said, "Then how long will it take me to master this method?" ”

Lan Ling stretched out his hand and patted the head of the ancient blue bird and said, "It's okay, take your time, come, I'll help you get familiar with the control." ”

So Lanling once again output energy to the body of the ancient blue bird, after the ancient blue bird seized the opportunity to turn the output of energy into clockwise rotation, with the ancient blue bird's mind to control the energy to continue to maintain clockwise rotation of the loading, with Lanling's care, the ancient blue bird can also temporarily let go of the control of the first part of the energy that flows out at a critical time, and when the output of the dantian begins to change, the energy output will be stabilized in the existing rotation direction, and finally complete the operation of a circle of energy, When the energy of a Zhou Tian was finished, the ancient blue bird felt that the energy of the yang attribute seemed to be able to maintain itself to a certain extent.

Lan Ling said: "After the energy conversion, there should be a period of retention, which is normal, but it will not be long before the direction of the dantian and the control of the lines in the meridians, the direction of rotation will slowly change, and it will readjust itself to its original state." At this time, the normal self-regulation phenomenon in the human body is actually no different from physical regulation. But now we don't need to keep it going, it's enough to have this transformation, come, come with me and get the energy out to the ground, and then we can get out. ”

The ancient bluebird nodded, and then gathered the energy to his feet, and sure enough, he felt a touch of energy to glory, and then the soles of his feet were empty, as if falling into the clouds, after a moment of weightlessness and trance, the ancient bluebird found that he had returned to the original world full of life.