? Brief introduction to the thought of uniform motion of inner diameter

According to Neijing, the whole nature, including all substances and the whole human life activities, is always moving and endless. It summarizes the material movement as the contradictory movement of Yin and Yang, and summarizes the form of material movement as rising and falling. "On Su Wen and Liu Weizhi" says: "The rise and fall of qi, heaven and earth are more important ..... those who rise will fall, those who fall will be called heaven, those who fall will rise, and those who rise will be called earth. The weather drops and the air flows to the ground; As the air on the earth rises, so does the air in the sky, so it is called competition, and the ups and downs are interrelated. Whether it is rising or falling, it is a different form of movement. Rising and falling are interactive, so it is not only rising and falling, but also an endless movement.

The ups and downs of nature are most obviously reflected in the changes of cloud and rain between heaven and earth, that is, as Su Wen's theory of Yin and Yang said: "Clear yang is the sky, turbid yin is the ground, the ground is cloudy, it rains, it rains out of the ground, and the weather clouds out." Yang Qingzhi's qi rises to the sky, and the turbid Yin Qi condenses on the ground, but the water vapor on the ground can evaporate, turn into gas, and rise to clouds, and the clouds in the sky can form rain and then fall to the ground. Therefore, it is said that "clouds are above the earth's atmosphere, and clouds show the weather" and "rain is under the weather, and rain shows the earth's atmosphere", which not only scientifically explains the changes of clouds and rain, but also vividly illustrates the rise and fall of yin and yang of heaven and earth.

Human life is a constantly moving body. Various functional activities of the human body, such as breathing air, absorbing diet, conveying fine cloth, excreting waste, etc., are the performance of up-and-down movement and the result of up-and-down movement. This is summarized in Su Wen's theory of yin-yang correspondence: "Clear yang comes from the upper orifices, while turbid yin comes from the lower orifices;" Clear yang leads to stagnation, turbid yin leads to five zang; Clearing yang and strengthening limbs, turbid yin belongs to six hospitals. Not only that, the operation of human qi and blood camp is also a manifestation of lifting movement. "Lingshu Nutrition Health Club" said: "Camp in the pulse, keep outside the pulse, camp is endless, and it will resume at fifty, and yin and yang are intertwined, like an endless ring. The cyclic movement of human body to nourish and defend qi is the result of ascending and descending movement.

The movement of up and down is also the guarantee of life. Up and down are endless, so is everything in nature, especially human life. "On Su Wen Liu Weizhi" pointed out: "If you go in and out, you will be destroyed. If you go up or down, you will be lonely and dangerous. Therefore, you can't get in or out, you can't get old, you can't rise or fall, you can't grow, you can't close. Just up and down, nothing. " Where there are endless machines in living things, it is called "divine machine", and the appearance of living things depends on gasification, which is called "Qi Li". If the access function is abolished, the "magic machine" will be destroyed, and if the promotion function stops, "Qi Li" will be in danger.

Without differences, there would be no human occurrence, growth, strength, aging and death; Without ups and downs, there would be no occurrence, growth, change, convergence and concealment of all things. Therefore, all living things move up and down. Things can only develop and change if they move forever. "Success or failure depends on the temptation to move, and if you don't move endlessly, you will succeed" (On Six Micro-purposes). In other words, the key to success or failure in life and death lies in exercise. Keep exercising and you will keep changing. The concept of perpetual motion is an important academic thought in Neijing.