Question: "The pulse has three sections, yin-yang interact, the circulation of blood and qi, within the human body, breathing in and out, moving up and down, spreading through the body due to breath, body fluids circulate, moving according to the time, reflecting the state of the body, spring is string-like, autumn is floating, winter is sinking, summer is surging, observing the color and pulse, they vary in size, changing unpredictably over time. The measurements are inconsistent, sometimes short, sometimes long, sometimes present, sometimes absent, the condition changes frequently, advancing and retreating, rising and falling, causing confusion and loss of direction, I wish to have a detailed explanation to understand clearly." The master said: "What you ask is the root of the path, the pulse has three sections, the inch, the bar, and the gate, the circulation of blood and qi, does not lose balance, the kidney sinks, the heart surges, the lung floats, the liver is string-like, this is the constant, not losing a bit, the movement in and out, fistula disease revolves around, water circulates every two marks, returning to the inch opening, deficiency and excess are seen, changes interact, yin-yang interfere, wind causes floating emptiness, cold causes firm solidity, sinking causes water retention, thoracic fluid retention causes tight string-like pulse, movement causes pain, rapid pulse causes heat and irritation, if there is no response, know the cause of change, the three sections are different, each disease has its own manifestation. Excessive can be strange, deficient is the same, evil does not appear without reason, there must be a cause, examine the exterior and interior, differentiate the two burners, know their location, observe and diagnose, estimate the state of the organs, see clearly as if divine, I will record it for you, to pass on to the wise."

This is a general description of the root of the normal pulse, using a question and answer to show the method. The vessel is the house of blood, the circulation of qi and blood is the main active meeting. The three sections are: the inch is the upper section, the bar is the middle section, the foot is the lower section. Once the three sections are determined, yin-yang belong to them, the upper section is yang, the lower section is yin, when yin-yang are balanced they exchange, when yin-yang are biased they interact, exchange leads to harmony, interaction leads to disease. In the human body, the defense system governs qi and moves outside the vessels, the nourishment system governs blood and moves inside the vessels, so all breathing in and out, moving up and down, must spread through the body due to breath, and body fluids circulate throughout the body, so the body moves according to the time and reflects the state, the description of the pulse. Observing the color, observing the color of the five organs. Liver is green, heart is red, lung is white, kidney is black, spleen is yellow, each color corresponds to an organ, but the other four organs also take yellow as the main color, with other colors as secondary, because earth is prosperous in all seasons. Observing the pulse, observing the pulse of the five organs. Liver is string-like, heart is surging, lung is floating, kidney is sinking, spleen is slow, each pulse corresponds to an organ, but the other four organs also take the slow pulse as the base, because people take stomach qi as the base. Among them, the color may be inconsistent and mixed, the pulse may vary in size, changing unpredictably over time, the condition changes frequently, sometimes present, sometimes absent, without a fixed manifestation. The master said: "What you ask, the pulse is the root of the medical path, it should be diagnosed when it returns to the inch opening at dawn, and deficiency and excess are seen." The inch opening pulse is floating and weak, indicating emptiness and wind; firm and strong, indicating solidity and cold; sinking pulse indicates water retention, string-like pulse indicates thoracic fluid retention, moving pulse indicates pain, rapid pulse indicates heat; if the disease pulse does not respond, then in its three sections excessive deficient, the principle of yin-yang changes interaction, observe and diagnose, estimate the state of the organs, then the direction and fortune, naturally see clearly as if divine.