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Human life is generated by inheriting the Qi of Heaven, Earth, and the Five Elements. The physical form is completed by receiving the Yin and Yang Qi from parents. Thus, there are five Zang organs, six Fu organs, four limbs, twelve meridians, and three hundred and sixty-five acupoints.

A faster pulse rate is Yang, defined as six beats per respiration cycle (one exhalation and one inhalation). A slower pulse rate is Yin, defined as fewer than three beats per cycle. Within the framework of Three Regions and Nine Locations (Sanbu Jiuhou) pulse diagnosis, if the pulse morphology shows unique abnormalities—such as being exclusively large, small, rapid, or slow, or failing to correspond with the four seasons—this indicates the location of disease.

Individuals vary in their constitutional Qi and physique; some are balanced and moderate, while others are restless or calm. The pulsation of Qi and blood follows these inherent rhythms. Therefore, a pulse that beats twice during exhalation, twice during inhalation, and once during the interval between breaths, totaling five beats, represents a balanced and moderate state.

During spring and autumn, when day and night are equal, the pulse may beat more frequently during exhalation and less during inhalation, or vice versa. These variations are due to the differences in day and night length between winter and summer.

The circulation of Qi and blood, along with respiration, varies through day and night, mirroring the changes of the four seasons. However, within a fixed respiration cycle, the pulse should adhere to the limit of five beats without deficiency or deviation, just as the sundial's shadow changes with the seasons, yet the annual cycle remains constant.

If a person's appearance is either emaciated or robust, although their respiration continues uninterrupted, the number of breaths per unit of time (clepsydra) varies throughout the day and night. This is referred to as respiration mirroring the diurnal variation and adapting to the four seasons.

The twelve meridians are essentially one continuous channel, merely divided into twelve sections. How do we know this? The Hand-Taiyin Lung Meridian originates in the middle jiao and emerges at the tip of the thumb. The Hand-Yangming Large Intestine Meridian enters the heart. The Hand-Shaoyin Heart Meridian originates in the heart and runs along the palm to the little finger. The Hand-Taiyang Small Intestine Meridian originates at the tip of the little finger and obliquely connects to the inner canthus of the eye. The Foot-Taiyang Bladder Meridian... [Text fragment implies connection] ...starts from the lung, flows to the Large Intestine at Mao hour (5-7 AM), Stomach at Chen hour (7-9 AM), Spleen at Si hour (9-11 AM), Heart at Wu hour (11 AM-1 PM), Small Intestine at Wei hour (1-3 PM), Bladder at Shen hour (3-5 PM), Kidney at You hour (5-7 PM), Pericardium at Xu hour (7-9 PM), Sanjiao at Hai hour (9-11 PM), Gallbladder at Zi hour (11 PM-1 AM), and Liver at Chou hour (1-3 AM). They interconnect without interruption, ending and beginning anew.

The *Neijing* states: The Sanjiao is the envoy of the Original Qi. Humans receive Qi from Heaven and Earth. East corresponds to Jia and Yi, Wood, Wind, associated with Gallbladder (Jia) and Liver (Yi). South corresponds to Bing and Ding, Fire, Heat, associated with Small Intestine (Bing) and Heart (Ding). Southwest corresponds to Wu and Ji, Earth, Dampness, associated with Stomach (Wu) and Spleen (Ji). West corresponds to Geng and Xin, Metal, Dryness, associated with Large Intestine (Geng) and Lung (Xin). North corresponds to Ren and Gui, Water, Cold, associated with Bladder (Ren) and Kidney (Gui).

Bing represents the Sanjiao Minister Fire, the Father Qi, having no form but a name. Ding represents the Mingmen Pericardium, the Mother Qi, which is the root of post-heaven existence.

Jia, Bing, Wu, Geng, Ren represent Qi, characterized by Warmth, Heat, Coolness, Cold, and movements of Ascending, Floating, Descending, and Sinking. In Heaven, it is the Primordial Qi, manifesting as Cold, Heat, Dryness, Dampness, Wind, and Fire. In humans, it constitutes the Six Fu organs and manifests as Respiration, Ying (Nutritive), and Wei (Defensive) Qi.

Yi, Ding, Ji, Xin, Gui represent Flavors, characterized by Pungent, Sweet, Bland, Salty, Bitter, and Sour, with actions of Dispersing, Relaxing, Urgency, Softening, Hardening, and Astringing. On Earth, they constitute the Three Yin and Three Yang, manifesting as Metal, Wood, Water, Fire, and Earth. In humans, they constitute the Five Zang organs and manifest as Skin, Flesh, Sinews, Bones, and Vessels.

The Yellow Emperor asked: Is the Earth located below? Qibo answered: The Earth is beneath humanity, situated within the Great Void. The Yellow Emperor asked: What supports it? Qibo answered: The Great Qi lifts it up.

Regarding the Liver's domain and meridian, transformation from Fire leads to the decline of Spirit Qi. The Yellow Emperor heard this and asked about the differences between men and women. Answering regarding the Left Hand Heart Pulse... Wood, Fire, Earth, Metal, Water... The Five Elements... Minister Fire governs...