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1. Yinbai (Well Point)
Location: Located at the medial end of the big toe, at the junction of the white and red skin. (The character "ce" [side] should be "zhe" [fold/bend]; this is a long-standing error in transcription.)
Indications: Abdominal distension, wheezing, and chest fullness. Inability to lie down comfortably. Vomiting. Difficulty in eating. Sudden diarrhea. Epistaxis. Sudden Shijue syndrome (a critical condition characterized by sudden fainting and loss of consciousness). Loss of consciousness. Cold feet that cannot be warmed.
Acupuncture and Moxibustion: Needle insertion depth is 3 fen. Apply 3 moxa cones. For women with prolonged menstruation beyond the expected time, needling this point can lead to immediate cessation.
Commentary: My former teacher, Mr. Xu Zhizhi, taught that the medial end of the big toe is Dazhun (LR1), not Yinbai. Yinbai is located in the crease below the big toe. The point is often hidden within the flesh and has a whitish color, hence the name Yinbai.

2. Dadu (Spring Point)
Location: Located in the depression on the medial side behind the metatarsophalangeal joint of the big toe, within the bone gap, at the junction of the red and white skin.
Indications: Heat diseases with anhidrosis. Cold extremities due to Shanghan (Cold Damage). Abdominal fullness with frequent vomiting. Restlessness, heat sensation, and mental confusion. Vomiting accompanied by dizziness.
Acupuncture and Moxibustion: Needle insertion depth is 3 fen. Moxibustion of 3 cones may be applied.
Commentary: Dadu is the Ying-Spring point of the Spleen channel. In ancient times, a city with an ancestral temple was called "Du." The "Rites of Zhou · Earth Officer" states that four counties constitute a "Du." The Spleen belongs to the Earth element and is the mother of the Four Symbols. The Ying-Spring point corresponds to Fire, which is also the mother of Earth, aligning with the meaning of an ancestral temple. In the sequence of the twelve meridians, the Spleen occupies the fourth position, consistent with the meaning of four counties forming a "Du." The point is located posterior to the prominence of the first metatarsophalangeal joint, where both the red and white skin areas are plump, hence the name Dadu.

3. Taibai (Shu-Stream Point)
Location: Located in the depression below the medial malleolus (specifically the medial cuneiform or navicular bone area, referred to as "hexie" or "hugu") on the medial aspect of the foot.
Indications: Fever, restlessness, and abdominal fullness. Abdominal distension and indigestion. Vomiting of pus and blood. Low back pain. Dyschezia (difficulty in defecation). Qi rebellion. Huoluan (food poisoning/acute gastroenteritis) with severe abdominal pain.
Acupuncture and Moxibustion: Needle insertion depth is 3 fen. Moxibustion of 3 cones may be applied.
Commentary: Taibai is the Shu-Stream point of the Yin meridian, belonging to the Earth element. Earth generates Metal; the West corresponds to Metal, whose color is white. The flesh color on the medial side of the foot is distinctly whiter than that on the dorsum or sole of the foot. It is named Taibai (Great White) based on its color. The point is located below the medial bony prominence (referred to as "hexie" or "hugu," also known as the ankle bone). The "Ben Shu" chapter of Ling Shu states: "Taibai is below the wrist bone." It is commonly known as the "lone crook bone."

4. Shangqiu (Jing-River Point)
Location: Located in the slight depression anterior to the inferior border of the medial malleolus.
Indications: Abdominal distension, borborygmus, and constipation. Melancholy due to Spleen deficiency. Chills. Sighing, sadness, and Qi rebellion. Hemorrhoids. Bone abscesses with ulceration. Female infertility. Slow convulsions in infants.
Acupuncture and Moxibustion: Needle insertion depth is 3 fen. Moxibustion of 3 cones may be applied.
Commentary: Shangqiu is the Jing-River point of the Yin meridian, belonging to the Metal element. A mound high on four sides and low in the center is called a "Qiu" (hill), representing a small rise at the beginning of climbing. "Shang" is the high tone associated with Western Metal. The Well, Spring, Stream, and River points of the Spleen are all located in lower positions. From this point upward to the medial malleolus, it intersects with the Three Yin meridians and joins Yinlingquan. One must start from a low place to climb high; hence, it is named Shangqiu.

5. Yinlingquan (He-Sea Point)
Location: Located in the depression below the tibial condyle on the medial side of the knee. Take the point with the leg extended. It is diagonally opposite to Yanglingquan (GB34) and slightly higher by one cun.
Indications: Cold in the abdomen. Anorexia. Fullness below the diaphragm. Abdominal water swelling. Hardness, wheezing, Qi rebellion, and inability to lie down. Low back pain with inability to bend forward or backward. Huoluan, hernia, and Jia masses (abdominal lumps). Dysuria. Qi-type strangury. Alternating chills and fever.
Acupuncture and Moxibustion: Needle insertion depth is 5 fen. Moxibustion is not mentioned.
Commentary: Yinlingquan is the He-Sea point of the Spleen meridian, belonging to the Water element. The Spleen is the "Zhiyin" (Extreme Yin) among the Yin organs. "Ling" (mound) is higher than "Qiu" (hill). "Quan" (spring) refers to the source of water at a high place. Therefore, the Ling Shu states: "For diseases that are high in location but involve internal pathology, select Yinlingquan." This likely represents the key mechanism of the He-Sea points, connecting downward and internally to the exterior. Treatment of disease should seek its source. Moxibustion is not mentioned for this point because the Spleen is an Earth organ. Earth contains moisture, allowing all things to be nurtured. If moxibustion were applied, it would scorch the water source, drying the earth and preventing the nurturing of life.