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The *Lunyu Jingwei* (Treatise on the Essence and Subtlety of Pulse Diagnosis) states: The spirit in the eyes and the five colors of the face are the external manifestations of Qi (vital energy) (The spirit manifests in the eyes, and the five colors appear on the face; both are the splendor of Qi, implying that Blood is included within Qi). A healthy red color should resemble white silk wrapping cinnabar—lustrous and contained—not like jasper (a dull, dark red). A healthy white color should resemble goose feathers—pure and moist—not like salt—dry and stark. A healthy green color should resemble the luster of dark jade—not like the color of indigo plants (dull and lifeless). A healthy yellow color should resemble raw chrysocolla wrapped in silk—bright and refined—not like loess soil—dry and muddy. A healthy black color should resemble heavy lacquer—dark and glossy—not like earth cyan (dull and withered). The "desirable" states of the five colors all seek moisture and luster; the "undesirable" states all detest dryness and withering. If the subtle images of the five colors' essence are exposed (indicating the depletion of vital essence), longevity will be short (These are signs of the exhaustion of the five colors' essence; once ominous signs appear, life will not be long).

The term "Jingming" (Spirit Brightness) refers to the ability to see all things, distinguish black from white, and judge length and shortness. If one perceives long as short or white as black, it indicates that Jing (Essence) has declined (The essential Qi of the Zang-Fu organs ascends to the eyes to create brightness, hence called "Jingming". If this brightness cannot ascend, confusion ensues, and life cannot be preserved).

The *Lingshu · Se Pian* (Chapter on Facial Color) states: The Mingtang (Bright Hall) is the nose; the Que (Palace Gate) is the space between the eyebrows; the Ting (Courtyard) is the forehead; the Fan (Screen) is the cheek sides; and the Bi (Shield) is the ear gates. These areas should be square and broad, visible from ten paces away; such a person will surely live to a hundred years (The Ting is the upper forehead, commonly called the forehead corners. The Fan and Bi act as screens for the sides. If these features are distinct from ten paces away, they are broad and square, indicating a lifespan of a century).

If the Mingtang bone is high and rising, flat and straight, the five Zang organs are arranged sequentially in the center, and the six Fu organs flank them on both sides. The head and face correspond to the Que and Ting; the Wanggong (Royal Palace, i.e., Heart) is located at the Xiaji (Lower Pole, below the eyes). When the five Zang organs are harmonious in the chest, the true color appears, pathological colors are absent, and the Mingtang is clear and moist (The signs of the five Zang are in the center; the signs of the six Fu are on the periphery. 'Ci' means position. 'Xia' means attachment. The Xiaji, between the eyes, corresponds to the Heart. As the Monarch organ, the Heart is called the Royal Palace. If the Zang organs are harmonious, the true color naturally appears, and the Mingtang must be clear and moist). When the five colors appear, each emerges in its corresponding color zone. If the bone in a specific zone is depressed, illness is inevitable. However, if the color zones show mutual generation (Sheng cycle) despite changes, even severe illness will not lead to death (Each color has its specific zone. If a zone's bone is weak and depressed, evil Qi invades causing disease. If the color changes but follows a generative relationship without destructive control, the disease, though severe, will not be fatal). Green and black indicate pain; yellow and red indicate heat; white indicates cold (This explains the pathology associated with each color).

A color that is coarse yet bright indicates mild disease; sunken and withered indicates severe disease. If the color moves upward, the disease worsens; if it moves downward like dispersing clouds, the disease is resolving (Coarse here means bright/clear. Sunken and withered means dull/stagnant. A healthy color should be bright; dullness indicates severe disease. Upward movement suggests turbid Qi is rising, worsening the condition. Downward movement suggests turbid Qi is receding, indicating recovery). The five colors have internal and external storage zones. Color moving from external to internal indicates disease progressing from exterior to interior; color moving from internal to external indicates disease progressing from interior to exterior. For diseases originating internally, treat Yin first, then Yang; reversing this worsens the condition. For diseases originating externally, treat the exterior first, then the interior; reversing this worsens the condition (The zones refer to Zang and Fu. External zones are the exterior of the Fu organs; internal zones are the interior of the Zang organs. If disease color starts externally and moves inward, it is Exterior-Basis/Interior-Branch; treat exterior first. If it starts internally and moves outward, it is Yin-Basis/Yang-Branch; treat Yin first. Reversing this constitutes misdiagnosis and aggravates the disease).

Usually observe the Que (space between eyebrows): thin and moist indicates Wind; turbid and dense indicates Bi (Obstruction); appearing on the lower part (Di Ge) indicates Jue (Cold Reversal). This is the general rule; infer the disease from the color (The Que corresponds to the Lung. Wind affects Yang/skin, so color is thin/moist. Bi affects Yin/flesh/bone, so color is turbid/dense. Jue involves cold-damp starting from below, so color appears on the Di Ge/lower face).

When Great Evil Qi enters the Zang-Fu, sudden death occurs even without prior symptoms (Great Qi refers to major pathogenic factors, e.g., Water color appearing in Fire zones. This indicates massive deficiency of Yuan Qi and arrival of hostile pathogens; sudden death is inevitable).

Red appearing on both zygomatic arches, size of a thumb, indicates that even if the illness seems to improve, sudden death will follow. Black appearing on the Ting (forehead), size of a thumb, indicates sudden death even without apparent illness (Thumb-sized discoloration is extremely ominous. Red on the cheeks relates to Lungs/Liver Wood-Fire conflict; death is certain. Black on the highest point (Ting) indicates Kidney exhaustion; death is certain).

The Ting corresponds to the head and face. The area above the Que corresponds to the throat. The Que (between eyebrows) corresponds to the Lungs. The Xiaji (below the eyes) corresponds to the Heart. The area directly below the Xiaji (nose bridge) corresponds to the Liver. To the left of the Liver area corresponds to the Gallbladder. Below the nose tip (Zhuntou/Mingtang) corresponds to the Spleen. The Fangshang (sides of the nose tip) corresponds to the Stomach. The Central area (cheeks near Da Ying acupoint) corresponds to the Large Intestine. Flanking the Large Intestine area corresponds to the Kidneys. Opposite the Kidney area corresponds to the Umbilicus. Above the Mingtang (nose tip) corresponds to the Small Intestine. Below the Mingtang corresponds to the Bladder and Zi Chu (Uterus). The Zygomatic arches correspond to the shoulders. Behind the zygomatic arches correspond to the arms. Below the arms correspond to the hands. Above the inner canthus corresponds to the Ying and breasts. Above the Cheek Rope (outer cheek) corresponds to the Back. Below the Jaw (Yache) corresponds to the Thighs. The center of the jaw corresponds to the Knees. Below the knees corresponds to the Shins. Below the shins corresponds to the Feet. The Ju Fen (corner of mouth) corresponds to the Inner Thigh. The Ju Que (jaw angle) corresponds to the Knee Cap.

[Image: Diagram of Zang-Fu and Limbs Corresponding to the Face in Lingshu]

Having distinct parts allows one to use Yin to harmonize Yang and Yang to harmonize Yin. Understanding these parts ensures accurate treatment. Distinguishing left and right is the Great Dao; knowing that men and women have different positional correspondences defines Yin and Yang. Examining luster versus withering makes one a skilled practitioner (Left is Yang, Right is Yin. Men: Left is adverse, Right is favorable. Women: Right is adverse, Left is favorable. After distinguishing Yin/Yang, assess color luster to determine prognosis). Sunken/turbid color indicates Interior disease; floating/moist color indicates Exterior disease. Yellow/Red indicates Wind; Green/Black indicates Pain; White indicates Cold; Yellow with greasy luster indicates Pus; Deep Red indicates Blood stasis. Severe pain causes spasms; severe cold causes skin anesthesia.

Observing the five colors in their respective zones: Float/Sunken reveals depth; Luster/Withering reveals prognosis; Scattered/Aggregated reveals duration; Upward/Downward movement reveals location. Bright but not coarse indicates mild disease; sunken/withered indicates severe disease. Not bright/moist but not sunken/withered indicates mild disease. Scattered color (like a foal unbridled) indicates dispersed Qi pain without solid accumulation. Kidney water overcoming Heart fire: Heart disease precedes, Kidney color appears externally (e.g., black at Xiaji). This pattern applies to other Zang pairs.

In men, color at the Mingtang indicates lower abdominal pain or testicular pain. Round/straight color in the Philtrum indicates penile pain (upper root, lower head), characteristic of Hu Hernia (Yin disorders). In women, color at the Mingtang indicates Bladder/Zi Chu disease. Scattered color indicates Qi pain; aggregated color indicates Blood mass. Shape matches the color form. Color descending to the coccyx indicates leukorrhea (greasy discharge) due to dietary indiscretion.

The five colors (Green, Black, Red, White, Yellow) should be proper and full, distinct from other zones. Red appearing in the "other zone" (Mingtang) like an elm seed implies quick recovery (Yellow is Earth's true color; presence of Wei Qi guarantees survival. Absence of Yellow in mixed colors indicates Wei Qi exhaustion and death). Sharp color points indicate the direction of invasion.

The *Wuzang Shengcheng Lun* (Treatise on the Generation of the Five Zang) states: Yellow face with green/red/white/black eyes indicates survival (Yellow represents Earth/Wei Qi). Green face with red eyes, Red face with white eyes, etc., indicate death (Absence of Yellow indicates exhausted Wei Qi).

Commentary: Inspection, Auscultation/Olfaction, Inquiry, and Palpation constitute the Four Diagnostic Methods. Inspection of color is primary. One cannot treat based on pulse alone. The Classic states: Combine pulse, eye spirit, and facial colors to assess Zang-Fu excess/deficiency and形体 (form) prosperity/decline to determine life and death. "Form and Qi compatible" is treatable. "Color and luster floating" is easily cured. "Combining color and pulse" ensures safety. Zhang Zhongjing criticized physicians who failed to inspect the Mingtang and Que. Li Haogu noted that failing to use inspection in gynecology is a patient's fault. Thus, color diagnosis is indispensable; how can physicians ignore it?