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The high and vaulted area of the forehead (Tian Ting) is named Chidi Gate; the Tian Tu acupoint (Tiantu, CV22) in the depression of the qi pit is named Susha Gate; the area around the eyebrows, extending up and down about one cun, is named Wujing Gate; the chest region is named Yanche Gate; the areas under the eyes at the Sizhukong acupoint (Sizhukong, TE23) and the tear trough are named Qingyang Gate; the centers of both palms are named Zhengli Gate; the area where the navel is sealed, which is where the Spleen Meridian's Qi and Blood pour in, is named Huangdi Gate; the circular openings of both ears are named Xuanwu Gate.

The variola virus (smallpox) lesions have distinctions in the prosperity or decline of Qi and Blood, as well as in the severity of their form and color. Form belongs to Qi, while color belongs to Blood. For instance, when the lesions first appear, if they resemble mosquito bites that remain stagnant and do not rise, even if they do rise, the pustule skin will be thin, soft, and slanted. If there is no initial swelling of the face and lips, with small lesions being dense and large ones flat and depressed, this all indicates Qi deficiency and heavy form. If the lesions are small but high and prominent, with roots that are gathered, round, and clean, appearing first and growing quickly, showing increased activity daily, with a luster that is not dry, firm texture that feels obstructive to the touch, sparse distribution on the head and face, and normal appetite without decrease, this all indicates vigorous Qi and light form. If upon initial appearance of the vertex, the lesions are red and dry like fire thorns, or withered purple and dim, accompanied by macules and papules, white and withered/astringent, or black like spread dust, this all indicates stagnation of toxin and heavy color. If initially pale red, gradually becoming bright, and between the fourth and fifth days, the vertex appears white like water, with red and vibrant roots, this all indicates active Blood and light color. There are also cases where the lesion color is red-purple approaching black, black like crow feathers, but changes color after being touched, indicating still having the momentum of active Blood. If there are no complicating syndromes, rescue might be possible; however, if the color is black like charcoal, this indicates dead Blood and is incurable. Form is the fullness of Qi, and color is the brilliance of Blood. Form is prized for thick, hard, pointed, round, and raised pustule skin; if the skin is thin and flat/depressed, it is an ominous sign. Color is prized for being bright, moist, and harmonious, with red and vibrant roots; if it is dreary, dark, and dim, it is a critical sign. However, although the form rises and develops, variations occur because the color is not bright/moist and the roots are not red/vibrant. If the color is bright, harmonious, red, and vibrant, even if flat/depressed, it can be treated. Nevertheless, there are distinctions among "circular red," "surging red," and "spread red." Circular red refers to a faint red line firmly attached below the root without a tendency to scatter, which is an auspicious omen. Surging red refers to Blood having attached but the color faintly emerging in parts, which is a dangerous omen. Spread red refers to the lesion color being indistinguishable from the flesh, lying flat and spreading loosely, which is an ominous omen. The so-called "root cup" (Gen Ke) is the halo of Blood; pus is the corruption of Blood. Therefore, before the sixth day, one focuses specifically on observing the root cups. Without root cups, there will certainly be no substantial pus. After the sixth day, one focuses specifically on observing the pus color. Without pus color, healing/scabbing (Shou Ye) will certainly be difficult; this is an inevitable trend.

The celestial body is round and clear/light, while the earthly body is square and heavy/turbid. However, the variola virus lies dormant in the Kidney; the Kidney's essence generates transformation, thus possessing the function of Heaven's vigorous movement. The form is round and high, growing larger each day, which is a favorable progression (Shun). If Qi is insufficient, it cannot drive the toxin out to the exterior. If physicians fail to understand this principle and heavily employ methods to resolve the muscle layer and attack/support, taking advantage of the emptiness of the interstices (Cou Li), it leads to collapse. One lesion bursts into ten, and ten lesions merge into one, losing the round halo, resembling the image of Heaven, thereby forming crooked, flat, and smooth shapes. This is caused by insufficient righteous Qi and reckless human intervention. Therefore, skilled physicians must carefully examine the causes related to Wind, Exterior/Interior, and Deficiency/Excess to regulate them. When righteous Qi is effective, there is no place for pathogenic factors to reside. Ying and Wei harmonize, and form and color each attain their proper state. As subduing multitudes by force is inferior to winning them by virtue, the *Yusui* states: The highest grade has the "stacked pearl" form. Yin and Yang open and close, attaining the correctness of transformation mechanisms; Ying and Wei nourish each other, avoiding rebellion. The "plate pearl" form has round and harmonious root cups without worry of entanglement; the body and color are moist with a momentum of rising majestically. The "flowing pearl" form, though small, has Qi and Blood gathering without worry of intertwining; the body is dense yet true Yuan is cultivated, eliminating the ominous signs of dark purple and gray collapse. These three forms are the outstanding examples among variola lesions. Next is the "wandering silkworm" form, where Heavenly Yuan scatters and positions do not unify, and toxic pathogens run rampant, causing forms to naturally link. The "empty nest" form occurs when Qi and Blood cannot be abundant, and excessive toxins knot together in one place, aggregating regardless of size. The "melon seed" form has Qi that scatters but stays in position, and Blood that moves but does not hide in pathogens. The "arrowhead" form is shaped sharply and crookedly, not linking or merging, losing its peaceful balance and uniformity. The "stacked coin" form has internal damage to Yuan Qi and external intrusion of toxic excess, fleeing through gaps and relying on numbers for neighbors. Below these is the "snake skin break" type, where six qi colors allow groups of toxins to eat in the central palace, hundred evils gather, and the target knows no rest; this is the most ominous of variola, with death imminent. The "silkworm cloth sowing" type is densely packed without gaps, feeling insubstantial upon pressure, forming sheets without distinct points, invisible in shape; this is named "Leaf Variola" and has a mortality rate of nine out of ten. However, Blood forming shape is due to Qi. Therefore, if form loses pointedness, roundness, and fullness, blame should be placed on Qi. Attaching to Qi to form halos is due to Blood. Therefore, if color lacks brightness, moisture, and harmony, blame should be placed on Blood. *(Note: Original text says "blame on 'Tu' [chart/diagram]", which is likely a typo for "Blood" given the context "Color belongs to Blood". Translated as Blood for medical accuracy).*