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(Fa Re [Fever] refers to heat that persists without cessation. Han Re [Chills and Fever] refers to chills followed by fever, and fever followed by chills, occurring alternately. Chao Re [Tidal Fever] refers to fever that occurs at specific times and ceases at specific times, like the tide, without missing its schedule. If there is fever without aversion to cold accompanied by thirst, this is Wen Bing (Warm Disease). If body temperature becomes burning hot after sweating, this is Feng Wen (Wind-Warmth). If there is fever with slight coldness of the hands or feet and diarrhea with undigested food, this is Yin Zheng (Yin Syndrome). If there is hematochezia, qi stagnation, cold limbs, yet accompanied by fever, this indicates that the deeper the heat, the deeper the cold limbs (Re Shen Jue Ye Shen). Headache, fever, aversion to cold, but no body pain, indicates Shang Shi Zheng (Food Injury Syndrome). No aversion to cold, no body pain, no headache, and a non-tight pulse indicate it is not Li Shi (Interior Excess). Only feeling vexatious heat indicates Xu Fan (Deficiency Vexation).

If fever appears immediately with Zhong Feng (Wind Strike), it is because wind pathogen has injured the Wei (Defensive) level. If fever does not appear immediately with Shang Han (Cold Damage), it is because cold pathogen has injured the Ying (Nutritive) level. The Classics state: In the first or second day of Shang Han, some have already developed fever, while others have not; this is the case. Whenever there is Xi Xi Fa Re (feeling warm as if covered by feathers) accompanied by aversion to wind, aversion to cold, headache, and a floating pulse, it belongs to Biao Zheng (Exterior Syndrome). This is caused by wind-cold pathogens lodging in the skin, causing Yang Qi to be constrained and depressed; it should be treated with diaphoresis. If urine is yellow, the disease is not on the exterior. Whenever there is Zheng Zheng Fa Re (steaming fever radiating from within) accompanied by delirium, constipation, dark urine, abdominal fullness, aversion to heat, and a slippery-excess pulse, it belongs to Li Re (Interior Heat). This is caused by Yang Qi sinking into the Yin; it should be treated with purgation. If urine is clear, the disease is not on the interior. Fever occurring in the Shao Yin (Lesser Yin) and Jue Yin (Terminal Yin) meridians is called Fan Fa Re (Counter Fever); only the Tai Yin (Greater Yin) meridian does not present with fever. If the pulse is excess at all three positions (Cun, Guan, Chi) and fever does not cease, the prognosis is poor. If there is diarrhea with fever, fever recurs after sweating, the pulse is rapid and restless and does not subside with sweating, there is delirium and inability to eat, this indicates a separation of Yin and Yang, and the prognosis is poor.

The Lan Tai Zhi Li states: When pathogens are in the Three Yang meridians, Tai Yang syndrome often resembles tidal fever but differs; when pathogens are in the Three Yin meridians, Shao Yin syndrome often resembles restlessness but differs.

Fever, aversion to cold, and a floating pulse belong to the Exterior, i.e., Tai Yang Syndrome. (Formula discussions see Tai Yang Disease section.)
Fever, sweating, no aversion to cold but aversion to heat belong to the Interior, i.e., Yang Ming Syndrome. (Formula discussions see Spontaneous Sweating section.)
Fever, wiry-thin pulse, and headache belong to Half-Exterior Half-Interior, i.e., Shao Yang Syndrome. (Discussions see Bitter Taste and Dry Throat section.)
Fever with vomiting is treated with Xiao Chai Hu Tang (Minor Bupleurum Decoction). (Discussions see Vomiting section.)
Fever with cough and unresolved exterior syndrome is treated with Xiao Qing Long Tang (Minor Blue Dragon Decoction); if accompanied by hypochondriac pain and frequent belching/vomiting, it is treated with Xiao Chai Hu Tang plus Gan Jiang (Dried Ginger) and Wu Wei Zi (Schisandra). (Formula discussions see Cough section.)
Fever with wheezing and unresolved exterior syndrome is treated with Xiao Qing Long Tang minus Ma Huang (Ephedra) plus Xing Ren (Apricot Seed); if accompanied by chest fullness, it is treated with Ma Huang Tang (Ephedra Decoction). (Formula discussions see Wheezing section.)
Fever with thirst may belong to the Exterior or the Interior; treatment methods and formulas are numerous. (See the Thirst section.)

After fever resolves through sweating, if restlessness recurs after half a day, and the pulse is floating, rapid, and large, diaphoresis may be applied again, preferably Gui Zhi Tang (Cinnamon Twig Decoction). (Detailed discussion see Vexation section.)

After sweating, if aversion to wind and cold persists, it is due to deficiency; if there is no aversion to cold but only aversion to heat, it is an excess condition. One should harmonize the Stomach Qi, preferably using Tiao Wei Cheng Qi Tang (Regulate the Stomach and Order the Qi Decoction). (The Classics state: After sweating, if there is no aversion to cold, the exterior is resolved but the interior is not harmonized; give Tiao Wei Cheng Qi Tang to harmonize the Stomach Qi.)

In Tai Yang Disease, if after three days and sweating the disease is unresolved and steaming fever appears, the pathology is in the Stomach; Tiao Wei Cheng Qi Tang is the primary formula. (Haizang annotation: Da Huang (Rhubarb) drains excess, Mang Xiao (Mirabilite) softens hardness, Gan Cao (Licorice) harmonizes the middle. It can only be used when all three conditions—dryness, excess, and hardness—are present.)

**Tiao Wei Cheng Qi Tang Formula**
Da Huang (1 liang, Haizang annotation: Preferably soaked in wine. Since pathogens reside high, wine is needed to reach them, just as one must shoot to retrieve items from high places. Soaking in wine guides the medicine upward. If used raw, its bitter-draining nature is too harsh and may leave high pathogens behind, leading to post-recovery symptoms like red eyes, throat closure, or head swelling. Thus, wine soaking is used to guide upwards.)
Gan Cao (Ban liang, roasted, Haizang annotation: Sweetness relieves urgency.)
Mang Xiao (9 qian, Haizang annotation: Pungency moistens, saltiness softens.)
Crush the above ingredients, add one cup of water, boil Da Huang and Gan Cao to 70%, remove dregs, add Mang Xiao, boil briefly until boiling, and take warm in small amounts frequently.

Cheng Wuji annotation: The *Nei Jing* states: "When heat dominates internally, treat with salty-cold substances, assisted by bitter-sweet." Mang Xiao is salty-cold to remove heat; Da Huang is bitter-cold to purge excess; Gan Cao is sweet-neutral to assist the two herbs in pushing out the old and easing the middle.
Fever, sweating without resolution, epigastric stiffness/fullness, vomiting, and diarrhea are treated with Da Chai Hu Tang. (Discussions see Epigastric Fullness section.)
After sweating, if the body feels burning hot, pulse is floating, there is sweating, heaviness of the body, somnolence, and snoring, it is Feng Wen (Wind-Warmth). (Discussions see Wind-Warmth section.)
After sweating, if fever persists, palpitations occur, dizziness arises, the body trembles, and there is a sensation of wanting to fall, Zhen Wu Tang (True Warrior Decoction) is appropriate. (Discussions see Diarrhea section.)
If sweating leads to persistent heat, internal cramping, limb pain, diarrhea, cold limbs, and aversion to cold, Si Ni Tang (Frigid Extremities Decoction) is appropriate. (Discussions see Diarrhea section.)
If massive sweating occurs, the pulse is excess at all three positions, and the disease is unresolved, the prognosis is poor. (*Nei Jing* states: In Warm Disease, if sweating is thorough but fever returns, the pulse is rapid and restless and does not subside with sweating, there is delirium and inability to eat, this is called "Yin-Yang Intersection," which is fatal.)

In Tai Yang Disease, if initial sweating fails to resolve the disease and purgation is subsequently used, and the pulse remains floating, the disease is not cured. A floating pulse indicates the pathogen is still on the exterior; using purgation against this causes failure to cure. Since the pulse is now floating, we know the pathogen is still on the exterior; one must release the exterior to achieve cure, primarily using Gui Zhi Tang (Cinnamon Twig Decoction).

After sweating and purgation, if headache, fever, epigastric fullness, and dysuria persist, Gui Zhi Qu Gui Jia Fu Ling Bai Zhu Tang (Cinnamon Twig Decoction minus Cinnamon Twig plus Poria and Atractylodes Macrocephala Decoction) is used. (Discussions see Chest Binding section.)
After massive purgation, if body heat persists and there is a knotted pain in the heart region, Zhi Zi Chi Tang (Gardenia and Fermented Soybean Decoction) is the primary formula. (Discussions see Heart section.)
After massive purgation, if body heat persists and there is slight vexation, Zhi Zi Gan Jiang Tang (Gardenia and Dried Ginger Decoction) is used. (Formula discussions see Vexation section.)
In Yang Ming Disease, after purgation, if there is external heat, warm hands and feet, mental anguish (Ao Nao), hunger but inability to eat, and only head sweating, Zhi Zi Chi Tang (Gardenia and Fermented Soybean Decoction) is used. (Discussions see Vexation section.)

In Tai Yang Disease, one should expect aversion to cold and fever. Now, if there is spontaneous sweating, no aversion to cold, fever, and a fine-rapid pulse at the Guan position, this is due to the error of emesis. If emesis was induced on days 1-2, there is hunger in the abdomen but inability to eat; if induced on days 3-4, there is dislike for congee and desire for cold food, with morning food vomited in the evening. These are caused by erroneous emesis and are termed "Minor Deviation" (Xiao Ni). (Cheng Wuji annotation: Aversion to cold and fever are Tai Yang exterior signs. Spontaneous sweating, no aversion to cold, and fever are Yang Ming signs. Originally a Tai Yang exterior disease, the physician erroneously used emesis, damaging Stomach Qi and allowing exterior pathogens to transmit to Yang Ming. The fine-rapid Guan pulse indicates this error. On days 1-2, exterior pathogens were cold and untransformed; emesis transmitted cold to the Stomach, causing deficiency-cold, hence hunger but inability to eat. On days 3-4, exterior pathogens had transformed into heat; emesis transmitted heat to the Stomach, causing deficiency-heat, hence dislike for congee and desire for cold food. Morning food vomited in the evening indicates Stomach deficiency failing to digest food retained over time. This confirms the physician's error. Emesis in Tai Yang is not a deviation per se, but transmission to Yang Ming makes it a deviation. However, since Yang Ming is still a Yang meridian, it is a "Minor Deviation" rather than "Major Deviation.")

If fever recurs after recovery, use Xiao Chai Hu Tang (Minor Bupleurum Decoction). If the pulse is floating, resolve via sweating; if sinking, resolve via purgation. (Detailed discussion see Labor Recurrence section.)

Shang Han with a floating-slippery pulse indicates exterior heat and interior cold; Bai Hu Tang (White Tiger Decoction) is the primary formula. (Previous chapter stated: Heat knotting in the interior with exterior-interior heat uses Bai Hu Tang. Also: If exterior is unresolved, do not give Bai Hu Tang. Here, floating-slippery pulse with exterior heat and interior cold suggests a textual error in "exterior-interior." Another Yang Ming case states: Floating-slow pulse, exterior heat interior cold, uses Si Ni Tang. Another Shao Yin case states: Interior cold exterior heat, uses Tong Mai Si Ni Tang. This clarifies the error. Also, Yang Ming chapter states: Slippery-rapid pulse uses Xiao Cheng Qi Tang, indicating interior heat. Jue Yin chapter states: Slippery pulse with cold limbs indicates interior heat, treated with Bai Hu Tang. This clearly shows slippery pulse indicates interior heat. Moreover, Zhi Mu and Shi Gao are both very cold; how can water be used to extinguish water? Cheng Wuji's interpretation following the text is incorrect.)

**Bai Hu Tang Formula**
Zhi Mu (6 liang), Shi Gao (1 jin), Gan Cao (2 liang), Nu Mi (6 he).
Boil these four ingredients in 10 cups of water until the rice is cooked and the decoction is ready. Strain, take 1 sheng warm, three times daily.

Cheng Wuji annotation: Bai Hu is the Metal Spirit of the West, corresponding to Autumn and belonging to the Lung. For heat severe internally, use cold-purgatives; for heat severe externally, use cooling-resolvers. If there is heat both inside and outside, unable to vent inward or emit outward, this decoction is required to resolve it. Summer heat stops with Autumn air, hence "End of Heat" (Chu Shu). Named Bai Hu (White Tiger) because it can stop heat. *Nei Jing* states: "When heat dominates, assist with bitter-sweet." And: "Heat dominating internally, use bitter to disperse." To thoroughly resolve exterior heat, bitterness is primary; thus, Zhi Mu (bitter-cold) is the Sovereign herb. Heat damages Qi; cold conquers heat, sweetness moderates. To assist in overcoming heat-damaged Qi, use sweet-cold; thus, Shi Gao (sweet-cold) is the Minister herb. Spleen dislikes dampness; urgently eat sweet to moderate. Internal residual heat consumes fluids; use sweet-neutral substances to moderate the middle; thus, Gan Cao and Jing Mi (Rice) are the Envoys. This treats Tai Yang Zhong Shu (Sunstroke). With this decoction, heat is instantly removed, disappearing like the White Tiger. Do not use Bai Hu Tang after Start of Autumn, as it is a major cold agent; Autumn use causes hiccups, deficiency, and emaciation.

Li Dongyuan annotation: The anterior part of the body is the pathway of the Stomach meridian; the chest is the chamber of the Stomach and Lung. Pathogens in Yang Ming constrain the Lung with Fire; thus, pungent-cold herbs clear the Lung, earning the name Bai Hu Tang.

Zhang Yuansu annotation: Exterior syndrome fever, aversion to heat, and thirst in Shang Han are similar to miscellaneous diseases. However, headache, body heat, eye pain, nasal dryness, and insomnia are treated with Bai Hu Tang; this is Yang Ming Meridian disease. Positive Yang Yang Ming Qi disease presents with a洪大 (Huge-Large) pulse, initially formless. Miscellaneous disease interior syndrome fever, aversion to heat, and thirst with red eyes indicate disease in the Zang organs. Insufficiency of Hand Tai Yin Qi fails to manage Yang Qi; treat with Gou Qi, Sheng Di Huang, Shu Di Huang. Pulse huge-large with vomiting blood indicates prior formation of form. Qi disease in the interior misusing Blood medicines addresses An Xue Yi Yin (calming blood and benefiting Yin). Blood disease in the interior misusing Qi medicines like Bai Hu Tang is incorrect, as it clears Lung and damages Yin.

Li Dongyuan discusses complications of mistaken Bai Hu Tang use: Formerly, Ge Junrui suffered Shang Han fever in mid-spring, treated with Bai Hu Tang. His face turned black as ink, original symptoms vanished, pulse became deep-fine, and urination was incontinent. Li Dongyuan initially did not understand, but upon diagnosis said: This was mistaken Bai Hu Tang use before Start of Summer. Bai Hu Tang is major-cold, not a meridian-moving drug; it only freezes the Zang-Fu. Misuse injures beneficial Qi. The original disease hides in the meridians. One might try major-hot drugs to remove Yin pathogens, but other syndromes would arise, failing to rescue the Bai Hu Tang side effects. Use warm drugs to raise Yang and move meridians. Question: How can major-hot drugs rescue major-cold injury? Answer: Disease hides in meridians; if Yang Dao does not rise, meridians do not flow. Once meridians flow, original symptoms reappear. He healed exactly as predicted.

Zhang Yuansu annotation: *Huo Ren Shu* says Bai Hu Tang treats Zhong Shu (Sunstroke) and is merely a post-sweating exterior-resolving agent, not a proper Shang Han drug. Especially in summer, when Yin Qi is internal, Bai Hu Tang should be strictly avoided. Yet Bai Hu Tang is recorded in Zhang Zhongjing's works with clear indications. Why call it improper? *Shang Han Lun* states those without exterior syndrome may receive Bai Hu Tang. Now saying it is merely a post-sweating exterior resolver contradicts the law: if no exterior syndrome exists, what is to be resolved? Also, *Ming Li Lun* states do not use after Start of Autumn. Autumn Yin Qi is half-present; Bai Hu Tang is major-cold. Failure to avoid it causes hiccups, anorexia, or deficiency. Shang Han law dictates treating according to syndrome, not season. If in winter/autumn one has Shang Han without exterior syndrome but with great vexation/thirst, Bai Hu Tang is indicated. Clinging to season prevents treatment. If Bai Hu Tang is major-cold, why use Cheng Qi in winter? If summer avoids it and autumn forbids it, when is it suitable? Although *Jing* says respect seasonal Qi and do not violate Heaven's Harmony, this is the general rule. If treacherous pathogens cause abnormal Yin-Yang/Cold-Heat, one must abandon season for syndrome.

Shang Han with floating pulse, fever, no sweat, and unresolved exterior cannot receive Bai Hu Tang. If there is great thirst for water and no exterior syndrome, Bai Hu Jia Ren Shen Tang (White Tiger Plus Ginseng Decoction) is primary. (Cheng Wuji annotation: Floating pulse, fever, no sweat, unresolved exterior without thirst suits Ma Huang Tang; with thirst suits Wu Ling San, not Bai Hu Tang. Great thirst for water without exterior syndrome allows Bai Hu Jia Ren Shen Tang to scatter interior heat. Clinicians must distinguish carefully. Zhang Yuansu annotation: Classics say "may give" or "do not give" to set rules for disease defense; "suitable for" implies clinical judgment; "primary formula" implies targeted treatment. These three are method categories containing deep principles, not fully explicable in one sentence.)

Floating-slow pulse, exterior heat interior cold, diarrhea with undigested food: Si Ni Tang (Frigid Extremities Decoction). (Discussions see Diarrhea section.)
Diarrhea, cold limbs, sweating, persistent heat: Si Ni Tang.

Shao Yin Disease with diarrhea, undigested food, cold limbs, interior cold exterior heat: Tong Mai Si Ni Tang (Pulse-Recovering Frigid Extremities Decoction). (Formula discussions see Diarrhea section.)
Body heat, cold limbs, deficient pulse, occurring in summer: Zhong Shu (Sunstroke). (Discussions see Sunstroke section.)
Shang Han with unresolved exterior, dry retching, fever, cough, diarrhea: Xiao Qing Long Tang minus Ma Huang plus Yuan Hua (Genkwa). (Discussions see Cough section.)
Tai Yang and Yang Ming Combined Disease with inevitable diarrhea, headache, back pain, body heat, nasal dryness, floating-large-long pulse: Ge Gen Tang (Kudzu Decoction). (Discussions see Combined Disease section.)
Fever, diarrhea, micro-slow pulse, cold limbs: Tong Mai Si Ni Tang.
Tai Yang and Shao Yang Combined Disease with spontaneous diarrhea, cold head, chest fullness, alternating chills/fever, floating-large-wiry pulse: Huang Qin Tang (Scutellaria Decoction). (Discussions see Combined Disease section.)
Diarrhea with undigested food, deep-slow pulse, red face, slight heat, cold limbs: Must have Yu Mao (depression/dizziness) with sweating for self-resolution. Fever, diarrhea, cold limbs, restlessness, inability to lie down: Poor prognosis.
Fever with diarrhea and incessant sweating: Poor prognosis. (Both discussions see Diarrhea section.)

Fever, vomiting/diarrhea, epigastric stiffness: Da Chai Hu Tang (Major Bupleurum Decoction). With thirst: Wu Ling San (Five-Ingredient Powder with Poria). Without thirst: Li Zhong Tang (Regulate the Middle Decoction). (Discussions see Epigastric Fullness and Vomiting/Diarrhea sections.)

Fever with menstruation arriving or stopping: Xiao Chai Hu Tang (Minor Bupleurum Decoction) and puncture Qi Men (Liver 14). (Discussions see Delirium/Malaria-like Symptoms section.)
Fever, rapid pulse, excessive digestion, constipation: Blood stasis; Di Dang Tang (Assault the Accumulation Decoction) is appropriate. (Discussions see Blood Accumulation section.)

Dai Yuanli annotation: All Yang meridians show fever as seen in the Three Yang. Yin meridians do not show fever, except Shao Yin. However, Shao Yin fever has two patterns: Immediate Shao Yin syndrome with fever, aversion to cold, no headache: Ma Huang Xi Xin Fu Zi Tang (Ephedra, Asarum, and Aconite Decoction). If diarrhea with undigested food, body heat, restlessness, interior cold exterior heat: Zhang Zhongjing calls this "Counter Fever," caused by Yin excess repelling Yang; use Si Ni Tang or Fu Zi Li Zhong Tang. Generally, Yang Qi transmitting to Yin meridian causing diarrhea is Heat Diarrhea (Yang sinks inside, so no external heat). Yin Qi entering Yin meridian causing diarrhea is Interior Cold Self-Draining. Cold dominates inside, so Yang guests outside, causing external heat. Know that Yin syndrome fever is different. Fever originating in Yang causes headache; fever originating in Yin does not cause headache; this is a verification.
Also, after sweating, only aversion to cold indicates deficiency (Exterior Deficiency). After sweating, only aversion to heat indicates excess (Interior Excess). Only aversion to cold results from excessive sweating ("Yang Micro leads to aversion to cold"); use Shao Yao Gan Cao Fu Zi Tang (Peony, Licorice, and Aconite Decoction). Only fever indicates exterior resolved but interior not cleared ("Yin Micro leads to fever"); use Da Chai Hu Tang or Xiao Cheng Qi Tang.
After sweating and purgation, if Yin-Yang do not enter each other and Water-Fire do not harmonize, leaving residual heat, do not use cold drugs; neither interior nor exterior is ready, so use Xiao Jian Zhong Tang (Minor Construct the Middle Decoction). If the person is already deficient, deficiency generates heat; use Xiao Jian Zhong Tang plus Dang Gui (Angelica Sinensis) or Si Jun Zi Tang (Four Gentlemen Decoction) plus Huang Qi (Astragalus), or Shi Quan Da Bu Tang (Comprehensive Great Tonifying Decoction) to harmonize Ying-Wei. For deficiency, use Si Zhu Tang or Zhen Wu Tang. If determining it is unresolved pathogenic heat, despite sweating/purgation, do not fear deficiency but nourish the disease; use Zhu Ye Shi Gao Tang (Bamboo Leaf and Gypsum Decoction).

Song-Yuan Experts' Treatment Examples for Exterior Fever

Jiegu annotation: Those with sweat should not take Ma Huang; those without sweat should not take Gui Zhi. However, in Spring/Summer, pores are loose; even with sweat, Gui Zhi is inappropriate; use Huang Qi Tang (Astragalus Decoction) to harmonize. In Autumn/Winter, pores are closed; even without sweat, Ma Huang is inappropriate; use Chuan Xiong Tang (Ligusticum Decoction) to harmonize. Spring/Summer with sweat, micro-weak pulse, aversion to wind/cold: Tai Yang syndrome with Autumn/Winter pulse; use Huang Qi Tang. Without sweat, also use Chuan Xiong Tang. Autumn/Winter with sweat, strong-floating pulse, fever, aversion to heat: Yang Ming syndrome with Spring/Summer pulse; use Huang Qi Tang. Without sweat, also use Chuan Xiong Tang. Generally, with sweat suit Huang Qi Tang; without sweat suit Chuan Xiong Tang.

**Huang Qi Tang**: Stops sweat.
Bai Zhu, Huang Qi, Fang Feng (equal parts). Crush, take 5-7 qian to 1 liang, decoct in water, take warm. If sweat is profuse with severe aversion to wind, add Gui Zhi.

**Chuan Xiong Tang**: Releases sweat.
Chuan Xiong, Cang Zhu, Qiang Huo (equal parts). Crush, take 5-7 qian to 1 liang, decoct in water, take hot. If no sweat with severe aversion to wind, add Ma Huang 1-2 qian.

Zhang Yuansu annotation: Shen Shu Tang: Treats internal injury from cold drinks and external cold pathogen without sweat.
Zhi Cang Zhu, Fang Feng (2 liang each), Chao Gan Cao (1 liang). Crush, decoct with Cong Bai (Green Onion White) and Sheng Jiang (Fresh Ginger). If Tai Yang syndrome with fever, aversion to cold, floating-tight pulse, add Qiang Huo 2 qian. If floating-tight with wiry-rapid pulse, combined Shao Yang, add Chai Hu 2 qian. If floating-tight with surging pulse, combined Yang Ming, add Huang Qin 2 qian. For women, add Dang Gui, or Mu Xiang Tang, or Gao Ben Tang 2 qian each. For mastitis, mix Liu Yi San 3-5 qian, miraculous effect.
Six Qi Additions/Subtractions for Shen Shu Tang:
Tai Yang Han Shui Si Tian: Add Qiang Huo, Gui Zhi. Other years with abnormal cold also add. Winter also add.
Yang Ming Zao Jin Si Tian: Add Bai Zhi, Sheng Ma. Other years with abnormal cool/damp also add. Autumn also add.
Shao Yang Xiang Huo Si Tian: Add Huang Qin, Di Huang. Other years with abnormal rain/damp also add. Summer also add.
Tai Yin Shi Tu Si Tian: Add Bai Zhu, Gao Ben. Other years with abnormal heat/damp also add. Late Summer/Early Autumn also add.
Shao Yin Jun Huo Si Tian: Add Xi Xin, Du Huo. Other years with abnormal heat also add. Late Summer/Early Summer also add.
Jue Yin Feng Mu Si Tian: Add Chuan Xiong, Fang Feng. Other years with abnormal mild/warm also add. Summer also add.
These Six Qi additions/subtractions are not only for Si Tian Qi. They apply to Year Master Qi, Month, Day, and Hour correspondences. See Zhang Yuansu's theory with Dai Yuanli's "If the disease does not match the current year's Qi, find which year's Qi matches and seek treatment here." This reveals the essence of *Zhi Zhen Yao Da Lun*. Their theory on exterior-interior development surpasses predecessors. Zhang Yuansu's "Add herb for Si Tian Qi" treats Constant Qi; "Add/Subtract based on appearance" treats Variable Qi. Dai Yuanli's "Match year Qi" also treats Variable Qi. Expanding these methods clarifies *Nei Jing*运气 (Yun Qi) principles. Yun Qi has Constant Qi (fixed cycles, e.g., certain years cold/hot) and Variable Qi (no fixed cycle, e.g., expected cold turns hot). Wang Shi's commentary confused Variable Qi with Constant Qi, causing students to rely on year prediction with low accuracy, leading to loss of faith and obscurity of the doctrine. These two scholars revived it after millennia, akin to Cheng-Zhu reviving Confucius-Mencius. I respectfully clarify the meaning of Variable Qi after Haizang's annual additions for colleagues to study.

**Bai Zhu Tang**: Treats internal injury from cold food and external wind-cold with sweat.
Bai Zhu (3 liang), Fang Feng (2 liang), Zhi Gan Cao (1 liang). Crush, take 5 qian, 1 cup water, 3 slices ginger, boil to 70%, take warm. 1-2 times daily. Wait 2-3 days for gradual reduction of sweat as resolution.

**Another Bai Zhu Tang**: Treats Shang Han by resolving Three Yang above and calming Tai Yin below.
Bai Zhu (use Cang Zhu if sweating), Fang Feng (2 liang each). Take 5 qian, decoct to 70%, take warm. Modify as follows:
If fever with thirst, add Huang Qin Gan Cao; headache/aversion to wind, add Qiang Huo San 3 qian (Qiang Huo 1.5 liang, Chuan Xiong 7 qian, Xi Xin 2.5 qian, remove roots).
If body heat/eye pain, add Shi Gao Tang 4 qian (Shi Gao 2 liang, Zhi Mu 0.5 liang, Bai Zhi 7 qian).
If abdominal pain, add Shao Yao Tang 3 qian (Shao Yao 2 liang, Gui Zhi 0.5 liang).
If alternating chills/fever with vomiting, add Chai Hu San 3 qian (Chai Hu 1 liang, Ban Xia 0.5 liang).
If epigastric fullness, add Zhi Shi 1 qian.
If interior syndrome exists, add Da Huang 1 qian, then 2 qian, then 3 qian; stop when pathogen is gone.

Jiegu stated: No Ma Huang with sweat; no Gui Zhi without sweat. If unresolved, variations are countless. Thus, this method avoids Three Yang taboos, a divine exterior-resolving formula.

**Jiu Wei Qiang Huo Tang**: (Tao Shangwen annotation: Regardless of season, if headache, bone/joint pain, fever, aversion to cold, no sweat, floating-tight pulse exist, use this instead of Ma Huang for stability. If headache, fever, aversion to wind, spontaneous sweat, floating-slow pulse, use Modified Chong He Tang, i.e., Qiang Huo Tang minus Cang Zhu/Xi Xin plus Bai Zhu/Huang Qi.)