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The *Neijing* states that all febrile diseases belong to the category of Shanghan (Cold Damage), not meaning they are similar to Shanghan, but that they belong to the same class of diseases. Generally, Shanghan is named so because it results from injury by the cold of the season; Wenbing (Warm Disease) and Rebing (Febrile Disease) also change their names according to the season! The classics state: "If injured by cold in winter, one will develop a febrile disease"; this refers to illness occurring at the time of injury. The classics further state: "If injured by cold in winter, one will inevitably develop Wenbing in spring"; this refers to illness occurring after the season has passed. The classics also state: "For those whose cold injury transforms into warmth, if it occurs before the Summer Solstice, it is called Wenbing; if after the Summer Solstice, it is called Shubing (Summer Heat). Shu is synonymous with heat." This also refers to illness occurring at the time of injury. Therefore, before the Autumn Equinox, all can be named Rebing; after the Autumn Equinox, all can be named Shanghan. This is how Huangdi, Qibo, and Zhang Zhongjing established the nomenclature for Shanghan, Wenbing, and Rebing. The classics further say: "Those who store essence will not suffer from Wenbing in spring," clarifying the reason for not falling ill after the season passes. The classics state: "If one fails to store essence in winter, one will inevitably suffer from Wenbing in spring," clarifying the cause of inevitable illness after the season passes. From this, we can understand that for Shanghan, the illness does not depend on whether essence is stored or not; contracting the pathogen is sufficient to cause disease. It is not like Wenbing and Rebing, where storing essence prevents illness, and failing to store essence guarantees illness. Those who can store essence, even if occasionally exposed to pathogens, whether warm or summer-heat, will naturally have milder illness; those who cannot store essence, even if slightly exposed to pathogens, whether warm or summer-heat, will inevitably have severe illness, differing only slightly. If one specifically regards "failure to store essence in winter" without any external contraction as the root disease of Shaoyin, with heat arising internally, this would contradict Zhang Zhongjing's principles regarding Wenbing. In his discussions, Zhang Zhongjing only states that when Taiyang disease first appears, characterized by fever, thirst, and aversion to cold absence, it is called Wenbing. This distinguishes it from Shanghan; it does not mean that the cold of Taiyang does not enter from the exterior, but rather arises as internal heat from Shaoyin. The classics further state: "In Fengwen disease, the pulse is floating at both Yin and Yang positions." This clearly indicates that the onset of Wenbing is triggered by feeling spring wind, which stirs up internal heat, causing both Yin and Yang pulses to float. Essentially, the discussions on Wenbing, Fengwen, and Rebing mutually elucidate their meanings. However, the discussion on Rebing is already clear in the classics; establishing another theory would be redundant. This is not because Zhang Zhongjing detailed Shanghan while neglecting Wenzheng, but rather... [Text continues] Now, Fusqi (Latent Qi), Wenbing, and Fengwen are combined into one chapter. Their treatment methods for warmth and heat follow the Six Channels. Readers should carefully study the *Suwen: Rebing Lun*, as well as the *Cire* and *Pingre* chapters, and cross-reference them with this discussion to gain understanding.

The Master said: Fusqi disease requires careful observation and intuition. Within the current month, if one suspects latent qi, and if the patient has a history of latent qi, pulse diagnosis is necessary. If the pulse is weak and faint, there should be throat pain, resembling an injury, but it is not Houbi (sore throat with swelling and obstruction). The patient reports: "Indeed, there is severe throat pain." Even so, there may now be a desire for diarrhea.

[Annotation]
The normal climate of the four seasons is Zhengqi (Upright Qi); abnormal climate is Xieqi (Pathogenic Qi). Zhengqi invades shallowly; severe exposure causes immediate illness, while mild exposure hides in the skin and muscles without immediate illness, and robust individuals may recover spontaneously. Xieqi invades deeply; even mild exposure causes immediate illness, and severe cases penetrate directly into the Zang organs without spontaneous recovery, leading to death in deficient individuals. The Fusqi disease mentioned in this chapter refers to illness caused by the normal seasonal qi, not by abnormal seasonal pathogens or epidemic qi. Regarding Fusqi, for example, if one contracts winter wind-cold, severe cases injure Ying and Wei, manifesting immediately as Zhongfeng (Wind Strike) or Shanghan; mild cases lie dormant in the skin and muscles, manifesting later as Wenbing. Thus, illnesses caused by Shiqi (Seasonal Qi) and Fusqi must be distinguished. The three months of spring are called Facen (Sprouting and Growing), the month when Fusqi is about to emerge. If a person with old Fusqi takes advantage of the gap caused by winter failure to store essence, pulse identification is required. Within this month, for initial Shanghan or Wenbing, if the pulse is weak and faint, it is the Shaoyin pulse; if there is throat pain, it is a Shaoyin syndrome. However, the pain must be gradual, unlike the sudden, severe pain of Houbi caused by external seasonal qi. Since the patient reports severe throat pain yet the pulse is weak and faint, it is known as Yin fire arising from internal Shaoyin Fusqi. Although there is throat pain, diarrhea may follow; it should not be treated as Houbi caused by external Yang fire of seasonal qi.

[Collected Annotations]
Zhang Xiju states: This clause discusses Fusqi disease, which emerges from within, unlike epidemic acute diseases that arrive from outside.

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Taiyang disease, characterized by fever, thirst, and absence of aversion to cold, is called Wenbing. After sweating therapy, if the body becomes burning hot, it is called Fengwen. In Fengwen disease, the pulse is floating at both Yin and Yang positions; there is spontaneous sweating, heaviness of the body, excessive sleepiness, snoring nasal breathing, and difficulty speaking. If purgation is applied, there will be difficulty urinating, fixed staring gaze, and incontinence of urine and feces; if fire therapy is applied, slight jaundice may appear, and in severe cases, symptoms resemble epilepsy with occasional convulsions; if moxibustion/fire fumigation is used, one error may prolong the illness, but two errors will hasten death.

[Annotation]
Fever without thirst and with aversion to cold is a Taiyang syndrome. Fever with thirst and without aversion to cold is a Yangming syndrome. Now, in the initial stage of Taiyang disease, without waiting for cold pathogen to transform into heat and transfer to Yangming, the immediate appearance of fever, thirst, and absence of aversion to cold indicates this is not Taiyang Shanghan, but Taiyang Wenbing. This is due to wealthy individuals failing to store essence in winter, or laborers contracting cold in winter, leading to internal Yin deficiency and external Yang constraint. The meridians throughout the body have already undergone warming transformation. Thus, upon encountering external pathogens in spring, they respond internally: those contracting cold have no sweat, named Wenbing, and should be treated with Hejian's method using Shuijie San (Water Dissolving Powder), analyzing the exterior and interior to resolve it. Shuijie San is a combination of Tianshui Liuyisan (Heavenly Water Six-One Powder) and Fangfeng Tongsheng San. Those contracting wind have sweat, named Fengwen, and should be treated with Shuijie San minus Mahuang, plus Guizhi, doubled Baishao (Note: Text says Baishi/Gypsum context implies modified formula, actually text says add Guizhi, double Shigao/Gypsum), to induce slight sweating for harmonization. Excessive sweating will exacerbate retained heat, causing body heat like burning fire. Generally, in Fengwen, wind pathogen is abundant externally, causing floating pulses at all six positions; heat pathogen obstructs internally in the chest, causing sleepiness and snoring. Wind damages Wei, failing to secure the exterior, causing spontaneous sweating; intense heat damages Qi, causing heaviness, fatigue, weak voice, and difficulty speaking. If purged, Yin fluids are further depleted, causing dryness and urinary difficulty. Taiyang Fu Qi is nearing exhaustion, causing fixed gaze. Shaoyin Zang Qi is insecure, causing incontinence. If fired, fire adds to fire, scorching Yang Qi, leading to jaundice; slight jaundice appears. Severe cases generate wind from extreme heat, resembling epilepsy with convulsions. Slight yellow resembles fire-scorched color. Wenbing and Rebing without aversion to cold indicate exterior heat. Thirst indicating drinking indicates interior heat. Exterior heat without cold makes sweating inappropriate; interior heat without excess makes purging inappropriate. Exterior and interior heat together make fire therapy especially inappropriate. "One error" refers to sweating, purging, or fire therapies; "two errors" refers to sweating followed by purging, or purging followed by fire. One error depletes Yin, allowing time to pass; two errors cause immediate Yin loss, hence "hastening death." Shanghan is injury by the proper cold of winter. Wenbing and Rebing are injuries by violent cold of the other three seasons. Violent cold out of season is Yi Qi (Abnormal Qi), combining with seasonal Qi to cause disease. Spring combines with wind-warmth, named Fengwen; summer combines with summer-heat, named Shure. People generally call it Shanghan or Shiqi. Physicians see its transmission through Six Channels and identical exterior-interior conditions, thus treating it uniformly. For Wenbing/Rebing without sweat, Da Qinglong Tang is suitable; for intermittent sweat, Guizhi Er Yuebiyi Tang is suitable; for those with sweat, Guizhi combined with Baihu Tang is suitable. For internal heat, Fangfeng Tongsheng San is suitable. For exterior excess, double Mahuang; for interior excess, double Dahuang. Adjust dosage based on severity. Before three days, recovery is certain. For those with heavy external pathogens and early internal Yin injury, unresponsive to sweating/purging, analyze exterior-interior and treat according to transmission patterns. This method is effective year-round in Western and Northern regions. In warmer Jianghuai regions, it is applicable only in early winter/spring. In late spring/early autumn, even if pulse/symptoms match indications for Mahuang, Guizhi, Qinglong formulas, dosages must be reduced, adjusted to symptoms, and stopped promptly. Overuse leads to adverse changes. This exemplifies "treating same disease differently."

[Collected Annotations]
Cheng Zhi states: Wenbing heat arises from within, causing fever, thirst, and no aversion to cold. Fengwen involves internal and external heat combined with spontaneous sweating, leading to heaviness and sleepiness, with variations in severity and outcome. Physicians must distinguish between sweating and non-sweating as key diagnostic criteria, determining appropriate use of sweating therapy. He adds: Zhang Zhongjing's Qinglong and Baihu formulas are divine. Extending this principle allows infinite application. Wenbing benefits from dispersing with heavy cooling; Fengwen should not have heavy dispersing added to cooling.

Cheng Yingmao states: On the first day of Taiyang disease, immediate fever, thirst, and no aversion to cold occur because pathogens were already stored internally. External contraction at Taiyang is merely the onset. Internal heat accumulation is not sudden. Since winter failure to store essence and cold injury, Kidney Yin was already deficient. Upon spring Yang heating, even before illness manifests, meridians are filled with Yang excess and Yin deficiency. "Wenbing emerging in spring" originates from embryonic constitution.

Phonetics
Han sounds like Han (snore)
Xian sounds like Xian (epilepsy)
Chi sounds like Chi (convulsion)
Zong sounds like Zong (convulsion)