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Those who treat *Shanghan* (Cold Damage) often mistakenly apply treatments for *Wenre* (Warm-Heat diseases), and those who treat *Wenre* often mistakenly apply treatments for *Shanghan*; this is due to unclear differentiation. Even if it is clearly identified as a *Wenre* disease, there are differences between *Xingan* (Newly Acquired/Immediate Onset) and *Fuqi* (Latent Pathogen). The predecessors elucidated theories on *Xingan Wenre*, such as Ye Tianshi's (Ye Xiangyan) "Twenty Rules on Warmth," Chen Pingbo's "Chapter on Wind-Warmth Disease," Wu Jutong's "Systematic Identification of Warm Diseases," and Zhang Fengkui's "Complete Book on Treating Summerheat." Their theories were not imprecise or undetailed, yet they were all established for *Xingan Wenshu* (Newly acquired warmth and summerheat), not for *Fuqi Wenre*. Even the chapter on Damp-Warmth by Xue Shengbai, included in Jiang Benzai's collection, belongs to a type where summerheat and dampness struggle with each other. Others, such as Zhang Shiwen's "Introduction to Shanghan," Zhou Yucai's "Complete Book on Warmth, Heat, Summerheat, and Epidemics," and Chen Suzhong's "Differentiation of Cold and Warmth," although clarifying *Fuqi Wenre*, unfortunately remain vague and undetailed. In my opinion, the first book to specifically discuss *Fuqi Wenre* with precision regarding various symptoms is Mr. Beishan's work. Here, I first present its general theory, preserving its essence and supplementing its deficiencies, totaling thirteen points.

*Wenre* is a *Fuqi* disease, commonly referred to as *Fuxie* (Latent Pathogen). Its onset often occurs triggered by a new external contraction, known as "new pathogen activating latent pathogen." When triggered by wind pathogen, it is called *Fengwen* (Wind-Warmth) or *Fenghuo* (Wind-Fire). When triggered by cold pathogen, it is called *Lengwen* (Cold-Warmth) or *Ke Han Bao Huo* (External Cold Enveloping Fire). When triggered by summerheat pathogen, it is called *Shuwen* (Summerheat-Warmth) or *Shure* (Summerheat-Heat). When triggered by dampness pathogen, it is called *Shiwen* (Damp-Warmth) or *Shi E Re Fu* (Dampness Suppressing and Heat Lying Hidden). If complicated by foul toxins, it is called *Wendu* (Warm-Toxin); its symptoms are of two types: one is *Fengwen Shidu* (Wind-Warmth Seasonal Toxin), and the other is *Shiwen Shidu* (Damp-Warmth Seasonal Toxin). This distinguishes disease names based on accompanying symptoms. Those occurring in spring are called *Chunwen* (Spring-Warmth) or *Chunshi Wanfa* (Late Onset in Spring). Those occurring in summer are called *Xiawen* (Summer-Warmth) or *Rebing* (Heat Disease). Those occurring in autumn are called *Qiuwen* (Autumn-Warmth) or *Qiushi Wanfa* (Late Onset in Autumn), or *Fushu* (Latent Summerheat). Those occurring in winter are called *Dongwen* (Winter-Warmth) or *Fushu, Dongfa* (Latent Summerheat, Winter Onset). This distinguishes disease names based on seasonal timing. The disease germinates in spring, flourishes in summer, peaks in autumn, and declines in winter; occasionally it may peak in spring and winter, but generally, it peaks most frequently in summer and autumn.

Why? In spring and winter, the air is clean, with more light/clear qi and less heavy/turbid qi; thus, the pathogens are mostly clear and few turbid ones. Apart from *Xingan* symptoms, even if illness arises from *Fuqi*, pure heat without cold is merely *Wenbing* (Warm Disease); accompanied by cold is merely *Lengwen*; accompanied by wind is merely *Fengwen*. Although occasionally there are epidemic *Wendu*, wind toxin predominates. In summer and autumn, the air is most turbid; the stagnant and steaming qi of water and soil is often attracted and evaporated by sunlight. Occurring in early summer, it is called *Meiyu Zheng* (Moldy Rain Steaming); occurring in mid-autumn, it is called *Guihua Zheng* (Osmanthus Flower Steaming). The resulting illness is formed by a mixture of turbid foul qi from water and soil. People tend to generalize the root of the disease as summerheat-dampness and the manifestation as greed for coolness and drinking cold substances. They do not realize that in summer and autumn, the stagnant steaming of water and soil means dampness contains heat, and heat contains dampness; the turbid heat is sticky and greasy, generating mold spores. Hence it is called *Shiwen* (Damp-Warmth) or *Shiqi* (Damp-Heat); Western medicine calls it *Meidu Was* (Mold Toxic Gas). It harms the most people, produces the most complex variations, and is far more numerous and difficult to treat than *Fengwen*, *Lengwen*, and *Shuwen*.

British physician Hobson stated: Dry-hot air does not harm people; only damp-heat harms people most. This is because low-lying land may harbor latent heat from stagnant water, or accumulate rotting vegetation (this is the cause of water-soil foul qi generating mold spores). Later, exposed to sunlight at sixty degrees [temperature], causing the mold toxic gas to erupt vigorously. Therefore, in the hot regions of the southeast, during the transition between summer and autumn, the toxicity is particularly severe. This shows that *Shiwen* and *Shiqi* are tangible, sticky, and greasy pathogens; Western medicine has some insight into this. Alas! Humans exist within the intersection of qi; our vital qi struggles daily against foul qi, which is essentially a struggle against microorganisms. Unknowingly, we harbor many dangerous mechanisms; can we not be alarmed and fearful?