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Treating Taiyang disease (a syndrome caused by pathogenic factors invading the Taiyang channel), characterized by fever and aversion to cold, with heat predominating over cold, and a faint pulse. This condition is referred to as "Wu Yang" (here indicating depletion of Yang Qi and body fluids, rather than pure Yang deficiency), and diaphoresis (sweating therapy) is contraindicated.

Gui Zhi Tang (Cinnamon Twig Decoction) two parts, Yue Bi Tang (Yuebi Decoction) one part, combined and decocted to yield two sheng (approx. 400ml). Take one sheng warm.

Gui Zhi Ma Huang Ge Ban Tang (Guizhi Mahuang Half-and-Half Decoction) assists righteous Qi to expel pathogens, inducing mild diaphoresis. When Taiyang disease resembles malaria, even if the pulse is faint, if there is excess heat and no sweat, dispersal is still required. (Taiyang disease resembling malaria with a faint pulse indicates deficiency of both Yin and Yang; sweating, vomiting, and purging are all prohibited. However, when heat exceeds cold, the face has a hot color, the body has no sweat, and the skin itches as if insects were crawling under the skin, it is due to pathogenic factors stagnating in the exterior, attempting to exit but unable to do so. Although the faint pulse prohibits strong sweating, the presence of excess heat and anhidrosis necessitates some form of sweating. Thus, this method is established. The power to assist righteous Qi equals the power to scatter pathogens; only mild sweating should be achieved to avoid the risk of massive sweating leading to collapse of Yang.) Why does wind malaria belong to the Taiyang channel? Because its episodes occur without interruption. (Taiyang disease resembling malaria occurs two or three times a day, unlike Shaoyang malaria which occurs once a day. Since wind pathogenic factors lodge in the skin, wanting to exit but unable to, the onset and cessation are irregular, hence later generations named it "Wind Malaria".) There is also Gui Zhi Er Yue Bi Yi Tang (Guizhi Two-Yuebi One Decoction), whose main indications are slightly different. This is because the patient has sweat, so the dosage of Gui Zhi is higher, making the dispersing action more gentle. (This concept is similar to Gui Zhi Ma Huang Ge Ban Tang. However, this formula is used after profuse sweating, hence Gui Zhi is slightly heavier and Ma Huang is slightly lighter.) As for the method of Gui Zhi Er Yue Bi Yi Tang, it applies to cases where constitution is weak and pathogenic factors are also slight. "Wu Yang" refers to the loss of fluids in the Yang aspect; the meaning of faint pulse and excess heat should be carefully considered. (This "Wu Yang" differs from "Wang Yang" [collapse of Yang]. "Wu Yang" here means the loss of fluids in the Yang aspect. Generally, the person is not robust, and the pathogenic factor is light, resulting in alternating chills and fever with a faint pulse. If forced sweating is applied, it will inevitably lead to complications such as crossing hands over the heart and palpitations below the umbilicus. Therefore, two-fourths of Gui Zhi Tang is used to circulate Yang Qi, and one-fourth of Yue Bi Tang is used to circulate Yin fluids. Circulating Yin fluids means stimulating Pi Qi (Spleen Qi) to transport fluids in the Stomach, thereby harmonizing Yang, generating fluids, restoring the pulse, and allowing resolution through mild sweating. Generally, for acute febrile diseases, even if the pulse is weak, treatment should follow external contraction principles; for chronic diseases with a weak pulse, even if heat is severe, treatment should follow internal injury principles. This is the key point. You Zaijing in *Shanghan Guan Zhu Ji* stated: [When Gui Zhi Tang] is combined with Ma Huang, it can fully utilize the efficacy of Ma Huang while removing its harshness; when used with Shi Gao (Gypsum Fibrosum), it can augment the benefits of Shi Gao without disrupting the balance of powers. Although Ma Huang and Shi Gao are used together, Gui Zhi is actually the principal herb, because without nourishing Ying Wei (Nutritive and Defensive Qi), there would be no basis for inducing sweating to expel pathogens. For cases where righteous Qi is insufficient, pathogenic factors are slight, yet resolution still requires sweating, one should refer to these three formulas.) Later generations failed to fully utilize the functions of Gui Zhi and instead sought herbs like Ren Shen (Ginseng Radix), Dang Gui (Angelicae Sinensis Radix), and Di Huang (Rehmanniae Radix). While the intent was similar, the medication differed significantly."