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Yijian Rensu Yin (Easy-Standard Ginseng and Perilla Decoction) treats febrile diseases caused by cold invasion with fever and headache, or heat resembling shaoyang syndrome due to phlegm-fluid retention.
Qianhu (Peucedani Radix), Renshen (Ginseng Radix et Rhizoma), Zisu (Perillae Folium), Gange (Puerariae Lobatae Radix), Banxia (Pinelliae Rhizoma), Fuling (Poria), each 3 fen; Zhike (Aurantii Fructus Immaturus), Chenpi (Citri Reticulatae Pericarpium), Gancao (Glycyrrhizae Radix et Rhizoma), Jiegeng (Platycodonis Radix), Muxiang (Aucklandiae Radix), each half qian.
The above herbs are cut into small pieces, five slices of Shengjiang (Zingiberis Rhizoma Recens) are added, and the mixture is decocted in water for oral administration.

Renshen Baidu San (Ginseng Toxin-Resolving Powder) (Formula see Cough Section).
Note: These two formulas follow the example of Chaihu (Bupleuri Radix) from the Shaoyang channel (Lesser Yang).
The explanation of Rensu Yin can be found in the Phlegm-Fluid Section.

Jufang Chaihu Shengma Tang (Official Formulation Bupleurum and Cimicifuge Decoction) treats fever, headache, aversion to wind, body pain, cold sensation in the nose, dry throat, and profuse phlegm (Formula see Wind-Injury Section).
Note: This formula involves herbs belonging to the Shaoyang (Lesser Yang), Yangming (Greater Yang), and Taiyin (Greater Yin) channels.

Gegen Jiexi Tang (Kudzu Root Muscle-Releasing Decoction) treats fever, aversion to cold, headache, and stiffness of the neck and back, applicable to Shanghan (Cold Damage) and Wenbing (Warm Diseases).
Gegen (Puerariae Lobatae Radix, 4 qian), Gui (Cinnamomi Ramulus, 1 qian), Huangqin (Scutellariae Radix), Gancao (Glycyrrhizae Radix et Rhizoma), Baishao (Paeoniae Radix Alba), each 2 qian; Mahuang (Ephedrae Herba, 3 qian).
The above herbs are cut into small pieces, Shengjiang (Zingiberis Rhizoma Recens) and Dazao (Jujubae Fructus) are added, and the mixture is decocted.
Note: This formula involves herbs belonging to the Taiyang (Greater Yang), Yangming (Greater Yang), and Taiyin (Greater Yin) channels.

Zhimu Gegen Tang (Anemarrhenae and Kudzu Root Decoction) treats body heat, headache, applicable to Fengwen (Wind-Warmth) and Wendu (Warm-Toxic) syndromes.
Zhimu (Anemarrhenae Rhizoma, 1.5 qian), Gegen (Puerariae Lobatae Radix, 4 qian), Shigao (Gypsum Fibrosum, 3 qian), Gancao (Glycyrrhizae Radix et Rhizoma), Muxiang (Aucklandiae Radix), Shengma (Cimicifugae Rhizoma), Huangqin (Scutellariae Radix), Nanting (Arisaematis Rhizoma Preparatum), Renshen (Ginseng Radix et Rhizoma), Fangfeng (Saposhnikoviae Radix), Xingren (Armeniacae Semen Amarum), Chuanxiong (Ligustici Chuanxiong Rhizoma), Qianghuo (Notopterygii Rhizoma et Radix), each 1 qian; Weirui (Polygonati Odorati Rhizoma, 2.5 qian); Mahuang (Ephedrae Herba, 2 qian).
The above herbs are cut into small pieces, divided into two doses, Shengjiang (Zingiberis Rhizoma Recens) is added, and the mixture is decocted.
Note: This formula involves herbs belonging to the Taiyang (Greater Yang), Yangming (Greater Yang), and Taiyin (Greater Yin) channels. The above three formulas all follow the principles of the Taiyang channel.

Hejian Liushen Tongjie San (Hejian Six-Efficacy Unblocking-Decoction Powder) treats fever, headache, thirst, body pain, surging pulse, and absence of sweating.
Mahuang (Ephedrae Herba, 2 qian), Gancao (Glycyrrhizae Radix et Rhizoma, 3 qian), Shigao (Gypsum Fibrosum), Huashi (Talcum), Huangqin (Scutellariae Radix), each 4 qian; Cangzhu (Atractylodis Rhizoma, 8 qian).
The above herbs are cut into small pieces, Shengjiang (Zingiberis Rhizoma Recens) and Congbai (Allii Fistulosi Bulbus) are added, and the mixture is decocted.
Note: This formula involves herbs belonging to the Three Yang channels and the Hand-Foot Taiyin channels, derived from the Taiyang channel variations.

Yilao Jiuwei Qianghuo Tang (Master Yi's Nine-Ingredient Notopterygium Decoction) treats fever, aversion to cold, absence of sweating or spontaneous sweating, headache, stiffness of the neck, or cases where Shangfeng (Wind-Injury) presents with Hanmai (Cold Pulse) and Shanghan (Cold Damage) presents with Fengmai (Wind Pulse); it is suitable for all such conditions.
Qianghuo (Notopterygii Rhizoma et Radix), Fangfeng (Saposhnikoviae Radix), Cangzhu (Atractylodis Rhizoma), each 1.5 qian; Chuanxiong (Ligustici Chuanxiong Rhizoma), Baizhi (Angelicae Dahuricae Radix), Shengdihuang (Rehmanniae Radix Recens), Huangqin (Scutellariae Radix), Gancao (Glycyrrhizae Radix et Rhizoma), Xixin (Asari Radix et Rhizoma, 1 qian).
The above herbs are cut into small pieces and decocted in water.
Note: This formula involves herbs belonging to the Taiyang, Yangming, and Three Yin channels.
Master Yi stated: The Classic says that those with sweating should not take Mahuang (Ephedrae Herba), and those without sweating should not take Guizhi (Cinnamomi Ramulus). If mistakes are made, the resulting changes are incalculable. Therefore, this method was established to avoid violating the contraindications of the Three Yang channels, making it a divine formula for resolving exterior pathogens, not merely a medicine for miscellaneous diseases.

Respectfully noted: Zhang Zhongjing, in his discussion on releasing-the-exterior medicines for Shanghan, categorized them into the Six Channels, as well as methods for releasing the muscle layer and acupuncture. This was likely out of caution against misusing medicines leading to erroneous transformations. The above collected formulas are all variations of exterior-releasing treatments for Shanghan. One must carefully examine the pulse and symptoms before choosing to use them. However, although Yilao's Jiuwei Qianghuo Tang and Hejian's Tongjie San have different intentions, one must ensure that the medicine corresponds to the syndrome and that the name matches the reality before applying them. Otherwise, violating contraindications will lead to adverse reactions, losing the original intent of establishing the formula. Thus, Xu Wenzheng Gong (Xu Heng) said: In recent times, medical discussions include proponents of Hejian Liu Shi (Liu Wansu) and proponents of Yilao Zhang Shi (Zhang Yuansu). Zhang Shi's medication is based on the rising and falling of Yin and Yang across the four seasons, aligning with the meaning of "Regulating Spirit according to the Four Qi" in the Neijing. A physician who does not understand this and prescribes recklessly lacks skill. Liu Shi's medication focuses on eliminating the old and generating the new, preventing any stagnation, aligning with the meaning of continuous creation in nature. A physician who does not understand this also lacks skill. However, those advocating Zhang Shi may not fully grasp his subtleties, thus fearing to administer medications causing Mingxuan reactions (initial aggravation followed by improvement), leading to missed opportunities and untreatable delays. Those advocating Liu Shi may not fully comprehend his depth, achieving immediate effects but damaging righteous Qi and leaving future harm. If one can utilize the strengths of both schools while avoiding their drawbacks, treatment will likely succeed. From the formulation methods of these two formulas, it is evident that students of medicine should seek understanding in the classics, knowing their respective emphases, and should not be biased toward a single school.