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The Stomach is the fu-organ responsible for receiving and storing, while the Spleen is the official responsible for transportation and transformation. Therefore, when food and drink enter the Stomach, they rely on the Spleen Qi's (Spleen Qi) transformative and transporting function to subsequently nourish the four limbs and sustain the muscles. The Stomach belongs to Yang, and the Spleen belongs to Yin; the Spleen and Stomach are connected by membranes, allowing Yin and Yang to interact. If a person can eat but remains emaciated, it indicates an isolation between Yang and Yin. The Yangming channel does not follow its biao-biao relationship but transforms according to the zhongjian qi (middle-view qi) of the Taiyin channel. Yangming is a fu-organ of dryness and heat; if it does not receive the dampening transformation of Taiyin, the fierce heat qi will become even more vigorous. If the Spleen cannot receive the essence from food and drink, the qi of Taiyin will become increasingly deficient. Thus, heat in the Stomach leads to rapid digestion and easy hunger, while deficiency of Spleen Qi leads to daily emaciation of the muscles. The excessive becomes more excessive, and the deficient becomes more deficient, gradually progressing to a state of "five excesses" and "two deficiencies," which results in death that is untreatable. Substances such as Renshen (Ginseng Radix), Gancao (Licorice Root), Banxia (Pinellia Tuber), Jupi (Tangerine Peel), and Shengjiang (Fresh Ginger) are substances that assist Stomach Qi. Baizhu (Atractylodis Macrocephalae Rhizoma), Cangzhu (Atractylodis Rhizoma), Shanyao (Dioscoreae Rhizoma), Huangqin (Scutellariae Radix), Houpo (Magnoliae Officinalis Cortex), Fuling (Poria), Ganjiang (Zingiberis Rhizoma), and Dazao (Jujubae Fructus) are substances that assist Spleen Qi. Zhishi (Aurantii Fructus Immaturus), Huanglian (Coptidis Rhizoma), Dahuang (Rhei Radix et Rhizoma), Shigao (Gypsum Fibrosum), Huren (Cannabis Semen), and Shaoyao (Paeoniae Radix) are medicines that suppress Stomach Qi. The Classics state: "Suppress what is excessive, support what is deficient." If one does not understand the primary functions of medicinal properties and fails to distinguish between strength and weakness when applying suppression or support, the result is that the excessive remains excessive, and the deficient remains deficient. The Yangming Chapter states: "Stomach Qi generates heat, and its Yang becomes isolated." It also says: "Floating pulse indicates strong Stomach Qi, and the Spleen is constrained; Maren Wan (Hemp Seed Pill) is the main treatment." This represents the isolation of Yang and Yin, treated by suppressing the excessive aspect.

Zhang Kaizhi said: "This is a new disease caused by external pathogens, so only the method of suppressing the excessive should be used. If the disease has persisted for a long time leading to muscle emaciation, one should use spleen-assisting medicines as the sovereign drug, stomach-assisting medicines as the minister drug, to allow Stomach Qi and Spleen Qi to communicate, and stomach-draining medicines as the assistant drug. This is the correct treatment method."

It is well known that diseases arise from internal injury or external contraction, but few know about "Qiheng" (strange and constant/unusual) diseases! What is meant by "Qiheng" is that which differs from the ordinary. It involves Yin-Yang bias and excess, reverse transmission of the Five Elements, where examining syndromes and differentiating pulses differs greatly from the norm. In the *Neijing* (Inner Canon), there are fewer than twenty chapters discussing diseases, yet eight chapters specifically discuss Qiheng diseases. Students of medicine must study these with care to avoid the responsibility of the "Five Errors."