经云∶胃者，五脏六腑之大源也。人自有生之后，惟赖五谷以滋养。谷入于胃，流行于
脏腑，化津化液，熏肤、充身、泽毛，莫不以胃气为本。人有胃气则生，无胃气则死。故仲景
《伤寒论》阳明症最多。阳明者，胃也。变化五谷滋生之大源，七情六淫皆以胃气强弱为转
移，推而至于温热、暑湿、疟痢、咳嗽、呕泻、肿胀、胸闷、气痛等症，均出于胃也。夫胃为水谷
之海，生化之源，内而脏腑、气血，外而筋骨、皮肉，无不赖以灌溉，万物所归者也。经以胃
为多气多血，一身之关键。人身七情之感，怒盛伤肝，肝动则气逆上冲，怒息则肝自平，而
所病者，乃被冲之胃耳。假使邪入五脏，其人立死，虽轻邪亦为痼疾矣。
市医不知生化之理，谬称风伏于肺，又云脾为生痰之本、肺为贮痰之器，或谓痰迷心
窍，殊觉喷饭，不思之甚。盖肺为娇脏，何能留风、贮痰？试问其风、其痰，从何道入内耶？至
于心为一身之主，其窍更何能容痰？况心、肺居至高之位，不能入痰，即脾亦为清净之脏，
亦不能容痰。每见痰由食管吐出，即知痰生于胃矣。余临症研究，历验心得而阐明之，以启
后进而免再误也。大抵人身以胃为总司，其用烦杂，其位冲要，凡内外诸病无不归之于胃。
余每用治胃方法以疗诸病，功效捷应。今特揭明，以备采择，不致为古书所惑。孟子云∶“尽
信书不如无书”一语，推而至于《内》、《难》经文，其中谬误，不可枚举。余为活人计，不得不
直言之欤。
澜按∶万物莫不归于胃，故胃为五脏六腑之海也。今先生阐发胃之功用，博考治胃诸
方，以疗温热、湿温危 ；又扩充肝、肺诸病，亦因于胃病者，于是专以治胃，功效昭着。藉
以启后进之智识，不致仍惑于阴阳五行、八味六味汤丸可治一切病患之遗害，挽回温补之
颓风，先生之济世苦心，昭然若揭矣。
The *Classic of Acupuncture and Moxibustion* (Jing Yun) states: The Stomach is the great source of the five zang organs and six fu organs. Since birth, humans rely solely on the five grains for nourishment. When grains enter the Stomach, they circulate through the zang-fu organs, transforming into body fluids (Jin-Ye), steaming the skin, filling the body, and moistening the hair; none of these functions occur without the Stomach Qi as the foundation. A person lives with Stomach Qi and dies without it. Therefore, in Zhang Zhongjing’s *Treatise on Cold Damage Disorders* (Shanghan Lun), Yangming diseases are the most numerous. Yangming refers to the Stomach. It is the great source that transforms grains and generates nutrients. The influence of the seven emotions (Qi Qing) and the six pathogenic factors (Liu Yin) shifts according to the strength or weakness of Stomach Qi. Extending this logic, conditions such as warm-heat disorders, summer-dampness disorders, malaria, dysentery, cough, vomiting and diarrhea, swelling, chest fullness, and qi pain all originate from the Stomach. The Stomach is the sea of water and grain, the source of bio-transformation. Internally, it irrigates the zang-fu organs and qi-blood; externally, it nourishes sinews, bones, skin, and flesh. All things ultimately return to it. The classics describe the Stomach as having abundant qi and blood, serving as the key to the entire body.
When the human body is affected by the seven emotions, excessive anger damages the Liver. When Liver qi becomes active, it rebels and rushes upward; once the anger subsides, the Liver naturally calms down, but the disease manifested is actually in the Stomach that was struck. If pathogenic factors invade the five zang organs, death occurs immediately; even mild pathogens can become chronic, stubborn diseases.
Modern physicians do not understand the principles of bio-transformation. They absurdly claim that wind lingers in the Lung, or that the Spleen is the root of phlegm production while the Lung is the vessel storing phlegm, or that phlegm confuses the Heart orifices. This is laughable and shows a profound lack of thought. The Lung is a delicate organ; how can it retain wind or store phlegm? One must ask: through what pathway do wind and phlegm enter the interior? As for the Heart, which is the master of the body, how can its orifices accommodate phlegm? Moreover, the Heart and Lung reside at the highest position and cannot accept phlegm; even the Spleen, being a pure and clear organ, cannot tolerate phlegm. Frequently observing that phlegm is expectorated through the esophagus, one knows that phlegm is generated in the Stomach. Through clinical research and repeated verification, I have elucidated this point to enlighten future generations and prevent further errors. Generally speaking, the Stomach serves as the general manager of the body. Its functions are complex, and its position is crucial. All internal and external diseases ultimately归结 (converge) to the Stomach. Whenever I use methods to treat the Stomach to cure various diseases, the efficacy is rapid. I hereby reveal this clearly for reference, so as not to be confused by ancient texts. Mencius said, "To believe everything in books is better than having no books at all." Applying this to the scriptures of the *Inner Canon* (Nei Jing) and the *Classic of Difficult Issues* (Nan Jing), their errors are too numerous to enumerate. For the sake of saving lives, I feel compelled to speak plainly.
Commentary by Lan: All things return to the Stomach; thus, the Stomach is the sea of the five zang and six fu organs. In this text, the author elucidates the functions of the Stomach, extensively examines formulas for treating the Stomach, and applies them to critical conditions such as warm-heat and damp-warmth disorders. He also expands upon liver and lung diseases, noting that many arise from stomach pathology. By focusing specifically on treating the Stomach, he achieves remarkable efficacy. This aims to enlighten the knowledge of junior practitioners, preventing them from remaining misled by theories of yin-yang and five elements, or the fallacy that Ba Wei Wan and Liu Wei Wan can cure all ailments. He seeks to reverse the decadent trend of indiscriminate warming and tonification. The author’s sincere intention to benefit the world is clearly evident.