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[Danxi] Discourse on Dao Cang (Inverting the Granary): The Classics state: "The intestines and stomach are like a market." Because they contain everything, and grains are the most abundant, it is called "Cang" (Granary), like a room storing grain. "Dao" (Invert) means to pour out old accumulations and wash them clean. The Stomach resides in the Middle Jiao, belongs to Earth, likes to receive and accept but cannot transport itself. When people eat, encountering food that suits their taste, is it not possible to overeat and cause injury and accumulation? With the bias of the Seven Emotions and the richness of the Five Flavors, is it not possible to injure the virtue of harmony? Residues of chaff and waste, stagnant phlegm and blood stasis, entangle with each other, accumulating day by day and month by month, becoming depressed and forming masses, even resembling the pulp of peach pits or various bizarrely shaped parasites, causing the Central Palace (Spleen and Stomach) to be unclear and the Virtue of Earth to be disharmonious. Disease within necessarily manifests without, erupting as paralysis, consumptive disease (Lao Zhai), abdominal distension and swelling, leprosy, and nameless strange diseases. Ancient sages formulated agents such as Wan Bing Wan (Ten Thousand Diseases Pill) and Wen Bai Wan (Warm White Pill), combining attack and tonification, using cold and heat together, aiming to fit the condition of the disease; while ingenious, they are not as convenient as Dao Cang. Select a yellow ox, buy one or two jin (approx. 5-10 kg) of fat ones, boil them rotten in flowing water, blend into the soup to form liquid, filter out the dregs with silk cloth, take the pure juice, put it back in the pot, and simmer with mild and strong fire until it becomes amber-colored. Drink one cup at a time, drink again after a short while, accumulating dozens of cups. In cold months, warm it in a double boiler before drinking. For diseases in the upper part, desire more vomiting; for diseases in the lower part, desire more diarrhea; for diseases in the middle, desire both vomiting and diarrhea. It all depends on flexible adjustment of speed and quantity. First, prepare a bright but non-ventilated room to settle the patient. Observe the expelled matter; if the root of the disease is exhausted, stop. After vomiting and purging, if thirsty, do not drink hot water. Urine will necessarily become long in volume; collect it to give to the patient, named "Hui Lun Jiu" (Wheel-turning Wine), give one or two bowls; this not only quenches thirst but also washes away residual filth. Sleep for one or two days, feel the muscles becoming light and healthy, then give bland porridge. Wait three days before giving vegetable soup. Self-nourish for half a month, feel spirit radiating and body light and robust, chronic ailments completely healed. Afterwards, avoid beef for five years. My teacher, Lord Xu Wenyi, initially suffered from heart pain, using hot, dry, aromatic, and pungent herbs such as Ding (Clove), Fu (Aconite), Gui (Cinnamon Twig), and Jiang (Dried Ginger), treating for several years but resulting in leg cramps and pain, even aversion to cold and frequent vomiting. Severe cases used Ling Sha (Cinnabar), Mo Xi (Lead), Huang Ya Hui Dan, followed by moxibustion totaling over 100,000 applications, plus miscellaneous treatments for several years, yet pain increased. He considered himself disabled, and all doctors were at their wit's end. Such continued for several more years, extreme exhaustion, irritability, thirst, and anorexia for a month. Having taken Tong Sheng San (Unimpeded Holy Powder) for over half a month, he experienced urgency and heaviness in the large intestine, burning heat in the anus. Initially, stool contained stagnation resembling colorful rotting brocade or candle grease. Near half a month later, symptoms seemed to recede; another half month later, slight appetite returned, but legs were difficult to move, with no solution. In March of the next year, this method was performed, responding step-by-step, thus recovering health. The following year, a son was born; he lived another fourteen years until death. Another woman suffered from Hong Kong Foot (podagra/tinea pedis) for many years, cured through vomiting and purging. Lin Xiong from Linhai suffered from chronic cough with hemoptysis, fever, and emaciation. Others treated him as Lao Zhai (consumption), but hundred prescriptions failed. I was summoned to examine him; pulse was wiry and rapid in both hands, lighter by day and heavier by night. With no other plan, he was also cured by this method. It was the tenth lunar month; he had a son in the third year. Xiao Boshan, a Guard Commander, suffered from turbid urine and seminal emission, tried it personally with effective results. Ox is Kun Earth, color of yellow earth, its virtue is obedience, and its function imitates strength; this is the use of the male ox. Meat is what the Stomach delights in. Cooked into liquid, it is formless. It spreads horizontally into flesh, passes through intestines and stomach, and penetrates skin, pores, hair, nails—nothing is unattainable. Accumulations, lasting long, form substance, attaching to intestines and stomach, residing in folds and curves, acting as nests, obstructing fluids, where Qi and Blood steam and scorch, causing disease. Without the divine skill of "inverting intestines and scraping bones," who can remove it? How could pills and powders measured in small units penetrate its walls and windows? Carefully observing the dispersion of meat liquid, the intestines and stomach receive it; its concentration doubles as before, resembling swelling. In those folded areas, no longer the old fluid circulating fully, it resembles a flood rising, pushing floating decay downstream, unable to stay. Surface layers sweat via vomiting; clear pathways surge via vomiting; turbid pathways exit via diarrhea. All obstructions are washed empty. Beef possesses heavy, rich, harmonious, and smooth nature, radiant and dispersing, moistening witheredness, tonifying deficiency. Is there not joy in spirit radiating? It is like King Wu of Zhou after conquering Shang, distributing wealth and grain to relieve the hopes of Yin people. This prescription comes from a supreme person in the Western Regions. It can be performed once or twice after middle age, assisting in dispelling disease and nurturing longevity. [Letter to Dai Suzhai]: Dao Cang is not something I am reluctant to share, but few are dedicated learners. However, patients often cling to temporary comfort and delay subsequent efforts. Relying entirely on self-drinking ten-plus cups of Hui Lun Jiu to expel residual filth, welcome harmony, renew Ying and Wei (Nutritive and Defensive Qi), making Zang-Fu and San Jiao vitality flourish, achieving rebirth. Many dislike its foulness and refuse to eat it. Unless one understands physics and transformation, who would regard it as fine wine and good medicine? At our last meeting, I missed discussing this point. Some stopped midway due to this. Would it not be failing at the last basket of earth, traveling in vain, and wasting heaven's gift? I dare to explain in detail. Furthermore, after drinking seven or eight cups, the medicinal power searches through meridians and joints to expel old filth. Will righteous Qi and pathogenic factors not conflict? There must be urgency and oppression, pain-like but not pain, a period of distress. These are good news: evil cannot overcome righteousness, about to be captured. One must endure. When wanting to vomit but not yet, wanting to purge but not yet, or when vomiting and purging occur together, there is naturally annoyance. One must accept it happily and let the doctor wait quietly. Moreover, this state lasts half a day. Explain it beforehand so the mind is clear, allowing calm endurance. Dao Cang treats carbuncles, consumption, gu poisoning, leprosy, etc., eliminating the old and generating the new, supporting deficiency and tonifying loss, capable of inducing vomiting or purging. Use twenty jin of lean meat from the hind leg of a yellow fat bull. Boil in fast-flowing water in a large pot. Add water as needed, never cold water. Boil until meat disintegrates into dregs. Filter out dregs. Re-boil the broth until amber-colored. Skip dinner the night before. If constipated, take Shen Gong Wan the night before; if not constipated, do not use. At dawn (Wu Geng), drink one cup warm in a dark, non-ventilated room. Wait for medicine to move in the diaphragm, then drink again, continuously up to seven or eight cups. If the patient refuses, force them to drink. Pain throughout the body and skin must appear before vomiting/purging occurs. For upper diseases desiring more vomiting, administer closely but not too tightly, lest it be rejected. For lower diseases desiring more purging, administer sparsely but not too loosely, lest it go too far. Adjust according to circumstances. Generally, start with the lower portion to induce vomiting. Extreme vomiting and purging are required to ensure all upper and lower accumulations exit in stool. Stop when stool resembles walnut meat with no foul odor. After sleeping and breathing stabilizes, drink one or two cups of Huan Hun Jiu (Return Soul Wine, i.e., patient's urine). Nourish with porridge. No cure will fail. One month before this method, avoid women. Half a year after, avoid women. Do not eat beef for three years. Those with impatient temperaments and lustful desires who do not observe taboos must not perform this method. Dao Cang relies entirely on slow drinking of the first three cups, which is most critical, allowing entry into the meridians.