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The *Huangdi Neijing* (Yellow Emperor's Inner Canon), chapter "Shengqi Tongtian Lun" (Discussion on the Communication of Vital Qi with Heaven), states: "When wind pathogens invade and disrupt vital qi, essence is exhausted, as evil damages the Liver." If one eats to fullness under such conditions, the sinews and vessels become lax, leading to hemorrhoids in the intestines.

Wind qi corresponds to the Liver, while "Yin qi" refers to chaotic qi resulting from the disorder of Yin and Yang. Due to this mutual chaos, when wind invades, it damages essence; damaged essence allows evil to enter the Liver.

Furthermore, if food and drink are consumed in excess, the stomach and intestines are injured. Yin and Yang lose harmony, causing obstruction and stagnation at the diaphragm and gates. Heat toxins pour downward, blood seeps into the large intestine, resulting in hemorrhoids and fistulas in the intestines. How can these be avoided? This presents a pattern of Qi deficiency with damp-heat pouring downward into the large intestine.

A patient suffered from *Fuguju* (Bone-abscess). The pus had matured but could not drain; it ulcerated and entered the abdominal cavity. The patient was mentally confused, unable to consume porridge or medicine, and all physicians were at a loss. I was invited to treat him. His pulse was fine as a spider's thread, and his breath was faint, nearly extinguished. I said, "There is no fatal danger. We can use a *Pizhen* (Bich needle) to puncture the abdomen to drain the pus." The pus drained profusely but was clear and thin, resembling crab spit. According to medical principles, penetration of the peritoneum is considered incurable. Some mocked me. I said, "There is no fatal danger; it is treatable." I prescribed a large dose of Ginseng, [missing herb], Aconite, combined with herbs that enter the Jueyin channel to promote circulation. Additionally, I prepared *Bawei Wan* (Eight-Ingredient Pill). After taking the pills, his appetite greatly improved, consuming over a *sheng* (approx. 1 liter) of rice daily. He recovered in about thirty days. My reasoning for deeming it treatable was that in ulcerative diseases, a surging and solid pulse indicates death, whereas a fine and weak pulse indicates life. Here, the pulse was fine and weak, consistent with the physical condition, indicating the body could accept tonification. Hence, I stated it was treatable. I punctured the abdomen because undrained pus would inevitably attack the interior organs; palpation confirmed the depth, ensuring the puncture caused no suffering. I believed the peritoneum was either intact or penetrated without damage because there were no malignant signs. I administered *Bawei Wan* because it tonifies the Kidney; strong Kidney Qi rises, opening the stomach gate and increasing food intake. Since the pus had already drained significantly, small doses of decoction alone would be insufficient. Delaying treatment risks further complications. Therefore, I used appetite-opening medicines to encourage the consumption of rich foods for nourishment, allowing muscles to regenerate quickly. This is a key method for treating ulcers.

Ancient surgeons (*Yangyi*) would carefully examine the meridians, clarify deficiency and excess, distinguish organ pulse patterns, and understand the sources of Ying and Wei Qi and Blood and Qi. They were unlike contemporary surgeons who merely know how to apply external plasters without understanding meridians and organs; such practitioners are mediocre artisans.