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The Qi of Heaven is pure and unceasing in its movement; when influenced by the steaming of damp-heat from mountains and marshes, it transforms into clouds, mist, rain, and thunder. In the human body, Yuan Qi (Original Qi) guides the blood. If the ascending and descending mechanisms are disordered, stagnation may occur in the hypochondriac region, forming *pi* masses (accumulations), leading to stabbing pain in the heart, abdomen, and flanks. If it accumulates in the Lower Jiao (Lower Burner), it causes lower back pain, abdominal distension, and a sensation of bearing down. If it flows through the meridians and collaterals, it results in wandering stabbing pains throughout the body. These conditions often arise from emotional disturbances or dietary irregularities, causing Qi stagnation that transforms into damp-heat, subsequently generating phlegm and accumulations.

In the early stage of the disease, acrid-warm herbs should be used to open stagnation, promote Qi movement, resolve phlegm, and dissipate accumulations. After some time, acrid-neutral herbs should be used to harmonize, or acrid-cold herbs to subdue heat. In this manner, fire will easily descend, Qi will easily level out, and the root of the disease can be eradicated.

**Kaiyu Liqi Tang (Open Stagnation and Regulate Qi Decoction)**: Treats Qi stagnation that fails to disperse, resulting in abdominal distension and fullness.
Ingredients: Xiangfu (Cyperus Rhizome), Chenxiang (Aquilaria Lignum), Banxia (Pinellia Rhizoma) (each 1 qian); Suzi (Perilla Fructus), Zhishi (Aurantii Fructus Immaturus), Luobozhi (Brassicae Semens) (each 1.5 qian); Dingxiang (Caryophylli Flos), Dafupi (Arecae Pericarpium), Huoxiang (Pogostemonis Herba) (each 0.8 qian). Decoct with water and take hot.

**Qingqi Yigan Wan (Clear Qi and Suppress Liver Pill)**: Treats Qi that fails to dissipate and stagnates above the diaphragm.
Ingredients: Qingpi (Citri Reticulatae Pericarpium Viride), Sangbaipi (Mori Cortex), Zhike (Aurantii Fructus) (each 3 qian); Tanxiang (Santalum Album Lignum), Shanzhiren (Gardeniae Semen), Wuyao (Linderae Radix) (each 1 qian); Banxiaqu (Pinellia Fermentatum), Juhong (Citri Reticulatae Pericarpium), Baidoukou (Amomi Fructus Rotundus) (each 1.5 qian); Sharen (Amomi Fructus) (1.2 qian). Add three slices of fresh ginger, decoct, and take.

For Qi stagnation in the Upper Jiao (Upper Burner), the main formula consists of Juhong, Zhike, Jiegeng, Gancao, Huoxiang, Xiangfu, Huanglian, Sharen, Pipaye, and Gualouren.
For Qi stagnation in the Middle Jiao (Middle Burner), the main formula consists of Muxiang, Binglang, Shanzha, Zhike, and Pengru; if located in the hypochondriac regions, add Qingpi, Chaihu, Longdancao, and Shaoyao.
For Qi stagnation in the Lower Jiao (Lower Burner), the main formula consists of Chenxiang, Huixiang, Chuanlianzi, Lizhike, and Shanzhi.

"DYu" (Stagnation) refers to the binding and clustering of Qi that cannot be dispersed. When what should ascend does not ascend, what should descend does not descend, and what should transform does not transform, various diseases arise. However, there are cases where long-standing unresolved diseases lead to Yu, and cases where long-standing Yu leads to disease. There are six types of symptoms, with pulses mostly appearing deep and hidden:
Chest fullness and hypochondriac pain, with a deep and choppy pulse, indicates **Qi Yu** (Qi Stagnation).
Wandering pain in joints throughout the body, a sensation of heaviness or covering on the head, heavy legs that worsen in cold and damp weather, with a deep and sluggish pulse, indicates **Shi Yu** (Dampness Stagnation).
Fullness in the chest and diaphragm, panting upon exertion, lethargy in rising and lying down, with a deep and slippery pulse at the Cun position, indicates **Tan Yu** (Phlegm Stagnation).
Blurred vision, dry mouth, dry tongue, red and scanty urine, with a deep and rapid pulse, indicates **Re Yu** (Heat Stagnation).
Weakness in the four limbs, ability to eat but bloody stools, with a deep, large, and empty (Kou) yet choppy pulse, indicates **Xue Yu** (Blood Stagnation).
Belching with sour regurgitation, abdominal fullness, inability to eat, with a normal pulse on the left hand and a tight, vigorous pulse on the right hand, indicates... [Text ends here].