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According to the *Huangdi Neijing* (Yellow Emperor's Inner Canon): The symptoms of Changbi (Intestinal Bi Syndrome) include frequent drinking with inability to urinate, abdominal qi counterflow and clashing, and occasional occurrence of undigested stool diarrhea (Sunxie). The Large Intestine is the official responsible for conduction. Its ability to conduct relies entirely on the harmonious qi (Chonghe zhi qi). Currently, when the three pathogenic factors of Wind-Cold-Dampness invade and lodge in the intestines due to deficiency, evil qi remains stagnant while the harmonious qi becomes blocked. Therefore, its manifestations include frequent drinking but obstructed qi flow, accompanied by abdominal distension and pain.

Muxiang Wan (Cinnamon Twig and Costus Root Pill), sourced from *Shengji Zonglu* (Compendium of Holy Relief), treats intestinal distension, fullness, and pain caused by Changbi, recurrent undigested stool diarrhea, indigestion, and scanty, difficult urination.
Ingredients: Muxiang (Costi Radix), Baizhu (Atractylodis Macrocephalae Rhizoma), Guizhi (Cinnamomi Ramulus, bark removed), Wuyi (Myristicae Semen), Gaoliangjiang (Alpiniae Officinarum Rhizoma, chopped, each 1 liang), Helile (Terminalia Chebulae Fructus, roasted, peel only 1.5 liang), Ganjiang (Zingiberis Rhizoma Praeparatum, 3 pieces, processed with ginger skin and ginger juice). Usage: Grind the above herbs into fine powder, mix with honey to form pills the size of tung tree seeds. Take 20 pills per dose, with rice decoction, on an empty stomach and before meals.

Wuzhuyu San (Evodia Powder) treats Changbi where cold-dampness internally struggles, causing abdominal and intestinal fullness, urgent breathing, and undigested stool diarrhea.
Ingredients: Wuzhuyu (Evodiae Fructus, washed with water, dried, fried), Roudoukou (Myristicae Semen), Ganjiang (Zingiberis Rhizoma Praeparatum), Gancao (Glycyrrhizae Radix et Rhizoma, honey-fried, each half liang), Chenjupi (Citri Reticulatae Pericarpium, white pith removed with water, dried), Gaoliangjiang (Alpiniae Officinarum Rhizoma, each half liang). Usage: Grind the above herbs into powder. Take 1 qian per dose, mixed with thin porridge drink.

Caodoukou San (Cardamom Powder), sourced from *Shengji Fang*, treats Changbi where cold-dampness attacks internally, causing abdominal pain and undigested stool diarrhea.
Ingredients: Caodoukou (Alpiniae Katsumadai Semen), Chenjupi (Citri Reticulatae Pericarpium, soaked in water, white pith removed, each 1 liang), Guizhi (Cinnamomi Ramulus, bark removed), Muxiang (Costi Radix), Baizhu (Atractylodis Macrocephalae Rhizoma), Danggui (Angelicae Sinensis Radix, sliced and dried), Baidoukou (Amomi Fructus Rotundus), Gaoliangjiang (Alpiniae Officinarum Rhizoma, each 1 liang). Usage: Grind the above herbs into powder. Take 2 qian per dose, boil in 1 cup of water until reduced to 0.6 cup, strain, and take warm before meals.

Helile Tang (Terminalia Decoction), sourced from *Shengji Lu*, treats undigested stool diarrhea, abdominal distension and qi pain, and food indigestion caused by Changbi.
Ingredients: Helile (Terminalia Chebulae Fructus, roasted, peel only 1.5 liang), Fuzi (Aconiti Lateralis Radix Praeparata, peeled and de-navelled, 1 liang), Muxiang (Costi Radix, half liang), Danggui (Angelicae Sinensis Radix, sliced and dried, 3 fen), Jiegeng (Platycodonis Radix, fried, half liang), Renshen (Ginseng Radix, 3 fen), Gancao (Glycyrrhizae Radix et Rhizoma, honey-fried, 1 fen). Usage: Coarsely chop the above herbs. Take 3 qian per dose, add 1.5 cups of water, boil until reduced to 0.8 cup, strain, and take warm before meals.

Muxiang San (Costus Powder), sourced from *Shengji Lu*, treats Changbi with abdominal distension, undigested stool diarrhea, and difficult urination.
Ingredients: Xingren (Armeniacae Semen Amarum, 3 liang), Helile (Terminalia Chebulae Fructus, roasted, peeled, half liang), Fuzi (Aconiti Lateralis Radix Praeparata, peeled and de-navelled, 1 liang), Ganjiang (Zingiberis Rhizoma Praeparatum, 1 liang), Nongpo (Magnoliae Officinalis Cortex, bark removed, processed with ginger juice), Danggui (Angelicae Sinensis Radix, fried, 1 liang). Usage: Grind the above herbs into powder. Take 2 qian per dose, boil in 1 cup of water until reduced to 0.6 cup, strain, and take warm before meals.

Chifuling Wan (Red Poria Pill), sourced from *Shengji Lu*, treats Changbi with abdominal fullness, wheezing and urgency, difficult urination, and undigested stool diarrhea.
Ingredients: Chifuling (Poria cum Risu Rubrum, black skin removed), Baizhu (Atractylodis Macrocephalae Rhizoma), Guizhi (Cinnamomi Ramulus, bark removed, each 2 liang), Helile (Terminalia Chebulae Fructus, roasted, core removed), Muxiang (Costi Radix), Chenjupi (Citri Reticulatae Pericarpium, white pith removed with water, dried), Nongpo (Magnoliae Officinalis Cortex, bark removed, processed with ginger juice, each 1 liang). Usage: Grind the above herbs into fine powder, mix with honey to form pills the size of tung tree seeds. Take 30 pills per dose, on an empty stomach and before meals, with rice decoction, three times daily.

Helile Wan (Terminalia Pill), sourced from *Shengji Lu*, treats undigested stool diarrhea and abdominal and hypochondriac distension caused by Changbi.
Ingredients: Helile (Terminalia Chebulae Fructus, roasted, peel used), Danggui (Angelicae Sinensis Radix, lightly fried), Huanglian (Coptidis Rhizoma,须 removed), Baizhu (Atractylodis Macrocephalae Rhizoma), Nongpo (Magnoliae Officinalis Cortex, bark removed, processed with ginger juice, each 1 liang), Ganjiang (Zingiberis Rhizoma Praeparatum, 3 fen). Usage: Grind the above herbs into fine powder, mix with honey to form pills the size of tung tree seeds. Take 20 pills per dose, on an empty stomach and before meals, with thin porridge drink.