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Ginseng Radix (Renshen), Atractylodis Macrocephalae Rhizoma (Baizhu), Glycyrrhizae Radix et Rhizoma Praeparata cum Melle (Gancao Zhi), and Zingiberis Rhizoma (Ganjiang) are each used in the amount of three liang.
These four ingredients are crushed, sifted, and mixed with honey to form pills, sized like a chicken egg yolk. One pill is crushed and taken with warm decoction made from boiling water (approximately 200 ml). The dosage is three to four times daily, and twice at night. If warmth is not felt in the abdomen, increase the dose to three or four pills per administration; however, the efficacy is inferior to that of the decoction. For the decoction method, cut the four ingredients according to the specified weights, add eight sheng of water, and boil until three sheng remain. Strain the dregs, and take one sheng of the liquid warm, three times daily.

Modifications:
If there is throbbing above the umbilicus, indicating movement of Kidney Qi, remove Baizhu and add Rougui (Cinnamon Twig) four liang.
If vomiting is frequent, remove Baizhu and add Shengjiang (Fresh Ginger) three liang.
If diarrhea is frequent, continue using Baizhu; if palpitations occur, add Fuling (Poria) two liang.
If there is thirst and desire for water, increase the amount of Baizhu so that the total reaches four and a half liang.
If there is abdominal pain, increase the amount of Renshen so that the total reaches four and a half liang.
If there is cold sensation, increase the amount of Ganjiang so that the total reaches four and a half liang.
If there is abdominal fullness, remove Baizhu and add one Fuzi (Prepared Aconite Root).
After taking the decoction, approximately after the time it takes to eat a meal, drink about one sheng of hot porridge to induce slight warmth; do not uncover clothes or blankets to cool down.

[Collected Commentary]
Cheng Yingmao stated: The movement of Yang Qi begins with warmth. When warm Qi flows freely, the essence of grains is transported; when grain Qi ascends, the Middle Jiao Qi is sufficient. Hence, it is named "Li Zhong" (Regulating the Middle), actually employing the function of regulation to provide Yang Qi to the Middle Jiao. This implies that Yang deficiency leads to the loss of Middle Qi control, causing the Danzhong (Sea of Qi) to lose its dispersing and descending functions, and the Six Fu Organs to lose their sprinkling and arranging functions. It is like an axe chopping wood without fire; thus, lower clear undigested stool appears, upper taste perception is lost, and the Five Zang Organs invade and plunder each other, giving rise to various symptoms. Renshen, Baizhu, and Zhi Gancao serve to guard the Central State; Ganjiang is pungent and warm to heat the Middle. It is necessary to borrow its power to ignite the wood and raise Yang Qi. Thus, grain enters the Yin, grows in the Yang, transports upward to the Huagai (Lungs), and controls downward the Zhoudou (Bladder), so that all Zang and Fu organs receive Qi. This is the purport of Li Zhong. If Water and Cold compete mutually, both Spleen and Kidney should be warmed simultaneously by adding Fuzi, thereby benefiting the Mingmen (Gate of Life) and warming the Mother of Earth (Spleen). Baizhu tonifies the Spleen, but combined with Renshen may cause Qi stagnation; therefore, in cases of Qi movement below the umbilicus, frequent vomiting, or abdominal fullness, Baizhu is removed. Adding Rougui attacks Kidney pathogenic factors; adding Shengjiang stops vomiting; adding Fuzi eliminates Yin Cold. Frequent diarrhea indicates excessive Dampness, hence Baizhu is still used to dry Dampness. Desire to drink water indicates retained fluid; adding Baizhu helps transform fluid and generate Jin-Ye (Body Fluids). Palpitations in the epigastrium indicate retained water; adding Fuling guides out water. Abdominal pain requires doubling Renshen due to deficiency pain. Cold sensations require adding Ganjiang due to severe cold.

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In Shaoyang disease (Taiyang disease in Shanghan Lun context), originally presenting with cold-type diarrhea, if the physician erroneously applies emetic and purgative methods, Cold obstruction occurs, exacerbating vomiting and diarrhea. If food is vomited immediately upon entering the mouth, Ganjiang Huanglian Huangqin Renshen Tang (Dry Ginger, Coptis, Scutellaria, and Ginseng Decoction) is indicated.

[Annotation]
The Classics do not mention a disease called "Han Xia" (Cold Downward), nor does the text contain this phrase. Examining the subsequent text "Han Ge Geng Ni Tu Xia" (Cold obstruction further reverses vomiting and diarrhea), it can be deduced that the character "Xia" (Downward) in "Han Xia" should be "Ge" (Obstruction/Rejection), making the textual meaning coherent. Commentators have interpreted this as Stomach Cold with diarrhea, which not only contradicts the textual logic but also conflicts with the properties of Huangqin (Scutellariae Radix) and Huanglian (Coptidis Rhizoma).

[Note]
The Classic states: "Ge results in vomiting and reversal." "Ge" is the name of the disease characterized by vomiting and reversal. Vomiting in the evening what was eaten in the morning indicates Spleen Cold Ge; vomiting immediately after eating indicates Stomach Heat Ge. "Originally having Han Ge" means the patient inherently suffers from the disease of morning-eating-evening-vomiting caused by Cold Ge. Now, contracting Taiyang disease, the physician sees signs suitable for emesis or purgation and rigidly adheres to established protocols, applying emetic and purgative treatments again. This causes the Cold Ge to become more reversed and chaotic under the influence of these treatments. One should use Lizhong Tang (Regulate the Middle Decoction) to warm the Taiyin, possibly adding Dingxiang (Caryophylli Flos) to descend Cold reversal. However, if food is vomited immediately upon entry, this is not Cold Ge but Heat Ge. In this case, Ganjiang and Renshen should be used to calm the Stomach, while Huanglian and Huangqin should be used to descend Stomach Fire.