The *Huoren Shu* (Book of Vitality) discusses the treatment of Shanghan (Cold Damage) for both children and adults; the methods are generally the same, but with slightly smaller dosages and cooler medicinal properties. Question: What is the cause of fever recurring after the recovery from Shanghan? This is named "Laofu" (Recurrence due to Labor) or "Shifu" (Recurrence due to Diet). When a disease has just healed, Qi and Blood are still deficient, and Body Fluids have not yet recovered. Due to physical exertion generating internal heat, this heat returns and re-enters the meridians, which is called "Laofu". Zhang Zhongjing stated: If fever recurs after the recovery from Shanghan, Xiao Chaihu Tang (Minor Bupleurum Decoction) should be administered as the primary treatment. If the pulse is floating, resolve it by inducing sweating (Chaihu Guizhi Tang [Bupleurum and Cinnamon Twig Decoction] is suitable); if the pulse is excess/solid, resolve it by purging (Daxiehu Tang [Major Bupleurum Decoction] is suitable). Furthermore, for recurrence due to labor after a major illness, Zhishi Zhizi Tang (Immature Bitter Orange and Gardenia Decoction) should be administered.

The *Qianjin Fang* (Essential Prescriptions Worth a Thousand Gold) records: To treat Laofu and revive the seemingly dead, use Maimendong Tang (Ophiopogon Decoction). There is also "Shifu" (Recurrence due to Diet). After a major illness has just healed, the Spleen and Stomach remain weak, and Grain Qi has not recovered. Forcing excessive food intake causes stagnation and accumulation that cannot be digested, leading to fever, which is called "Shifu". (Generally, after a new illness heals, recurrence is often due to dietary injury, presenting with symptoms such as epigastric fullness/stuffiness, dry belching with a smell of rotting food, borborygmus in the abdomen, and diarrhea; in such cases, Shengjiang Xiexin Tang [Ginger Decoction for Draining the Epigastrium] can be given.) Zhang Zhongjing, regarding the syndrome of Zhishi Zhizi Tang, stated: If there is retained food, add Dahuang (Rhubarb Rhizome) pieces the size of five or six chess pieces, and administer; the patient will recover. (The Yellow Emperor asked: Why is there sometimes residual heat after the resolution of a Heat Disease? Qibo answered: In all cases of residual heat, it is because the patient ate strongly while the pathogenic heat was severe, thus leaving residual heat. In such instances, the disease has declined but the heat is hidden within. Because the Qi of the food struggles with the residual heat, the two heats combine, resulting in residual heat. The Emperor said: Excellent. How should residual heat be treated? Qibo said: Observe their deficiency or excess, regulate their reversal or normalcy, and the disease can certainly be cured. Eating meat causes recurrence; eating too much causes residual heat; these are the prohibitions.)

The *Guangji Fang* (Extensive Rescue Formulas) treats Laofu; Xiongshushi San (Male Rat Dropping Powder) and Xu Renze Qiwei Congbai Tang (Xu Renze's Seven-Ingredient Scallion White Decoction) are both selectable options.

The *Qianjin Yaofang* (Essential Prescriptions Worth a Thousand Gold) treats pediatric Shanghan where the disease persists for a long time without resolving, and upon recovery, the condition worsens, leading to emaciation and visible bones. Use Wuweizi Tang (Schisandra Decoction):
Wuweizi (Schisandrae Fructus, 10 zhu), Gancao (Licorice Root, processed), Danggui (Angelicae Sinensis Radix, each 12 zhu), Mangxiao (Natrii Sulfas, 5 zhu), Shigao (Gypsum Fibrosum, 1 liang), Dahuang (Rhubarb Rhizome), Maimendong (Ophiopogonis Radix), Huangqin (Scutellariae Radix), Qianhu (Peucedani Radix), Huanglian (Coptidis Rhizoma, each 6 zhu).
These ten ingredients are cut into small pieces. Boil in three sheng of water until one and a half sheng remains. Administer two ge per dose. Stop administration once bowel movement occurs. Adjust dosage according to age and size.

The *Waitai Miyao* (Secret Essentials of the Outer Cabinet) treats Shanghan to prevent recurrence after healing. Baizhi San (Angelica Dahurica Powder):
Baizhi (Angelicae Dahuricae Radix, 12 fen), Baizhu (Atractylodis Macrocephalae Rhizoma, 10 fen), Gualou (Trichosanthis Fructus, 5 fen), Jiegeng (Platycodonis Radix, 4 fen), Xixin (Asari Radix et Rhizoma, 3 fen), Fuzi (Aconiti Lateralis Radix Praeparata, processed, skin removed), Ganjiang (Zingiberis Rhizoma), Guixin (Cinnamomi Ramulus, each 2 fen), Fangfeng (Saposhnikoviae Radix, 8 fen).
These nine ingredients are crushed and sifted into a powder. Take one qianbi with clear rice gruel. After meals, take two qian; children take one qian. Regularly consume egg soup and glutinous rice porridge, adjusting amounts to suit the patient. It is not strictly necessary to always eat egg soup and glutinous rice; after taking medicine, support the patient to walk, and wash their head and face. Adhere to this diet and activity regimen; frequent walking prevents recurrence. Hao Yun: Frequent use is beneficial; Fan Wang agrees. Avoid pork, peaches, plums, sparrow meat, coriander, garlic greens, fish, raw green onions, and raw vegetables. Another version includes Renshen (Ginseng Radix et Rhizoma) 3 fen.

In the *Huoren Shu*, Zhang Zhongjing's Xiao Chaihu Tang (Minor Bupleurum Decoction) is found in the chapter on Head Sweating in Shanghan.

In the *Huoren Shu*, Zhang Zhongjing's Chaihu Guizhi Tang (Bupleurum and Cinnamon Twig Decoction):
Chaihu (Bupleuri Radix, 2 liang), Banxia (Pinelliae Rhizoma, 3 qian 1 zi, washed), Gancao (Licorice Root, half liang, processed), Guizhi (Cinnamomi Ramulus, bark removed), Huangqin (Scutellariae Radix), Renshen (Ginseng Radix et Rhizoma), Shaoyao (Paeoniae Radix Alba, each 3 fen).
Crush the herbs to the size of hemp seeds. Each dose takes five qianbi, four slices of Shengjiang (Fresh Zingiberis Rhizoma), and one Zao (Jujubae Fructus). Add one and a half dregs of water, boil until eight parts remain. Strain and take warm.

In the *Huoren Shu*, Zhang Zhongjing's Daxiehu Tang (Major Bupleurum Decoction) is found in the chapter on Vomiting in Shanghan.

In the *Huoren Shu*, Zhang Zhongjing's Zhishi Zhizi Tang (Immature Bitter Orange and Gardenia Decoction):
Zhishi (Immature Bitter Orange Fruit, 2 pieces, pith removed, stir-fried with bran), Zhizi (Gardeniae Fructus, 7 pieces, plump ones), Chi (Fermented Soybean, 2 liang).
Take two and a half cups of Qingjiangshui (Clear Fermented Rice Water). Boil empty first, reducing by eight parts. Add Zhishi and Zhizi, cook until nine parts remain. Add Chi and boil for five or six boils. Strain and take warm. Cover to induce sweating. If there is retained food, add Dahuang (Rhubarb Rhizome) pieces the size of five or six chess pieces and decoct together.

In the *Huoren Shu*, Maimendong Tang (Ophiopogon Decoction):
Maimendong (Ophiopogonis Radix, 1 liang), Gancao (Licorice Root, 2 liang).
Crush to the size of hemp seeds. First, take two small cups of water, add half he of Jingmi (Glutinous Rice), and boil until the rice is cooked. Remove the rice; approximately one and a half cups of water remain. Add five qian of the herbal mixture, two Zao (Jujubae Fructus), and fifteen leaves of Zhuye (Bambusae Folium). Boil until one cup remains. Strain and take. If unable to swallow, drip the liquid into the mouth using cotton.

In the *Huoren Shu*, Zhang Zhongjing's Shengjiang Xiexin Tang (Ginger Decoction for Draining the Epigastrium) is found in the chapter on Diarrhea in Shanghan.

In the *Huoren Shu*, citing *Guangji Fang*, Xiongshushi San (Male Rat Dropping Powder):
Xiongshushi (Male Rat Dropping, 14 pieces, those pointed at both ends are authentic), Zhizi (Gardeniae Fructus, 14 pieces, broken apart), Zhike (Aurantii Fructus Immaturus, 2 pieces, processed).
Grind into coarse powder. Each dose is four qian. Add one and a half cups of water, two cun of Congbai (Scallion White), and thirty grains of Chi (Fermented Soybean). Decoct until one cup remains. Divide into two doses. Do not let the patient know the powder contains rat droppings.

In the *Huoren Shu*, citing Xu Renze's Qiwei Congbai Tang (Seven-Ingredient Scallion White Decoction):
Congbai (Scallion White, with roots, cut, half sheng), Gan Ge (Kudzu Root, cut, three he), Xin Chi (Fresh Fermented Soybean, half he, wrapped in silk), Shengjiang (Fresh Zingiberis Rhizoma, cut, one he), Maimendong (Ophiopogonis Radix, heart removed), Sheng Dihuang (Rehmanniae Radix Recens, 3 liang), Laoshui (Labor Water, four sheng, stirred with a ladle one thousand times, named Labor Water).
Take the aforementioned seven herbs. Decoct using Laoshui until two-thirds of the liquid remains. Strain and divide into two doses. Gradually cover to induce sweating.