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The Qihai (Sea of Qi) acupoint, known in Daoism as the Dantian (Elixir Field), is located 1.5 cun below the umbilicus and is the site where the Qi of the Ren Mai (Conception Vessel) emerges. It treats cold qi rushing upward from below the umbilicus and the formation of palpable masses due to Qi stagnation in the epigastrium.

It is indicated for cases following Shanghan (Cold Damage) where sweating has damaged the Spleen and Stomach by exposure to cold foods, resulting in discomfort in the chest and diaphragm, as well as general disharmony of Blood and Qi. The appropriate prescription is Bupi Tang (Spleen-Supplementing Decoction). (This is identical to Zhizhong Tang).

Renshen (Ginseng Radix et Rhizoma, remove the rhizome), Ganjiang (Zingiberis Rhizoma, processed), Baizhu (Atractylodis Macrocephalae Rhizoma), Gancao (Licorice Root, honey-fried), Chenpi (Citri Reticulatae Pericarpium, remove the white pith), Qingpi (Citri Reticulatae Pericarpium Viride, remove the white pith), all in equal parts.
Grind into a fine powder. Take 3 qian per dose with one cup of water, boil briefly, and take warm. Adding salt is also acceptable.

I once recorded a case of a patient who, several days after sweating out a Shanghan condition, suddenly developed fever and spontaneous sweating. The pulse was wiry and rapid, and the heart felt restless. This was a true case of Laofu (Relapse due to overexertion). I diagnosed it as caused by mental overexertion.

Zhimu (Anemarrhenae Rhizoma, 1 liang 5 qian), Gancao (Licorice Root, half a liang, honey-fried), Shigao (Gypsum Fibrosum, 4 liang, crushed and wrapped in cotton), Jingmi (Oryza Sativa, 1 he 5 sheng).
Cut into pieces the size of hemp seeds. Take 5 qian per dose with one cup of water, boil until reduced to 80%, strain, and take warm.

A patient presented with headache, fever, restlessness, and thirst. Upon examination, the pulse was large but empty. I prescribed Baihu Tang (White Tiger Decoction), which cured him after several doses. Zhang Zhongjing stated: "Empty pulse with body heat indicates injury from Summerheat." He further asked: "Why would the pulse be wiry, thin, knotted, or slow?" The *Suwen* states: "Cold injures the form; Heat injures the Qi." Since Heat injures the Qi without injuring the form, the depletion of Qi leads to an empty pulse, which is evident.

(The formula is mentioned earlier.)

A patient suffered from Shanghan with fever and headache. I examined him and said: "The pathogen is in the exterior; this is an Exterior Excess pattern, and should be treated with Mahuang Tang (Ephedra Decoction) to induce sweating." Someone asked: "Shanghan inevitably leads to deficiency-cold..." (Text fragmentary).

Chaihu (Bupleuri Radix, 2 liang, remove sprouts, wash clean), Huangqin (Scutellariae Radix, remove skin), Renshen (Ginseng Radix et Rhizoma, remove rhizome), Gancao (Licorice Root, each 3 fen, honey-fried), Banxia (Pinelliae Rhizoma, 6 qian 1 zi, washed seven times in decoction).
Crush into coarse particles. Take 5 qian per dose with 1.5 cups of water, five slices of fresh ginger, and two dates. Boil until reduced to 80%, strain, and take warm. Three times daily. If... (Text fragmentary)... combine with previous... add Muli (Ostreae Concha)... add Guizhi (Cinnamomi Ramulus) 3 qian...

A patient suffered from Shanghan and subsequently experienced sweating and abdominal fullness... (Text fragmentary)... indicating Yin. Although the pulse was deep... (Text fragmentary)... recovered. Zhang Zhongjing refers to this as Yangwei Jie (Yang slight knotting), which must be... (Text fragmentary)... interior. This is semi-... (Text fragmentary)... knowing it is not Shaoyin disease.

Zhang Zhongjing said: "... (Text fragmentary)... sweating, therefore knowing it is not... (Text fragmentary)... cold, pulse deep and tight... (Text fragmentary)... Qi returns to the chest... (Text fragmentary)... thus Zhang Zhongjing... (Text fragmentary)... Kidney is Foot-Shaoyin..." (Text fragmentary)