The canon
伤寒论
The Shanghan Lun, written by Zhang Zhongjing around 200 CE after an epidemic killed most of his own clan, is the first book to work case by case: 398 clauses, each naming a presentation and the formula that answers it. It is where pattern differentiation — bianzheng, the method behind every reading we write — begins.
The occasion
Zhang Zhongjing was an official and a physician in Nanyang, in the last decades of the Han. We know his dates only approximately and his life barely at all. What survives is a preface, and the preface is unusual in the whole of classical Chinese medicine because it explains, in the first person and without ornament, why the book exists.
His clan had been more than two hundred people. In the decade after 196 CE, two-thirds of them died, and by his own count seven in ten of those from what he calls cold damage. He is explicit that he wrote because the physicians around him were working from memory and habit, arguing about lineage, and passing on nothing a stranger could use.
That is the register of the book. It is not a work of theory and it does not open with cosmology. It opens with a man saying that the knowledge was insufficient, that he had gone back to the earlier texts and to what he had seen himself, and that he had written it down so it could be checked.
My clan was once more than two hundred. Since the Jian'an years, in less than ten, two-thirds are gone — and seven in ten of those to cold damage.
What it invented
The Shanghan Lun is built out of short numbered clauses. A clause states what is in front of you — the pulse, the temperature, the sweat, the thirst, the stool, how the person is lying — and then names the formula that belongs to that picture. Very few of them run to more than three lines. The first one is twelve characters long.
This looks obvious now and it was not obvious then. The medical writing before it was arranged by complaint: a chapter on coughs, a chapter on fevers, a recipe under each. Zhang Zhongjing arranged his book by pattern — by the configuration a set of signs makes together — and the same complaint therefore appears in several places under several different names, because a cough with a floating pulse and a cough with a faint one are not the same object.
The consequence is a procedure rather than a list. You do not look up the word for what is wrong. You collect what you can observe, you compare the collection against the named patterns, and the name you arrive at is a decision about what those signs have in common. That procedure is 辨证, bianzheng, telling the pattern apart, and this is the book where it starts.
In taiyang disorder the pulse is floating, the head and the nape are stiff and sore, and there is an aversion to cold.
The scheme
The 398 clauses are filed under six headings, and the six run in an order: from the surface of the body inward, from what is loud and recent to what is quiet and long-standing. A clause belongs to the stage its picture fits, not to the illness a modern reader would name.
How it survived
The book Zhang Zhongjing wrote was called the Shanghan Zabing Lun and it covered both cold damage and the miscellaneous disorders that arrive without one. It did not survive as a single object. Within a century or so the Jin physician Wang Shuhe was collecting what he could find of it, and the two halves went on separately: the cold damage material as the Shanghan Lun, the rest, recovered from a water-damaged copy in the eleventh century, as the Jingui Yaolue 金匮要略, Essentials from the Golden Cabinet.
The version everyone now reads was fixed by the same Song editorial office that corrected the Neijing. In 1065 Lin Yi and his colleagues collated the surviving copies, numbered the clauses and printed the result under state authority. That numbering is why a physician in Hangzhou can say clause 96 to a physician in Kyoto and be understood without further explanation.
Nine hundred years of commentary sit on top of it. Cheng Wuji produced the first line-by-line annotated edition in 1144. In Japan, the eighteenth-century old-formula school threw out most of the later theory and went back to this book alone. It is still assigned coursework, still argued about, and still the text a Chinese medicine student is expected to be able to quote from memory.
In a reading
A Bencao House reading is a small instance of the procedure this book invented. Thirty answers and one photograph go in. What comes back is not a list of your complaints repeated to you — it is a name for the shape those complaints make together, written in the vocabulary of the common patterns, with the reasoning shown so you can disagree with it.
We take the method and we leave the pharmacy. The 112 formulas are the reason the Shanghan Lun mattered in 200 CE and they are not what we send. Nothing on this page is a suggestion that you take anything. What a reading suggests is food, acupressure you apply with your own thumb, and the ordinary furniture of a day — when you eat, when you stop, when you go to bed. How a reading is made sets out each step.
We are also missing something the book assumes. Zhang Zhongjing takes the pulse in three positions at both wrists, and a pulse cannot be sent through a form. We say so in the report, in writing, every time. A reading built on three of the four examinations is a narrower thing than what happens in a room, and it is written to be narrower rather than to pretend otherwise.
Questions
A physician of the late Eastern Han, from Nanyang in what is now Henan, working around 200 CE. Almost nothing is known of his life outside his own preface, which says that his clan once numbered more than two hundred and that two-thirds of it died within ten years. He wrote so the next generation would not start from nothing.
It is a translation of 伤寒, shānghán, and it names a class of disorders that begin with something cold arriving from outside and then move inward through stages. It is a category inside Chinese medicine, not an old word for a modern infection, and the book uses it as a frame for anything that arrives from outside and travels.
Bianzheng, 辨证, is the act of telling a pattern apart: reading a set of signs together and naming the shape they make, rather than naming a thing. The Shanghan Lun is the first book built on it clause by clause, and it is the procedure a Bencao House reading follows on a much smaller scale.
No. We send no herbs and no formulas of any kind, and nothing on this page is a suggestion to take anything. The formulas are what makes the book historically important; what we take from it is the method of naming a pattern from a set of signs. Our suggestions are food, self-applied acupressure and daily rhythm.
It is one of the four required classics in a five-year Chinese medicine degree in China, read in the original with the clause numbers intact. It is also the founding text of the 古方 or old-formula school of Japanese Kampo, which Yoshimasu Todo built in the eighteenth century out of this book and very little else.
The reading
A reading applies the procedure this book invented to what you actually report — and returns a written description of the pattern your answers make, in English, with the working left in.