Li Shizhen

Li Shizhen: The Man Who Checked Everything

He failed the civil service examination three times. In sixteenth-century China that was a closed door on the only respectable career, and the son of a physician who had pushed him toward officialdom was left with the family trade he had been raised to escape. Li Shizhen took it, and then spent twenty-seven years doing something no Chinese scholar had done at that scale: going out to look at the plants himself, and writing down where the books were wrong.

The Wrong Career

Li was born on 3 July 1518 in what is now Qizhou, in Qichun County, Hubei province, into three generations of medicine. His grandfather was a travelling doctor — an occupation of distinctly low social standing. His father was a physician and scholar of some reputation who wrote influential books, and who wanted his son in government service rather than at bedsides.

The examinations settled that. After three failures Li turned to practice, and by his late thirties he was good enough that curing the son of the Prince of Chu brought him an official invitation into the prince's service. From there he obtained a post as assistant president at the Imperial Medical Institute in Beijing — the summit of the profession.

He lasted a year. Then he left the capital and went back to private practice. Nothing in the record suggests disgrace; he simply appears to have wanted the work rather than the office. What he had gained from the year in Beijing was access — to the imperial collections, and to the accumulated pharmacological literature of China.

What Was Wrong With the Books

The *bencao* tradition — China's materia medica — was ancient, revered and riddled with error. Substances had been misidentified for centuries, copied forward from text to text without anyone checking. Names collided. A single plant might appear under three entries as three drugs; three different plants might be collapsed into one.

Li's response was to treat the entire inherited corpus as a claim to be verified rather than a truth to be transmitted. He consulted more than eight hundred books. He also travelled extensively to get firsthand experience of the substances themselves — collecting, observing, questioning farmers, hunters and gatherers about what things actually were and where they actually grew. UNESCO's citation credits him with correcting many past mistakes and misconceptions about the nature of medicinal substances.

The Compendium

The *Bencao Gangmu* took twenty-seven years and three complete revisions. The first draft was finished in 1578.

The finished work contains 1,892 entries, covering roughly 1,800 substances — 1,094 herbs, 444 animal materials and 275 minerals — together with directions for preparing some 11,000 prescriptions, about 8,000 of which had been obscure or unpublished. A revised edition in the following century carried over 1,100 illustrations.

The structural innovation is in the title. *Gangmu* means something like "outline and details": Li broke with the tradition of classifying drugs by their potency alone — the old upper, middle and lower grades — and organised them instead by what they were, into animal, mineral and plant kingdoms, subdivided by source and by characteristics such as habitat or fragrance. It is a taxonomy of things rather than a ranking of effects, and it made the book navigable in a way no *bencao* before it had been.

The contents include descriptions of distillation, and of the use of mercury, ephedrine, chaulmoogra oil, iodine, and smallpox inoculation. UNESCO calls it the most complete and comprehensive medical book ever written in the history of traditional Chinese medicine, and says it heralds the dawning of modern pharmacological studies.

The Ending

He did not see it published. Li Shizhen died in 1593, at seventy-five, before the *Bencao Gangmu* appeared in print. The Ming emperor, presented with the work, showed little interest.

It was not his only book. He wrote eleven others, including *Binhu Maixue*, a study of the pulse, and *Qijing Bamai Kao*, an examination of the eight extraordinary meridians — the second a technical work of a kind that would have made a lesser reputation on its own.

Why Li Is Called a Genius

The faculty is not invention but verification at industrial scale — the willingness to hold roughly two thousand inherited claims up against physical reality, one at a time, for twenty-seven years, and to restructure a whole field once the checking revealed the old arrangement did not hold. Two things make it exceptional. The first is method: eight hundred books cross-read against field observation, in a scholarly culture whose default was to defer to the text. The second is nerve: correcting the classics was not a neutral act, and Li did it comprehensively while holding no institutional position from which to do so. UNESCO's judgement, inscribing the work on the Memory of the World Register in 2011, is that it heralds the dawning of modern pharmacological studies — a claim about method, not about content.

The honest counter-case matters here. The *Bencao Gangmu* is mostly a compilation, and Britannica describes it in part as an assembly of other, smaller works of the same kind; the volume of original discovery is small relative to the volume of curation. Li had no theory of why any drug worked, and his framework remains that of Ming pharmacology, with all its cosmology intact; his corrections are empirical, not explanatory. Plenty of entries preserve material a modern pharmacologist would discard entirely. His achievement is a librarian's and a naturalist's rather than a theorist's — but it is the achievement on which the credibility of an entire tradition still rests.

Legacy

The book outlived the dynasty that ignored it. The *Bencao Gangmu* became the reference work of East Asian pharmacology, the standard against which later materia medica were measured, and it remains in active scholarly use — the copy held by the Library of the China Academy of Chinese Medical Sciences is kept in climate-controlled conditions inside a camphor wood bookcase.

In 2011 UNESCO inscribed it on the Memory of the World Register, on China's 2010 submission, as the record of East Asian pharmaceutical knowledge before the sixteenth century. Li Shizhen, three-time examination failure, is now the name attached to the most comprehensive document his civilisation produced about the natural world.

Achievements

• Notable work: Compendium of Materia Medica
• Fields of research: Chinese herbology and medicine