Cannabis in Ancient China
Hemp domestication, fiber production, and separating historical fact from legendary folklore.
The 'Emperor Shennong discovered cannabis medicine in 2737 BCE' story is marketing folklore—Shennong is mythological, and the *Bencao Jing* was compiled 2,500 years later. What's real: hemp was domesticated in Neolithic China and used for fiber, seeds, and paper for millennia. Psychoactive use left scarce traces—a single brazier with burnt THC residue proves it happened around 500 BCE, but widespread recreational use came only after tobacco arrived from the Americas.
What the archaeology actually shows
The oldest physical evidence of cannabis in China is not ritual items or medicine bottles—it is fiber and cord. Hemp cord impressions on Yangshao culture pottery from the Yellow River valley date to roughly 4000 BCE, and a hemp fiber fragment from Gansu province falls within a similar timeframe Strong evidence[1]. A 2021 genomic study of modern cultivars concluded that all extant hemp and drug-type cannabis lineages originated in early Neolithic China Strong evidence[2].
Throughout Chinese prehistory and early history, cannabis functioned as a utilitarian crop. The plant supplied bast fiber for rope, cloth, fishing nets, and eventually paper; the seeds (huǒmá rén, 火麻仁) were eaten as grain. The character 麻 (má) appears on oracle bones from the Shang dynasty (c. 1200 BCE) and refers to this fiber and seed plant Strong evidence.
Psychoactive use is far more sparsely documented. The clearest evidence comes from the Jirzankal Cemetery on the Pamir Plateau in Xinjiang, where researchers in 2019 identified wooden braziers containing burnt Cannabis residue with elevated cannabinol (CBN, a THC breakdown product) dated to around 500 BCE Strong evidence[3]. The study authors interpret this as intentional burning of high-THC plants in a funerary ritual—a narrow but archaeologically sound case.
The Shennong myth and the 'Divine Farmer's Materia Medica'
Almost every popular account of cannabis history repeats: "In 2737 BCE, Emperor Shennong listed cannabis as a treatment for over 100 ailments." This claim is layered folklore Disputed.
First, Shennong (神農, 'Divine Farmer') is a mythological culture hero, not a historical emperor. Second, the Shennong Bencao Jing (神農本草經, Divine Farmer's Materia Medica) attributed to him was compiled by anonymous authors during the Eastern Han dynasty, roughly the 1st–2nd century CE—more than two millennia after Shennong's legendary era Strong evidence[4]. The original Han text is lost; what survives is a reconstruction by Tao Hongjing from around 500 CE.
The Bencao Jing does mention má (cannabis)—specifically the seeds (máren) and flowering tops (mábo or máfen)—and records that prolonged use of the flowers can cause one to 'see ghosts and run about frantically' (見鬼狂走), with hints at spirit communication Strong evidence[4]. This is a genuine primary-source acknowledgement of psychoactivity. However, it is not a comprehensive chart for '100 ailments' and certainly not dated to 2737 BCE.
The '100 ailments' phrasing appears to have entered English-language cannabis literature through Ernest Abel's 1980 book Marihuana: The First Twelve Thousand Years and similar popular histories, and has been repeated without independent verification ever since Weak / limited[5].
Hua Tuo and the cannabis anesthetic mystery
A second pervasive claim: the legendary Han surgeon Hua Tuo (c. 140–208 CE) performed operations using a cannabis-based anesthetic called mafeisan (麻沸散, literally 'cannabis boil powder'). The Records of the Three Kingdoms and the Book of the Later Han describe Hua Tuo dissolving mafeisan in wine before surgery Weak / limited[6].
The critical problem: the actual recipe for mafeisan was never recorded. It was lost when Hua Tuo was executed. The character 麻 in mafeisan means 'numb' or 'hemp,' but Chinese pharmacology uses 麻 in compound names for many numbing and psychoactive plants. Modern pharmacological reviews have proposed datura, aconite, and rhododendron as more plausible primary active ingredients based on their known anesthetic properties Weak / limited[7]. Cannabis may have been one ingredient; it may not have been at all. Honest scholarship admits the recipe is unknown.
This is a case where legend and fragmentary historical record have been conflated with modern assumption. The honest answer: we cannot confirm what was in mafeisan.
Documented uses of cannabis in ancient China
Setting aside folklore, the archaeological and textual record shows these uses:
Fiber and textiles. Hemp was classified among the 'five grains' (五穀) in some early schemes and remained the dominant textile fiber until cotton arrived in the late medieval period. Commoners wore hemp cloth; silk was reserved for elites Strong evidence.
Food and nutrition. Hemp seeds (huǒmá rén) were eaten as grain and pressed for oil. They appear in later Chinese medical texts as a mild laxative and tonic Strong evidence.
Paper production. Some of the earliest surviving paper fragments from the Western Han dynasty (2nd century BCE) contain hemp fiber Strong evidence[1].
Ritual and shamanic practice. The Jirzankal braziers provide the strongest archaeological evidence; textual allusions in the Bencao Jing to 'seeing ghosts' suggest awareness of psychoactive effects, possibly in Daoist or shamanic contexts Weak / limited[3][4].
Medicine. Seeds were used for constipation and as a general tonic; the flowering tops were occasionally noted in medical texts but accompanied by explicit warnings about toxicity Weak / limited[4].
Notably absent from the record is any tradition of widespread recreational smoking. Smoking as a delivery method arrived in East Asia only after tobacco came from the Americas in the 16th–17th centuries Strong evidence[8]. Earlier psychoactive use, where documented, occurred via combustion in braziers, ingestion, or infusion.
Reading the sources critically
When evaluating claims about cannabis in ancient China, apply these principles:
1. Dates attached to mythological figures are not historical dates. Shennong, the Yellow Emperor, and Fuxi are cultural archetypes, not dated historical persons. '2737 BCE' is a number, not a fact.
2. Compilation date matters more than attribution. The Shennong Bencao Jing reflects Han-dynasty physician knowledge and belief, not Neolithic reality. Knowing when a text was written is essential to interpreting what it means.
3. The character 麻 (má) is polysemous. In classical Chinese it can refer to cannabis, ramie, flax, or 'numb' depending on context. Translators and authors sometimes collapse these distinctions, creating false precision.
4. Archaeological residue is harder evidence than later text. Carbonized cannabinoid molecules recovered from a securely dated brazier carry more weight than a reference in a document compiled centuries later and transmitted through multiple scribal copies.
Sources
- Peer-reviewed Li, H.-L. (1974). An archaeological and historical account of cannabis in China. Economic Botany, 28(4), 437–448.
- Peer-reviewed Ren, G., Zhang, X., Li, Y., et al. (2021). Large-scale whole-genome resequencing unravels the domestication history of Cannabis sativa. Science Advances, 7(29), eabg2286.
- Peer-reviewed Ren, M., Tang, Z., Wu, X., et al. (2019). The origins of cannabis smoking: Chemical residue evidence from the first millennium BCE in the Pamirs. Science Advances, 5(6), eaaw1391.
- Book Yang, S. (trans.) (1998). The Divine Farmer's Materia Medica: A Translation of the Shen Nong Ben Cao Jing. Blue Poppy Press.
- Book Abel, E. L. (1980). Marihuana: The First Twelve Thousand Years. Plenum Press.
- Book Chen, Shou (3rd century CE). Sanguozhi (Records of the Three Kingdoms), Biography of Hua Tuo, Book of Wei, Vol. 29.
- Peer-reviewed Chen, Y., Wang, J. (2018). Hua Tuo's mafeisan: A historical and pharmacological review. Journal of Anesthesia History, 4(2), 99–104.
- Peer-reviewed Russo, E. B. (2007). History of cannabis and its preparations in saga, science, and sobriquet. Chemistry & Biodiversity, 4(8), 1614–1648.
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