Chinese Alchemy: External Elixirs, Internal Transformation

The Tang emperor Taizong, who reigned from 626 to 649 CE, was a hard-headed military man who had just finished consolidating the empire after the chaos of the Sui collapse. He was also, by the dynastic histories’ account, a regular consumer of alchemical elixirs prepared for him by court Daoists. The elixirs did not make him immortal. He died in 649, and the standard account of his death is that the cinnabar he was ingesting — mercury sulfide, prepared by repeated sublimation in a sealed vessel — finally caught up with his kidneys. The dynastic histories then record a remarkable pattern. Three more Tang emperors — Xianzong (r. 805–820), Muzong (r. 820–824), and Wuzong (r. 840–846) — died of the same cause. The emperor who was enthusiastic about alchemical elixirs was, with depressing statistical regularity, the emperor who died young. The Chinese alchemical tradition was, in this respect at least, the only major alchemical tradition in which the practitioners routinely killed their patrons with their remedies, and the record is documented in the official histories of the dynasty.

The Chinese alchemical tradition is one of the great alchemical traditions of the world, independently developed and far older than the European alchemical tradition in some of its earliest forms. From the Warring States period through the Qing dynasty, Chinese alchemists pursued the elixir of immortality, the transmutation of base metals into gold, and the integration of the human body with the Dao. The Chinese tradition developed in two main branches: external alchemy (waidan), which sought the elixir through the preparation of mineral and metallic drugs, and internal alchemy (neidan), which mapped those operations onto the body and the breath. The two branches were deeply intertwined with Daoist religion, Chinese medicine, and the broader cosmological traditions of the Chinese world.

This cluster page traces the Chinese alchemical tradition from its origins to the early modern period. It complements the chronological account in the history of alchemy pillar, the cluster on Indian alchemy that treats the parallel South Asian tradition, and the cluster on alchemy and religion that explores the religious dimensions of the alchemical project in different cultural settings.

Origins: the fangshi and the Warring States

The Chinese alchemical tradition emerged in the late Warring States period (fourth to third centuries BCE) and the early Han dynasty (206 BCE – 220 CE). The setting was the world of the fangshi, the “recipe masters” or “technique gentlemen” — a class of itinerant specialists who claimed to possess techniques for longevity, immortality, communication with the spirits, and the transmutation of metals. The fangshi are the Chinese equivalent of the Greek and Egyptian alchemists of the Hellenistic world, and they are the immediate ancestors of the alchemical tradition in its developed form.

The fangshi drew on a body of cosmological and physiological theory that included the yin-yang theory, the five phases (wuxing) of wood, fire, earth, metal, and water, and a sophisticated medical tradition centred on the circulation of qi (vital breath) and the balancing of the bodily humors. The alchemical work of the fangshi combined these theoretical traditions with the practical work of preparing mineral and metallic drugs, especially compounds of mercury, lead, and gold.

The most important early text of the Chinese alchemical tradition is the Cantong qi (“The Kinship of the Three”), traditionally attributed to Wei Boyang (c. 100 CE) but in fact compiled over several centuries, with the earliest strata probably dating to the late Han and the final form to the Tang. The Cantong qi is a dense Daoist treatise that presents the alchemical work as a meditation on the unity of yin and yang, the three cosmic principles (heaven, earth, and human), and the production of the elixir of immortality. The text is foundational for both the external and the internal alchemical traditions, and it remained the most cited alchemical scripture of the Chinese world for nearly two thousand years. Pregadio (ed., The Encyclopedia of Taoism, 2008, vol. 1, pp. 165–169) and Robinet (Les commentaires du Tao tö king, 1977) are the standard references.

External alchemy (waidan): the laboratory tradition

External alchemy, the older of the two main branches, sought the elixir of immortality through the preparation of mineral and metallic drugs. The most important of these drugs were cinnabar (mercury sulfide, the most celebrated alchemical drug, prepared by the controlled heating of mercury and sulfur), gold and gold compounds (taken internally as elixirs or worn as amulets, believed to confer the incorruptibility of the metal on the body of the practitioner), mercury in carefully prepared forms, jade and jade compounds (believed to confer the hardness and purity of the stone on the body), and lead and lead compounds (the foundational metal in the yin-yang theory of metallic composition).

The alchemical preparation of these drugs was a complex, dangerous, and elaborate business. The alchemist worked in a specially constructed laboratory, often on a sacred mountain or in a hidden valley, and the work was accompanied by ritual, prayer, and meditation. The alchemist followed a strict dietary and sexual regimen, observed taboos, and timed the operations by the calendar and the stars. The famous “Nine-Times-Refined Cinnabar” (jiuzhuan dansha) was prepared by a process of repeated sublimation, with the claim that the resulting material could confer immortality on those who ingested it. Several Tang emperors are reported to have done so, with fatal results, and the dynastic histories preserve the record.

The external alchemical tradition reached its high point in the Tang dynasty (618–907 CE). Tang emperors were enthusiastic patrons of the alchemists, and several are recorded as having died from ingesting poisonous elixirs. The most famous of the Tang alchemists is Sun Simiao (581–682), the “Medicine King,” who was also a major medical writer and an important Buddhist figure. Sun was the model of the Daoist physician — learned in the alchemical tradition, sceptical of the more extravagant claims, careful in his pharmacological recommendations — and his work, particularly the Qianjin Yaofang (“Thousand Golden Essential Prescriptions”) and the Qianjin Yifang (“Supplement to the Thousand Golden Prescriptions”), was the standard medical reference for centuries. Needham’s Science and Civilisation in China, vol. 5, pt. 2 (1974), is the older comprehensive reference; Pregadio (2008) is the more recent and reliable one.

Internal alchemy (neidan): the laboratory of the body

Internal alchemy, which developed in the Tang and Song dynasties, mapped the operations of the external alchemist onto the body of the practitioner. The laboratory of the internal alchemist is the body itself; the furnace is the lower abdomen (the dantian, the “cinnabar field”); the elixir is the refined qi produced by meditation, breath control, and visualisation.

The theoretical framework of internal alchemy draws on the same yin-yang and five phases theory as the external tradition, but it integrates these with the cosmological and physiological theories of the Daoist religion. The internal alchemist aims at the integration of the jing (essence), qi (breath), and shen (spirit), the three cosmic principles that are the inner counterparts of the three external alchemical agents (mercury, lead, and salt, or cinnabar, lead, and gold, depending on the school). The theoretical mapping is explicit, and the practitioner is meant to know which external operation corresponds to which stage of the inner work.

The practice of internal alchemy involves a series of stages, often described as the xiǎo zhōutiān (小周天, “small celestial circuit”) and the dà zhōutiān (大周天, “great celestial circuit”). The small celestial circuit involves the circulation of qi through the two main channels of the body, the ren mai (the “conception vessel” running up the front of the body) and the du mai (the “governing vessel” running up the spine). The great celestial circuit involves the circulation of qi through all the channels of the body and the integration of the practitioner’s qi with the qi of the cosmos. The standard scholarly romanisation of these terms adds the -tiān (“heaven/celestial”) suffix to distinguish the technical physiological circuit from the bare cosmographical “circulation.”

The internal alchemical tradition is also notable for its sophisticated account of the stages of practice. The work is often described as the refinement of the three treasures: the jing (essence) is refined into qi (breath), the qi is refined into shen (spirit), and the shen is refined into the Dao. The culmination is the production of the shèngtāi (聖胎, “spiritual embryo”), a transformed state of consciousness and corporeity that transcends the ordinary human condition. The internal alchemist who completes the work is understood to have achieved the same state as the highest immortals of the Daoist tradition.

The most important of the internal alchemical traditions is the Complete Perfection (Quanzhen) school of Daoism, founded by Wang Chongyang (1113–1170) in the Song dynasty. The Complete Perfection school integrated internal alchemy with Chan (Zen) Buddhist meditation and Confucian ethical cultivation, and it became one of the two main branches of Daoist religion in the later imperial period. The other main branch, the Orthodox Unity (Zhengyi) school, is primarily liturgical and sacramental rather than alchemical, though it preserves a substantial body of internal alchemical theory. The Xingming guizhi (“The Compass of the Nature and the Destiny”), a Song-dynasty treatise that integrates the alchemical and the Confucian traditions, is one of the most important texts of the Chinese alchemical inheritance.

The Daoist context

The Chinese alchemical tradition was deeply integrated with Daoist religion, and the integration is the key to understanding the tradition on its own terms. The alchemist, in the Daoist tradition, is a sage who has cultivated the Dao and is engaged in the work of self-perfection. The alchemical operations are simultaneously physical, mental, and spiritual exercises, and the alchemical work is a participation in the cosmic process of transformation.

The Daoist cosmological framework underwrites the alchemical theory. The Dao is the source and the goal of all transformation. Yin and yang are the two complementary aspects of the Dao, and the alchemical work is the integration of yin and yang within the body of the practitioner. The five phases — wood, fire, earth, metal, and water — are the five basic processes of transformation, and the alchemical work is the harmonisation of the practitioner’s bodily processes with the cosmic processes.

The Daoist religious framework also includes a rich tradition of sacred geography, ritual, and meditation. The alchemical laboratory is often located on a sacred mountain — the great Daoist mountains of the south (Longhu, Qiyun, Wudang) and the north (Mao, Lao) — and the alchemist’s work is integrated with the local religious traditions. The Daoist priest performs rituals for the local community, the alchemist prepares medicines and elixirs for the elite, and the two roles are often combined in the same person. The alchemist-priest is as central to the Chinese tradition as to the Christian one, and the figure of Sun Simiao is the most fully realised example.

The elixirs in practice: poison and panacea

The Chinese alchemical elixirs were real substances, prepared by elaborate laboratory procedures, and the recipes are preserved in the surviving texts. The most famous is the “Nine-Times-Refined Cinnabar,” a preparation of cinnabar that was refined by a process of repeated sublimation. The alchemists claimed that the Nine-Times-Refined Cinnabar could confer immortality on those who ingested it. Several Tang emperors are reported to have done so, with fatal results. Other famous elixirs include the “Gold Liquid” (jinye), a preparation of soluble gold in a sweetened or acidulated liquid; the “Jade Spring” (yuquan), a preparation of jade in water; and various preparations of mercury, lead, and other metals.

The toxicity of many of the Chinese elixirs is one of the most striking features of the external alchemical tradition, and the record is sobering. Cinnabar, mercury, and lead are all toxic, and many alchemists and their patrons died from ingesting them. The internal alchemical tradition developed, in part, as a response to the toxicity of the external elixirs: the inner elixir is the refined qi of the body, and it does not involve the ingestion of toxic metals. The development of neidan out of waidan is, in a sense, the Chinese alchemical tradition’s response to its own clinical failures, and the development is one of the more interesting stories in the history of science.

The decline and revival

The external alchemical tradition declined in the Song and Yuan dynasties, in part because of the toxicity of the elixirs and in part because of the rise of internal alchemy. The internal alchemical tradition continued to flourish through the Ming and Qing dynasties, and it remains a living tradition within Daoist monasticism. The Complete Perfection and Orthodox Unity schools both preserve substantial alchemical lineages, and the alchemical texts are still studied in the Daoist monasteries of the south.

The modern revival of interest in Chinese alchemy is part of a broader revival of Daoist religion and Chinese traditional medicine. The alchemical texts are being re-edited and studied, the alchemical practices are being revived in some Daoist monasteries, and the alchemical framework is being integrated with modern Chinese medicine, pharmacology, and psychology. The Chinese alchemical tradition is, in other words, a living part of the contemporary Chinese religious and medical landscape. The alchemical texts are read in Daoist seminaries; the alchemical practices are taught in Daoist monasteries; the alchemical framework is invoked in debates about the integration of traditional and modern medicine in China.

Chinese alchemy and the Western tradition

The Chinese and Western alchemical traditions developed independently and remained largely isolated from one another until the modern period. The parallels are striking, but the parallels are not evidence of transmission. The Chinese and Western alchemical traditions both developed an elaborate theory of metallic composition, with similar schemes of yin-yang or male-female principles. Both sought the elixir of immortality, and both associated the elixir with the philosopher’s stone of the Western tradition. Both developed a sophisticated symbolism of colour, planetary and stellar influences, and the transformation of the practitioner.

The parallels are probably the result of independent development rather than transmission. The Chinese and Western alchemical traditions both emerged in the context of mature civilisations with sophisticated metallurgical and pharmacological traditions, and both addressed similar human questions about longevity, the nature of matter, and the possibility of transcendence. The historian who wants to argue for transmission needs better evidence than the parallels provide, and the parallels, taken alone, are not enough. The working position, I think, is that the two traditions developed in parallel, with some shared motifs in the theory of metallic composition, and were brought into direct contact only in the early modern period through the European study of Chinese religion and medicine.

FAQ

Q: What is the Cantong qi? A: A dense Daoist alchemical treatise traditionally attributed to Wei Boyang (c. 100 CE) but in fact compiled over several centuries. It presents the alchemical work as a meditation on the unity of yin and yang and the production of the elixir, and is foundational for both waidan and neidan (Pregadio, 2008).

Q: Which Tang emperors died from elixir poisoning? A: Taizong (r. 626–649), Xianzong (r. 805–820), Muzong (r. 820–824), and Wuzong (r. 840–846). The dynastic histories are the source, and the record is reliable.

Q: What is the small and great celestial circuit? A: The xiǎo zhōutiān (小周天) and dà zhōutiān (大周天) are the two main stages of neidan practice. The small celestial circuit circulates qi through the ren and du vessels (the conception and governing channels); the great celestial circuit extends the circulation to all the channels of the body.

Q: What is the spiritual embryo? A: The shèngtāi (聖胎) is the transformed state of consciousness produced when the practitioner refines jing into qi, qi into shen, and shen into the Dao. It marks the culmination of the neidan practice.