Gu (poison)
Venom-based poison from south China used in black magic.
Gu, also known as jincan, was a poison made from venom, linked to the cultures of southern China, especially Nanyue. To prepare it, people would seal several poisonous creatures—like centipedes, snakes, and scorpions—inside a closed container. The animals would eat each other, supposedly concentrating their toxins into the last survivor. Larvae then fed on that survivor’s body until it was consumed, and the final larva contained the complex poison. This poison was used in black magic for purposes such as controlling sexual partners, causing illness, or bringing about death. Folklore says a gu spirit could take the form of various animals, often a worm, caterpillar, snake, frog, dog, or pig.
The name gu appears in Shang dynasty oracle bone inscriptions from around the 14th century BCE, while the term jincan, meaning “gold silkworm,” first appears in Tang dynasty texts from the 7th century CE.
The character for gu (蠱) combines the symbol for “wug” (蟲, meaning insects, spiders, small reptiles, or amphibians) with the symbol for a container (皿). Early oracle bone script showed one or two wug elements inside a container, while later seal script had three. Oracle bone inscriptions record gu in 23 instances with two wugs and 4 with one, often in divinations about sickness. According to one scholar, the oracle-bone character for gu referred to the evil power of ancestors to cause illness in the living.
Jincan, a synonym for gu, first appeared in the Tang dynasty. A 7th-century commentary described it as a golden funerary decoration, while a 9th-century author wrote of a legendary golden caterpillar from Kashmir. Among the Miao people, on the fifth day of the fifth month, poisonous animals were put into a pot to devour each other, and the result was called a “gold-silkworm.” It was believed that the more people killed by the gu, the richer its owner became. Over time, the normal term for gu became “gold-silkworm.” These animals were said to make gold, required feeding in a pot, demanded human sacrifices, kept the house clean, worked like a brownie for its master, but harmed the master if not properly sacrificed. For centuries, Miao women in particular were feared for their mastery of gu poison, which was said to kill slowly from a distance.
A Song dynasty description notes that a gold caterpillar had a gold color and was fed with silk from Shu (Sichuan).
- Earliest recorded name
- Gu, circa 14th-century BCE Shang dynasty oracle inscriptions
- First recorded synonym
- Jincan, 7th-century CE Tang dynasty texts
- Associated region
- South China, particularly Nanyue
- Traditional preparation
- Sealing venomous creatures in a container until one survivor remains
- Reported uses
- Black magic, manipulating sexual partners, causing disease and death
- Related term
- Chong (蟲), meaning 'wug' (insects, spiders, small reptiles and amphibians)
Lore & Background
The term gu can be traced from oracle bones until modern times, acquiring many meanings. The oracle-bone character of gu is used to refer to the evil power of the ancestors to cause illness in the living. The Traditional Chinese character 蠱 combines chong (蟲, 'wug') and min (皿, 'container'), forming an ideogram of wugs inside a container. Early written forms range from Oracle bone script to Seal script characters. The Hanyu Da Zidian dictionary defines nine gu meanings, including poisoning from an abdominal wug, a type of artificially cultured poisonous wug, sorcery that harms humans, and seduction.
Reader's Guide
Gu's significance lies in its long history and polysemy, reflecting deep cultural fears of poison, sorcery, and supernatural harm. The practice of preparing gu by sealing venomous creatures together and using the survivor for black magic appears in Chinese folklore for centuries. The term jincan, first recorded in the Tang dynasty, became a synonym and was associated with the Miao people, who were feared for their mastery of gu poison. The Zhouli ritual text describes an official charged with exterminating poisonous gu, indicating its recognized threat. Gu's meanings expanded to include abdominal parasites, dismembered sorcerers' ghosts, and even a hexagram in the Yijing. The Zuozhuan records a physician explaining gu as delusion from excessive sensual indulgence, linking the character to a vessel and insects. This complex legacy shows gu as both a literal poison and a metaphor for corruption and harm.
Did You Know?
- The Zhouli ritual text describes a Shushi official charged with exterminating poisonous gu using spells and efficacious herbs.
- The Bencao Gangmu quotes a 12th-century source stating that gold caterpillars first existed in the Shu region (present-day Sichuan) and later spread to other areas.
- Among the Miao, on the fifth day of the fifth month, poisonous animals were put into a pot and allowed to devour each other, and they were called 'gold-silkworms'.
Frequently Asked Questions
What is Gu (poison) in Chinese folklore?
Gu is a venom-based toxic substance rooted in the folk traditions of southern China, most closely associated with the ancient Nanyue region. It is also called jincan, a synonym that first appeared in Tang dynasty texts of the seventh century CE.
How was Gu (poison) traditionally prepared?
The folk method involved sealing multiple venomous creatures—such as centipedes, snakes, and scorpions—inside a closed vessel so they would devour one another until a single survivor remained. Larvae were then allowed to consume that last creature, and the final larva was said to hold the concentrated, complex toxin.
What was Gu (poison) used for in folklore?
In popular belief, Gu served as a tool of black magic, with reported applications including manipulating or controlling a sexual partner, inducing illness, and ultimately causing death.
How far back does the record of Gu (poison) go?
The name Gu appears in oracle-bone inscriptions from the Shang dynasty, dating to roughly the fourteenth century BCE, making it one of the earliest attested references to this concept. The alternative name jincan, however, does not surface until Tang dynasty writings about a millennium later.
What is the relationship between Gu and the term Chong (蟲)?
Chong, often translated as 'wug,' is a broad category covering insects, spiders, small reptiles, and amphibians, and it forms the conceptual backdrop for Gu because the creatures sealed in the preparation vessel all fall under this class. The association underscores how southern Chinese folk thought linked small, many-legged or scaled animals to potent toxic and magical properties.
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