The Legendary and Historical Origins of Green Tea

Green tea originates from China, with its discovery rooted in the popular folk legend of Emperor Shennong around 2737 BCE, while archaeological evidence confirms its consumption as early as 2,400 years ago. This article will explore the dual origins of green tea, examining both the enduring myths and the concrete scientific findings. Green tea is defined as a type of tea made from the leaves and buds of the Camellia sinensis plant that has not undergone the same withering and oxidation process used to make oolong and black teas. This distinction is central to its history, which begins with medicinal use and evolves into a globally cherished beverage. Key Points:

The Legend of Shennong: Chinese mythology credits the discovery of tea to the Emperor Shennong, a divine farmer and father of traditional medicine. The most common version of the tale states that while boiling water in the forest, leaves from a wild tea tree fell into his pot. After drinking the infused water, he felt refreshed and energized, discovering tea’s medicinal properties. Another version claims that Shennong, who had a transparent stomach to observe the effects of herbs, used tea as an antidote after being poisoned from tasting various plants.
Earliest Archaeological Evidence: The oldest confirmed physical evidence of tea was found in a royal tomb in Zoucheng, Shandong province, dating back to the early Warring States Period (c. 453–410 BCE). Scientific analysis of charred residue in a bowl confirmed the presence of brewed tea. Further evidence from the tomb of Han Dynasty Emperor Jing (d. 141 BCE) revealed high-quality tea buds, indicating that tea was a valued commodity among royalty over 2,100 years ago.
Early Textual Records: Before the character for tea (茶, chá) was standardized during the Tang Dynasty, the word was written as “荼” (tú). The earliest textual references appear in classic texts like the Shijing (Classic of Poetry) and the Erya, a dictionary from the 3rd-2nd century BCE, which identifies “荼” as a bitter herb. By the Han Dynasty, texts like the Tóng Yuē (Slave Contract) mention “boiling tea” and “buying tea,” indicating it had become a traded commodity.

In summary, the story of green tea begins in the mists of Chinese legend with the mythical Emperor Shennong. This mythological origin is now supported by substantial archaeological and textual evidence, which firmly places the roots of tea cultivation and consumption in ancient China, thousands of years before it became a global phenomenon. The following sections will delve deeper into these legendary tales, the scientific analysis of ancient tea, and the evolution of its use from medicine to a cultural staple.

Legend of Emperor Shennong

The origin of tea is steeped in a rich tapestry of Chinese folklore, with the most prominent tale centered on the mythical Emperor Shennong (神农), the Divine Farmer. Revered as the father of Chinese agriculture and traditional medicine, Shennong is said to have lived around 2737 BCE. His legends form the foundational narrative for tea’s discovery, intertwining its identity with health, nature, and serendipity.

The Discovery Myths

While several versions of the legend exist, they all attribute the discovery of tea to Shennong’s tireless efforts to identify the properties of plants. The most popular variations of the story each emphasize a different aspect of tea’s character.

The Serendipitous Scholar: In one popular version, Emperor Shennong was boiling water in a forest to ensure its purity. A few leaves from a nearby wild tea tree (Camellia sinensis) drifted down and fell into his pot. Curious about the fragrant aroma and amber color of the water, he drank it and found it not only refreshing but also mentally invigorating. This version highlights the accidental, natural discovery of tea as a pleasant beverage.
The Divine Antidote: Another, more dramatic, version claims Shennong had a transparent stomach, which allowed him to observe the effects of various herbs on his own body. His quest to catalog medicinal plants led him to taste hundreds of herbs, and one day he was poisoned by 72 different toxic plants. As he lay dying, a tea leaf fell into his mouth. He chewed on it, and its juice revived him, neutralizing all the poisons. This tale establishes tea’s primary role as a powerful detoxifying agent and medicine.
The Cautious Observer: A third variation combines elements of the others. In this telling, Shennong used his transparent abdomen to witness how the leaves from a particular tree, which he named “查” (chá, meaning to investigate), traveled through his system and seemed to inspect and cleanse every part. This narrative underscores tea’s role as a cleansing and balancing herb.

Variations of the Shennong Legend

Legend Variation	Core Narrative	Symbolic Meaning
Serendipitous Discovery	Wild tea leaves accidentally fall into the Emperor’s boiling water, creating a pleasant and stimulating drink.	Tea’s discovery was a gift of nature; its primary function is refreshment and pleasure.
The Divine Antidote	After being poisoned by 72 herbs, Shennong is saved by chewing on a tea leaf that falls into his mouth.	Tea is a powerful medicine and antidote, a “divine remedy” for human ailments.
The Transparent Observer	Shennong, with his transparent stomach, observes tea leaves cleansing his body internally, naming the plant “to investigate”.	Tea is a proactive agent for wellness, promoting internal balance and health.
Early Name	Pinyin	Meaning / Context	Source Text
荼	tú	The most common early term, meaning “bitter herb” or tea.	Shijing, Erya
槚	jiǎ	An alternative name for the tea plant, defined as “bitter tea.”	Erya
茗	míng	Tea picked late in the season; later became an elegant term for tea.	Guo Pu’s Erya Commentary
荈	chuǎn	An alternative name, possibly for coarse or old tea leaves.	Guo Pu’s Erya Commentary
蔎	shè	A regional dialect name for tea used in southwest China.	Fangyan (a dictionary of dialects)

Literary and Historical Context

The most famous line associated with the legend is “神农尝百草，一日遇七十二毒，得荼而解之” (Shénnóng cháng bǎi cǎo, yī rì yù qīshí’èr dú, dé tú ér jiě zhī) — “Shennong tasted a hundred herbs, in one day he encountered seventy-two poisons, and he got tea to resolve them”.

While this phrase is widely quoted, it does not appear in the original Shennong Ben Cao Jing (The Divine Farmer’s Materia Medica), a foundational text of Chinese herbalism compiled in the late Han Dynasty. The earliest known textual source that explicitly connects Shennong, poison, and tea as the antidote is the Qing Dynasty text Gezhi Jingyuan.

Earlier texts lay the groundwork for the legend. The Tang Dynasty (618-907 CE) work Cha Jing (The Classic of Tea) by Lu Yu is the first to definitively state, “The drinking of tea began with Shennong”. However, Lu Yu does not recount the poisoning story. Going back further, the Han Dynasty (206 BCE – 220 CE) text Huainanzi mentions that “Shennong tasted the flavor of the hundred herbs, encountering seventy poisons in one day,” but it makes no mention of tea as the cure.

These literary breadcrumbs show that the legend was not a single event but an evolving narrative. The association of Shennong with herbalism, the idea of him being poisoned, and the attribution of tea’s origin to him all existed in separate threads before being woven together over centuries into the complete, dramatic tale known today.

Archaeological Evidence of Early Green Tea

While legends provide a cultural birth for tea, scientific analysis of archaeological discoveries offers concrete proof of its ancient origins. Through advanced biomolecular and microfossil analysis, researchers have identified physical tea remains dating back over two millennia, confirming its use long before it was widely documented in historical texts. These findings not only validate tea’s Chinese origins but also provide insights into its early status as a valued commodity.

The World’s Oldest Tea: Zoucheng

The earliest confirmed physical evidence of tea was discovered in a royal tomb in Zoucheng, Shandong province, dating to the early Warring States Period (approximately 453–410 BCE). This finding pushes back the timeline of tea consumption by roughly 300 years from previously held records.

The Discovery: Archaeologists found charred residue inside a small porcelain bowl within the tomb, which belonged to the ancient Zhu Kingdom. The contents were hypothesized to be the dregs of a brewed beverage.
Scientific Verification: To confirm the identity of the residue, scientists employed a multi-faceted approach:
- Biomarker Analysis: Using Gas Chromatography-Mass Spectrometry (GC/MS), researchers detected the presence of caffeine, a key alkaloid and definitive biomarker for tea.
- Phytolith Analysis: The sample contained abundant calcium phytoliths, microscopic mineral deposits whose shape is characteristic of the Camellia genus, to which tea plants belong.
- Infrared Spectroscopy: Fourier Transform Infrared Spectroscopy (FTIR) revealed that the chemical signature of the ancient residue closely matched that of modern brewed tea residue, confirming its identity.

This evidence strongly indicates that tea was being brewed and consumed as a beverage in northern China at least 2,400 years ago.

Imperial Tea of the Han Dynasty

Further compelling evidence comes from the Han Yangling Mausoleum in Xi’an, the tomb complex of Han Dynasty Emperor Jing (Liu Qi), who died in 141 BCE. This discovery is significant because it contained not just residue, but actual plant matter.

The Findings: Preserved among the emperor’s burial goods were clumps of plant material identified as tea. Unlike the charred remains from Zoucheng, these were composed almost entirely of fine tea buds, the youngest, most tender part of the tea plant, signifying a very high-quality product reserved for royalty.
Chemical Confirmation: Analysis using ultra-performance liquid chromatography-mass spectrometry (UPLC-MS) confirmed the presence of both caffeine and theanine, an amino acid uniquely abundant in tea plants (Camellia sinensis). The presence of theanine provided unequivocal proof that the plant matter was tea.

These imperial tea buds, dating back over 2,100 years, demonstrate that tea was not only consumed but was also a luxury good, cultivated and processed to a high standard for the Han Dynasty elite.

Tea on the Silk Road

Archaeological work has also traced the early trade of tea. In the Gurgyam Cemetery in Ngari, western Tibet, researchers analyzed plant remains from a tomb dating to the 2nd-3rd century CE. Using the same biomolecular and phytolith analysis techniques, they confirmed the presence of tea. This discovery provides the earliest physical evidence that tea was being transported over long distances, likely along an early branch of the Silk Road, centuries earlier than historical texts had suggested.

Early Textual Records

Long before archaeological science could confirm the physical existence of ancient tea, its presence was recorded in the classical literature of China. These early texts provide invaluable insight into how tea was perceived, named, and used in the centuries leading up to the Tang Dynasty (618–907 CE), when its culture became firmly established. The evolution of the very word for tea is a central part of this story.

The Evolution of “荼” (Tú) to “茶” (Chá)

In pre-Tang literature, the character now universally recognized as “茶” (chá) was most often written as “荼” (tú). Originally, “荼” was a general term for any bitter vegetable or herb. However, context in several key texts makes it clear that one of its primary meanings was the plant we now know as tea. The transition to the simplified character “茶,” which removed one horizontal stroke, became standardized during the Tang Dynasty, largely due to its use in Lu Yu’s seminal work, The Classic of Tea (Cha Jing).

Mentions in Pre-Qin and Han Literature

The earliest textual references to tea are found in some of China’s most foundational literary and lexicographical works. These records show that tea was known and consumed, at least in some form, as early as the Zhou Dynasty (c. 1046–256 BCE).

Shijing (Classic of Poetry): Believed to be compiled around the 11th to 7th centuries BCE, the Shijing contains what many scholars consider the first poetic reference to tea. A line in the poem “Gǔ Fēng” (谷风) reads: “谁谓荼苦？其甘如荠” (Shuí wèi tú kǔ? Qí gān rú jì), which translates to, “Who says tea is bitter? It is as sweet as shepherd’s purse”. This verse not only uses the character “荼” but also comments on its flavor profile, suggesting it was consumed and appreciated.
Erya (The Literary Expositor): As the oldest surviving Chinese dictionary, compiled between the 3rd and 2nd centuries BCE, the Erya provides a critical lexicographical link. In its chapter on plants, it states: “槚，苦荼” (Jiǎ, kǔ tú), identifying the character “槚” (jiǎ) as “bitter tea”. This entry is one of the most definitive early records classifying tea as a specific type of plant.
Tóng Yuē (Slave Contract): This Han Dynasty text, written by Wang Bao around 59 BCE, offers the first clear evidence of tea as a traded commodity and a part of daily life. The contract lists duties for a servant, including to “烹荼尽具” (pēng tú jìn jù – boil the tea and prepare all the utensils) and “武阳买荼” (Wǔyáng mǎi tú – buy tea in Wuyang). These phrases indicate that tea was not just foraged but was available in markets and required specific preparation.

Early Commentaries and Definitions

Later scholars in the Han and post-Han periods expanded on these early references, adding detail about the plant itself and its various names.

Guo Pu’s Annotation of the Erya

The Jin Dynasty scholar Guo Pu (276–324 CE) wrote an influential commentary on the Erya that provided the most detailed description of tea before the Tang Dynasty. He elaborated on the entry “槚，苦荼” with the following:

“The tree is small like a gardenia, its leaves grow in winter, and it can be boiled into a soup to drink. What is picked early is called ‘荼’ (tú), and what is picked late is called ‘茗’ (míng). Another name for it is ‘荈’ (chuǎn). The people of Shu (modern Sichuan) call it ‘苦茶’ (kǔ chá – bitter tea).”

This commentary is exceptionally important for several reasons:

Botanical Description: It gives a physical description of the tea plant (“small like a gardenia”) and notes its evergreen nature (“leaves grow in winter”).
Method of Consumption: It confirms the practice of boiling the leaves to make a beverage (“can be boiled into a soup to drink”).
Varietal Names: It introduces different names for tea based on the harvest time, establishing “茗” (míng) as a term for later-picked, or perhaps more mature, leaves.

Other Early Names for Tea

Guo Pu’s commentary highlights that “tea” had several names in early China, reflecting regional dialects and different states of the leaf.

| Early Name | Pinyin | Meaning / Context | Source Text | | :— | :— | :— | :— | | 荼 | tú | The most common early term, meaning “bitter herb” or tea. | Shijing, Erya | | 槚 | jiǎ | An alternative name for the tea plant, defined as “bitter tea.” | Erya | | 茗 | míng | Tea picked late in the season; later became an elegant term for tea. | Guo Pu’s Erya Commentary | | 荈 | chuǎn | An alternative name, possibly for coarse or old tea leaves. | Guo Pu’s Erya Commentary | | 蔎 | shè | A regional dialect name for tea used in southwest China. | Fangyan (a dictionary of dialects) |

Cultural Significance and Evolution

From its origins as a medicinal herb to its status as a refined beverage, the consumption and processing of green tea evolved significantly in the centuries leading up to the Tang Dynasty. This period saw tea transition from a simple folk remedy into a staple of elite culture, setting the stage for its eventual widespread popularity. The development of new processing techniques and the emergence of a distinct tea etiquette were crucial to this transformation.

From Medicinal Food to Beverage

In its earliest stages, tea was not primarily a beverage but a form of food and medicine. Early texts describe methods that are far removed from modern brewing.

Medicinal Soups and Pastes: The Jin Dynasty scholar Guo Pu noted that tea leaves could be “boiled into a soup to drink” (可煮羹饮). This suggests a thick, soupy concoction rather than a clear infusion. Other methods involved chewing fresh leaves or pounding them into a paste for direct consumption or application.
A Regional Tonic: During the Han Dynasty, tea consumption was largely confined to the south, particularly the Shu region (modern Sichuan). It was valued by Buddhist monks as a stimulant to aid in meditation and was slowly adopted by scholars and aristocrats as a healthful tonic.

The shift from a bitter medicinal soup to a more palatable beverage was gradual. As its use spread among the elite during the Six Dynasties (220–589 CE), the focus began to shift from pure medicinal benefit to include enjoyment and social ritual.

The Rise of Cake Tea (饼茶)

A critical innovation that facilitated tea’s spread and cultural development was the processing of leaves into compressed cakes (饼茶, bǐngchá). This method emerged as the dominant form of tea production before the Tang Dynasty. While pre-Tang texts lack detailed step-by-step guides, the process generally involved several key stages.

Steaming (蒸青): Freshly picked leaves were steamed. This crucial step, known as “kill-green” (杀青), deactivates the enzymes responsible for oxidation, preserving the tea’s green color and fresh characteristics. This is the foundational process that defines green tea.
Pounding and Pressing: The steamed leaves were pounded into a pulp or paste. This paste was then pressed into molds to create dense, solid cakes of various shapes and sizes.
Drying and Roasting: The cakes were then dried, often by piercing them with a hole and stringing them together to be stored or transported. Before consumption, a piece of the cake would be broken off and roasted over a fire to dry it completely and awaken its aroma.
Grinding: The roasted piece of cake tea was ground into a fine powder using a stone mill or roller.
Whisking: The powder was added to a bowl of hot water and whisked, often with ingredients like salt, ginger, or scallions, to create a frothy beverage.

This complex preparation method turned tea drinking into a deliberate, multi-step ritual, elevating it beyond a simple folk drink.

The Influence of Lu Yu’s Cha Jing (The Classic of Tea)

The culmination of this cultural evolution arrived with the publication of the Cha Jing (茶经) by Lu Yu around 760 CE. This was the world’s first monograph dedicated entirely to tea, and its impact was profound. Lu Yu’s work did not invent tea culture but systematically codified and refined it, establishing a new standard for tea appreciation.

Legitimizing Tea’s Origin: The Cha Jing definitively opens by stating, “The drinking of tea began with Shennong” (茶之为饮，发乎神农氏). By linking tea to the mythical divine farmer, Lu Yu gave it a sacred and ancient lineage, elevating its cultural status.
Standardizing Production and Preparation: Lu Yu meticulously detailed every aspect of tea, from the ideal environment for growing tea plants to the proper methods for plucking, steaming, and pressing the leaves into cakes. He advocated for a more refined preparation, moving away from the addition of strong flavorings like ginger and onion, and instead emphasizing the pure, unadulterated taste of the tea itself.
Creating a Tea Ceremony: The Cha Jing prescribed a specific set of 24 utensils necessary for the proper preparation and enjoyment of tea, from the brazier for heating water to the bamboo whisk for frothing the brew. This transformed tea drinking into a sophisticated art form with its own specialized tools and procedures, akin to a ceremony.

By synthesizing centuries of evolving practices into a single, authoritative guide, Lu Yu’s Cha Jing cemented tea’s role as a cornerstone of Chinese culture, art, and philosophy. It marked the definitive transition of tea from a regional medicinal herb to a nationally celebrated beverage of refinement and contemplation.

Conclusion

Green tea’s origins are traced to ancient China, where its discovery is enshrined in the legend of Emperor Shennong and substantiated by archaeological and textual evidence dating back over 2,400 years. The narrative of tea is a blend of myth and history, chronicling its journey from a medicinal herb to a cornerstone of global culture.Key Findings:

The discovery of tea is mythologically attributed to the Chinese Emperor Shennong, who is said to have found its properties either accidentally when leaves fell into his boiling water or as an antidote after being poisoned.
The oldest confirmed physical evidence of tea consumption is charred residue found in a royal tomb in Zoucheng, China, dating to the Warring States Period (c. 453–410 BCE).
Early texts like the Shijing and Erya refer to tea using the character “荼” (tú), centuries before the modern character “茶” (chá) was standardized during the Tang Dynasty.
The cultural practice of tea evolved from being consumed as a medicinal soup to a refined beverage made from compressed cakes, a process that was formally codified in the Tang Dynasty by Lu Yu’s Cha Jing (The Classic of Tea).

This analysis addresses the origins of green tea by examining both its foundational folk legends and the scientific evidence that confirms its ancient roots in Chinese history.