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Chinese tea
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| Traditional tea processing techniques and associated social practices in China | |
|---|---|
| Country | China |
| Reference | 1884 |
| Inscription history | |
| Inscription | 2010 (17th session) |
| List | Representative |
UNESCO Cultural Heritage | |
| Chinese tea | |||||||||||||||||||||
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Longjing tea being infused in a gaiwan | |||||||||||||||||||||
| Traditional Chinese | 茶 | ||||||||||||||||||||
| Simplified Chinese | 茶 | ||||||||||||||||||||
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Chinese teas can be classified into six distinctive categories: white, green, yellow, oolong, black and post-fermented. Others add categories for scented and compressed teas. All of these come from varieties of the Camellia sinensis plant. Most Chinese teas are cultivated and consumed in China. It is commonly available in Chinese restaurants and grocery shops worldwide. Green tea is the most common type of tea consumed in China, while black tea is the second most common.
Within these main categories of tea are vast varieties of individual beverages. Some of the variations are due to different strains of the Camellia plant. However, the largest factor in the wide variations comes from differences in tea processing after the tea leaves are harvested. White and green teas are heat-treated (杀青; 殺青; shā qīng) soon after picking to prevent oxidation. Other differences come from variations in the processing steps.
Categories
[edit]White
[edit]White tea is usually referred to as the least processed tea. It is delicate and sweet, and usually brewed into a light golden color depending on the variety. Usually, leaves wither in the open air immediately after picking and then dry to prevent any excessive oxidation. White tea is usually harvested and processed under very strict conditions, and for many people, a high shoot to leaf ratio (a large number of leaf buds rather than more mature leaves) is the preferred choice.[1]
Green
[edit]For green tea, the tea leaves are harvested from camellia plants and then quickly heated and dried through frying or steaming to prevent excessive oxidation, which can turn the green leaves brown and alter their freshly picked taste.[2]
Black
[edit]The difference between black tea and green tea is that during the production process, the tea leaves need to be completely oxidized before hot processing and drying. During the oxidation process, oxygen interacts with the cell walls of tea trees, causing the leaves to turn a rich dark brown to black color, which is famous for red tea.[3]
Oolong
[edit]Oolong tea originated in China and was actually transliterated from two words in Mandarin, meaning "black" and "dragon". In addition to their inherent meanings, these two words also describe the shape of oolong leaves in a novel state. Oolong tea undergoes a unique semi oxidation process, ranging from 1% to 99%.[4]
Yellow
[edit]The production process of yellow tea shares some similarities with green tea, except for the key point of making true yellow tea, which is oxidation before or after drying to give it a yellow appearance. Yellow tea began to be cultivated in the southeastern province of Sichuan, China around 2000 years ago. [5]
History
[edit]The practice of drinking tea has a long history in China, having originated there. Although tea originated in China, during the Tang dynasty, Chinese tea generally represents tea leaves which have been processed using methods inherited from ancient China. According to legend, tea was discovered by Chinese Emperor Shen Nong in 2737 BC when a leaf from a nearby shrub fell into water the emperor was boiling.[6][7] The emperor was very interested in this new liquid because it had a pleasant aroma, so he drank the infusion and found it very refreshing, with a pleasant taste. He claims that tea brings vitality to the body; Therefore, tea was invented, but it is considered a medicinal beverage.[8] Tea is deeply woven into the history and culture of China. The beverage is considered one of the seven necessities of Chinese life, along with firewood, rice, oil, salt, soy sauce and vinegar.[9]
Song dynasty
[edit]
Tea was an important crop during the Song dynasty. Tea farms covered 242 counties during this time. This included expensive tribute tea, which was tea from Zhejiang and Fujian provinces that was exported to Southeast Asian and Arab countries.
In the Song dynasty, tea started to be pressed into tea cakes (usually black tea). Some were embossed with patterns of the Chinese dragon and the Phoenix, and were called exotic names including:
Large Dragon tea cake, Small Dragon tea cake, Surpassing Snow Dragon ball cake, Fine Silver Sprout, Cloud Leaf, Gold Money, Jade Flower, Inch of Gold, Longevity Sprout, Eternal Spring Jade Leaf, Dragon in the Clouds, Longevity Dragon Sprout, Dragon Phoenix and Flower, and Eternal Spring Silver Sprout.
Ming dynasty
[edit]The Ming dynasty scholar Wen Zhenheng's encyclopedic book Zhǎng Wù Zhì (simplified Chinese: 长物志; traditional Chinese: 長物志; Treatise on Superfluous Things), volume 12, contains the descriptions of several famous Ming dynasty teas.

During Ming, tea was a form of currency also used to pay imperials tribute. Ming dynasty founder Zhu Yuanzhang (also known as the Hongwu emperor) was born to a poor family and understood the difficulties of the lives of farmers. He abolished the compressed tea brick style and replaced it with the whole, loose-leaf tea style, and also declared people instead pay tribute with tea buds.[10] This amendment especially helped relieve tea farmers of some of the pressures of the laborious and complicated tea production processes.[11] These complex processes for farmers included: steaming tea leaves, breaking them down into fine remnants, mixing the powder with plum juice, then baking them with molds to shape into tea bricks.[12]
Culture
[edit]
Customs and etiquette
[edit]In some places of China, in restaurants, it is common for customers to clean their bowls and utensils at the table by rinsing them with tea from the pot. Tea may be poured over utensils into one of their bowls, or a larger bowl is may be provided as a waste receptacle for tea used to rinse bowls. In restaurants in China, tea is usually served in lieu of water, and hence tends to be a light drink flavoured.[13]
However, when sipped as a daily beverage, Chinese people tend to use a special personal tea bottle, in which water is allowed to infuse with tea leaves for hours, and sipped continuously. This method, which is more prevalent in day-to-day Chinese life, involves the repeated use of the same tea leaves throughout the day.[13]
Utensils
[edit]
A traditional Chinese tea set consists of special clay or porcelain teapots, teacups, tea spoons, tea strainers, draining trays, tea forceps (for the leaves), a large forceps (for the tea cups) and occasionally, tea caddies. All of these are kept on a special wooden tea tray with an inbuilt draining arrangement and a holder for the drained water. however, in more modern times, specially built electric hotplates for tea sets are used by some Chinese people.[13]
Tea houses
[edit]Chinese tea houses refer to the public place where people gathered to drink tea and spend their spare time. Chinese tea houses have a long history. It first took shape during the Tang dynasty Kaiyuan era (713–714)[14] and became common during the Song dynasty. From the Ming and Qing dynasties, tea house culture became integral to regional culture.[15]
Drinking morning tea is a custom within various provinces regardless of what status or identity people are. People often go to tea house in twos to threes to relax, be entertained, and gather information all while sipping tea. One could find old folks reminiscing over their joys and sorrows, or youth discussing their ambitions.[16]
In 1970s, Chinese tea houses spread to Hong Kong. Some notable ones include “Yen Yen”, “Tsui Heung Yuen”, “Pak Cheuk”, “Yin Bun Lau”, and “Wun Tin”, among others. Merchants would use tea houses as a place for exchanging information and business. For example, a jade merchant might complete a transaction in a tea house.[17]
A tea garden is a tea house which features a Chinese garden or a domestic Chinese garden in which people enjoy their tea.
Chinese tea houses are one of the few traditional social institutions, and their broader social and cultural appeal outweighs their main business. From a historical perspective, it has been closely linked to the living structure of the Chinese people.[18]
Ba-Shu culture and Sichuan teahouses
[edit]Sichuan teahouses have various sizes. The large ones have hundreds of seats, while the small ones, only a few. They also have excellent services. Traditional Sichuan teahouses use red copper teapots, tin saucers, teacups with covers made of Jingdezhen porcelain, tuocha- a bowl-shaped compressed tea leaves- and tearoom keepers expert at all manner of work. What's more, Sichuan teahouses have social functions. They play an important role in spreading the state affairs information. People can chat with each other there. They also serve as unofficial courts.[19]
Wu-Yue culture and Hangzhou teahouses
[edit]Wu-Yue area is famous for tea producing and green tea produced in Zhejiang province play a decisive role. In Hangzhou, most tearooms are elegant, simple and unsophisticated. They emphasize making tea with good-quality water and tasting tea in an excellent environment in order to achieve the true meaning of tea art.[20]

Tianjin teahouses, Shanghai Fuchaguan teahouses and Guangdong tearooms
[edit]Most of the Tianjin teahouses meet the needs of business people from different parts of China. People of various trades drink tea while eating refreshments and appreciating performances which include singing of opera arias, storytelling and dagu (a versified story sung to the accompaniment of a small drum and other instruments).
In the past, Shanghai teahouses are regarded as learned and refined places in Shanghai. Shanghai people called teahouses fuchaguan to express their longing for leisure. The most typical teahouse with local features was situated in the old Chenghuangmiao area.
The old Guangdong tearooms were inexpensive. Regular customers would be served with a cup of tea, and two steamed buns stuffed with diced grilled pork, steamed dumplings with the dough gathered at the top, or dumplings with shrimp stuffing. However, teahouses become different now. Nowadays, customers are provided with a pot of strong tea as soon as they arrive, and have many choices from a great variety of refreshments on the food cart.[21]

Beijing teahouse culture
[edit]Beijing teahouses show most of the advantages of other local teahouses. They are known for their various functions, and rich and profound cultural aims.
There are many kinds of Beijing teahouses, which include Shuchaguan, Qingchaguan, Qichaguan, Yechaguan, Dachaguan, and Erhunpu.[22]
Specific tea house types
[edit]Teahouse culture made a special contribution to the development of the novel, and shuchaguan was the best evidence to explain. At shuchaguan, tea is only acted as a medium and supplement because people came mainly to listen to storytelling. Storytelling was performed two times a day and a long story would last two or three months. Famous shuchaguan were exquisitely furnished with cane or wooden tables and chairs, and decorated with works of calligraphy and painting in order to build an atmosphere for storytelling. The purpose of drinking tea in shuchaguan is increasing their historical knowledge, killing time and amusing themselves. So shuchaguan were best suited to old people.[23]
Qingchaguan provides places for people from all walks of life to entertain themselves elegantly. In the past, most of the Qingchaguan were simply furnished with square tables and wooden chairs. Teacups with covers were used to serve tea. However, tea was served without refreshment in Qingchaguan.[24]
Qichaguan provides places for customers to play chess. Qichaguan were simply furnished with timber or lumps of wood painted with chess boards, which were partly buried in the ground, or chessboards with benches on both sides. When people played chess while drinking tea, they will feel that the chessboards was like a battlefield of life. Usually they would temporarily forget about their sufferings, and that's why tea was also called wangyoujun (Mr. Worry-free).[25]
People went to Yechaguan to appreciate beautiful gardens. People of Beijing in old times were keen on enjoying beautiful scenes in different seasons. So yechaguan were mostly built in those places with beautiful gardens and nice views.[26]

Dachaguan provided tea, food and services to people in various trades such as business men and scholars. In terms of service, it includes Hongluguan, Wowoguan and Banhuguan.[27]
Hongluguan were installed with red stoves which baked Manchurian and Chinese pastries. They served all kinds of pastries, which were smaller and more exquisite than those made by pastry shops. Customers could drink tea while sampling these pastries.[27]
Wowoguan served various refreshment, including aiwowo, steamed sponge cakes, paicha, pengao and sesame seed cakes.[28]
Characterized by a large copper pot, banhuguan suited varied tastes.[28]
Erhunpu served tea without refreshments but provided dining and wining facilities. It supplied customers with food cooked from in-house ingredients or ingredients brought by customers.[28]
Literature
[edit]Literature about tea during the Ming dynasty largely focused on tea pickers, with writings and artwork regarding aspects such as tea picking and processing.
Tea-picking Poem - Gao Qi[29]
It is getting warm after the spring rain and thunder,
New tea leaves start sprouting among branches.
Girls with silver hairpins sing folk songs to each other,
Competing to pick the most tea leaves in the shortest time.
They get home with the fresh scent of tea leaves on their hands,
The highest qualities will be sent to the Prefecture first.
The newly baked tea leaves are not tasted yet,
They are packed into baskets and will be sold to Hunan merchants.
Satirical poems and songs were also created and reflected struggles of tea farmers and ridiculed greedy officials.[30] After Mid Ming, the amount of tribute tea soared due to an increased pressure upon citizens by higher bureaucrats. Officials demanded higher taxation and escalation of the requirement of tribute tea.[30] Some citizens began to grow angry with these demands, including poets Gao Qi and Han Bangqi.[30] Although their main occupations were government officials, they were also generally acknowledged writers who voiced their complaints through poems that became widespread folk ballads. Through their writings they requested the reduction of taxation and tributes. However, Gao was accused by the government of "involvement in a rebellion conspiracy”[31] and was executed, while Han was imprisoned by officials wanting to hide their written works.[30]
Fuyang Ballad - Han Bangqi[32]
Tea-picking women and fish-catching men
Feudal officials torture them so they don't even have unscathed skin
How come the Heaven is not humane?
Have people here done anything wrong?
Symbolism and significance
[edit]The China famous tea (Chinese: 中国名茶; pinyin: zhōng guó míng chá) or The Ten Great Chinese Teas (Chinese: 中国十大名茶; pinyin: zhōng guó shí dà míng chá) are the ten most notable Chinese teas. Below is a list of ten common teas in China.[33]
| Chinese | English | Region | Type |
|---|---|---|---|
| 西湖龙井 | Longjing tea (also spelled Lungching; 'Dragonwell') | Hangzhou, Zhejiang | Green tea |
| 洞庭碧螺春 | Biluochun tea (also spelled Pi lou chun, 'Green snail spring') | Suzhou, Jiangsu | Green tea |
| 安溪铁观音 | Anxi Tieguanyin tea | Anxi, Quanzhou, Fujian | Oolong tea |
| 黄山毛峰 | Huangshan Maofeng tea | Huangshan, Anhui | Green tea |
| 武夷岩茶-大红袍 | Wuyi tea, e.g., Da hong pao ('Big red robe') | Wuyi Mountains, Fujian | Oolong tea |
| 君山银针 | Junshan Yinzhen ('Jun Mountain silver needle') | Yueyang, Hunan | Yellow tea |
| 祁门红茶 | Keemun Black tea | Qimen, Huangshan, Anhui | Black tea |
| 六安瓜片 | Lu'an Melon Seed tea | Jinzhai, Lu'an, Anhui | Green tea |
| 云南普洱 | Yunnan Pu'er | Pu'er City, Yunnan | Post-fermented tea or "dark" tea |
| 白毫银针 | Baihao Yinzhen ('White tip silver needle') | Fuding, Ningde, Fujian | White tea |
Production
[edit]

The highest grades of white tea, yellow tea, and green tea are made from tender tea shoots picked early spring. These young tea shoots may consist of a single terminal bud, a bud with an adjacent leaf or a bud with two adjacent slightly unfurled leaves. It is generally required that the leaves are equal in length or shorter than the buds.
The more-oxidized tea—such as red or oolong tea—are made from more mature leaves. For example, the Anxi Tieguanyin (grown in the tea region of Anxi in Fujian), is made from one bud with two to four leaves.
Not all high grade green tea is made from tender tea shoots. The highly regarded green tea Lu An Gua Pian is made from more matured leaves.
Traditionally these tender tea shoots are picked before 5 April, or Qingming Festival.[clarification needed] The standard practice is to start picking when 5% of the garden is ready, or when the tea buds reach certain size. In some tea gardens, tea shoots are picked daily, or every 2 days.[34]
Ming dynasty
[edit]Tea farmers
[edit]Tea households were normally small, family-based operations for tea cultivation.[35] There were also tea merchants who set up tea firms to create their own tea plantations and/or to process tea leaves after buying from local tea farming families.[35] Different from tea households, seasonal workers were often employed by tea firms. Seeking work during the harvesting seasons, they often took boats to Tunxi, Anhui and other places where tea leaves were abundant.[35]
Tea production process
[edit]Harvesting tea was heavily dependent on weather conditions, so tea could not usually be produced throughout the entire year. Various weather conditions throughout different areas limited tea to be grown in a few specific regions: Jiangnan, Jiangbei, Hunan and Xinan.[36] These areas provided stable warm weather and rainfall- two essential components of growing tea plants. The general production of loose, whole-leaf teas mainly included: tea seedling plantation, fertilization/weeding/spraying, tea picking, sunning/firing/rolling, and sorting and packaging.
Tea picking
[edit]Tea picking was a central component of the entire tea production process. Time spent working and the intensity of labor fluctuated due to the inability to accurately predict weather conditions. This created uncertainties regarding ideal tea picking times. However, generally “the ideal time for picking tea leaves was early morning before sunrise.”[37] Tea pickers would usually leave their homes early and do work using careful techniques efficiently to ensure the leaves were gently picked in whole.[38] To do so, pickers used one or both hands to nip the green stems with their index fingers and thumbs, then held the leaves until they had palms-full before tossing the leaves into their baskets.[38] Women were preferred for this occupation because of their ability to more gently and carefully pick off the whole tea leaves.[39] No matter the age or marital status, women were expected to be capable of performing this duty.[35] However, there were also limitations on women during this time. According to Luo Lin's Explanation of Tea, women were not allowed to participate in any aspect of tea making during their menstrual periods.[40] They were to avoid “female pollution” from their “unclean” bodies.[35]
Sunning, firing and rolling
[edit]After picking tea leaves, families first sorted out the damaged or rotten leaves then began the sunning process.[35][41] In the first stage, reduce its water content to about 60% -70%. This is achieved by placing tea leaves in large grooves on metal wire mesh. Then air passes through them, gently drying them out. This takes 12–17 hours to bend the leaves and prepare to roll them up.[42] This process inhibited water evaporation within tea leaves to promote oxidation.[43] Over-oxidation can alter the taste of the tea to become "grass-like" or thick and bitter,[44] so farmers heated the leaves to stop the oxidation once the desired level was reached- a process known as 'firing'. Then, leaf cells were broken down by gently rubbing the tea leaves- this process helped volatilize the scents and tastes when brewing. Tea leaves were damped then rolled into shapes, making its storage convenient[45] while also allowing sap to squeeze out and provide additional flavoring.[46]
Sorting and packaging
[edit]Once the leaves were dried again, they were sorted and packaged and sold. Tea was usually "transported by a train of porters who used carrying poles to transport multiple chests of tea to the shippers",[47] as the tea was largely sold to merchants and also largely produced to be exported.
Trade
[edit]When tea gradually became more common in England in the 18th century, most British people tended to purchase tea grown in the Yangtze River Delta and Fujian region.[48] China has experienced declining trends in tea export growth rate since the mid-1990s. Compare to 1980s that the export volume is decreased 232 tons to 170 tons, is around 26.7%, because the coverage of tea safety standards and Maximum Residual Limit of pesticides negatively affected China's exports.[49]
The increase in export of green tea from China has not been commensurate with production. During 2010, China exported 234 M kg of green tea as against 163 metric kg in 2001. Its share of export in the global market has been found to fall from 87% to 78% between 2003 and 2007. However, in 2010, China contributed 79% of the total green tea exported worldwide.
Varieties
[edit]
Spelling of varieties often reflects English usage, and historical or southern-Chinese pronunciation rather than official modern pinyin, for example; Bohea (武夷茶 wǔyí chá), Congou (工夫 gōngfu), Hyson (熙春茶 xīchūn chá), Souchong (拉普山小種 lāpǔshān xiǎozhǒng), Chunmee (珍眉 zhēnméi), Sowmee (秀眉 xiùméi), Pekoe (白毫 báiháo), Keemun (祁門紅茶 qímén hóngchá).[50]

See also
[edit]- All In This Tea, a 2007 documentary
- List of Chinese teas
- Taiwanese tea
References
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- ^ Po, Ronald C. (2018-04-26), "Tea, Porcelain, and Silk: Chinese Exports to the West in the Early Modern Period", Oxford Research Encyclopedia of Asian History, doi:10.1093/acrefore/9780190277727.013.156, ISBN 978-0-19-027772-7, retrieved 2024-03-28
- ^ Wei, Guoxue; Huang, Jikun; Yang, Jun (2012). "The impacts of food safety standards on China's tea exports". China Economic Review. 23 (2): 253–264. doi:10.1016/j.chieco.2011.11.002. ISSN 1043-951X.
- ^ Kit Boey Chow, Ione Kramer All Teas in China Page 179 1990 "for promotion purposes, many non-Chinese companies borrow names from Chinese teas, such as Bohea, Congou, Hyson, Souchong, Chunmee, Sowmee, Pekoe, Keemun, etc. Such labels may contain little or no tea of ..."
Further reading
[edit]- Evans, John C., Tea in China: The History of China's National Drink. Contributions to the Study of World History, Number 33. Greenwood Press: New York; Westport, Connecticut; London, 1992. ISSN 0885-9159, ISBN 0-313-28049-5
- Forbes, Andrew ; Bently, David (2011). China's Ancient Tea Horse Road. Chiang Mai: Cognoscenti Books. ASIN: B005DQV7Q2
External links
[edit]
Media related to Tea of China at Wikimedia Commons
Chinese tea
View on GrokipediaChinese tea comprises the processed leaves of Camellia sinensis, a plant native to southwestern China, yielding six primary categories—green, white, yellow, oolong, black, and post-fermented (such as pu-erh)—distinguished by varying degrees of oxidation, fermentation, and additional techniques like steaming or piling.[1][2][3]
Archaeological evidence from Han Dynasty tombs confirms tea consumption in China over 2,100 years ago, with genetic and phytolith analyses tracing domestication and wild harvesting to the Yangtze River region and Yunnan Province as early as several millennia BCE.[4][5]
Central to Chinese culture since the Tang Dynasty, tea fosters social harmony, philosophical contemplation, and ritual practices like gongfu brewing, evolving from an elite medicinal brew to a daily staple that underpins economic production as the world's largest tea exporter.[6][7]
History
Origins and Early Development
Tea originated from wild populations of Camellia sinensis in southwest China, particularly Yunnan province, where genetic analyses of over 1,300 accessions indicate this region as the primary center of domestication, with var. assamica showing close ties to ancient wild relatives through nuclear microsatellites and chloroplast DNA sequences.[8][1] Archaeological evidence of tea consumption dates to the early Warring States period (circa 453–410 BCE), with charred leaf remains identified via microscopy and chemical analysis in a tomb bowl from Zoucheng, Shandong province, marking the oldest verified instance of prepared tea.[9] These findings suggest initial human utilization involved boiling wild or semi-domesticated leaves, likely as a medicinal decoction rather than a standalone beverage, driven by the plant's natural caffeine content for stimulation and its evergreen availability in forested highlands.[10] By the Western Han dynasty (circa 100 BCE), tea had transitioned toward elite consumption, as evidenced by desiccated leaf residues in Emperor Jing's mausoleum near Xi'an, dated to approximately 2100 years before present, which chemical profiling confirmed as C. sinensis buds transported from southern regions.[4] This diffusion along proto-Silk Road branches facilitated wider adoption, with texts like the Erya (3rd century BCE–2nd century CE) referencing "tu" (a term for tea) in medicinal contexts, reflecting causal shifts from foraging wild varieties for detoxification to systematic gathering amid growing trade in stimulants and preservatives.[4] Early preparation favored loose-leaf boiling over later compressed bricks, as tomb artifacts lack evidence of pressing techniques until subsequent eras, aligning with practical needs for herbal infusions in nomadic and imperial settings.[4] The Shennong Bencao Jing, compiled during the Eastern Han dynasty (25–220 CE) but drawing on earlier oral traditions, categorizes tea as a mild toxin counteragent among 365 medicinals, underscoring its role in empirical pharmacology before recreational infusion.[11] This textual record, while legendary in attribution to the mythical Shennong, preserves verifiable Han-era practices where tea's alkaloids addressed digestive and alertness needs, predating its Song dynasty commodification.[12] Domestication progressed gradually from wild var. assamica in Yunnan tropics to selective propagation, with genetic bottlenecks evident in reduced diversity of cultivated lines compared to feral populations, indicating human-driven adaptation for yield over millennia.[1]Tang and Song Dynasties
During the Tang dynasty (618–907 CE), tea transitioned from a medicinal herb to a staple beverage among elites, with cultivation intensifying in southern provinces like Sichuan, Hunan, and Anhui. By 862 CE, approximately 70–80% of residents in Qimen County, Anhui, depended on tea farming for livelihood, reflecting its economic integration into agrarian society.[13] Lu Yu's Cha Jing (The Classic of Tea), completed around 760 CE, codified empirical practices, outlining ten chapters on tea's origins, tools (e.g., kettles, bowls), leaf selection, steaming and rolling processes to preserve freshness, and brewing with spring water at controlled temperatures to avoid bitterness.[14][15] This standardization elevated tea's cultural status, linking it to Daoist harmony and health benefits like aiding digestion. Buddhist institutions drove tea's ritual adoption, with monasteries in misty highlands cultivating plants suited to shaded, humid conditions and using infusions to combat drowsiness during extended meditation, supplanting alcohol in communal gatherings.[16][17] Monks' practices, documented in temple records, emphasized tea's clarity-promoting effects, fostering exchanges between clergy and scholars outside courtly wine traditions.[18] The Song dynasty (960–1279 CE) refined preparation via dian cha (whisked tea), grinding compressed cakes into fine powder, sifting impurities, boiling with salt, then frothing via rapid whisking with bamboo whisks to form layered crema—prized for visual purity over Tang infusions.[19][20] This method fueled dou cha contests, where participants vied on froth durability, hue (ideally pale green), and aroma, often among literati in teahouses.[21] Economically, tribute systems supplied the court with over 40 premium varieties from regions like Fujian and Zhejiang, while the tea-horse trade exported 2,600–3,000 tons annually from Sichuan and Shaanxi frontiers, procuring around 10,000 cavalry horses yearly from Tibetan and Central Asian polities to bolster military capacity. Tea's monastic role persisted in Chan lineages, integral to zazen sessions for sustained wakefulness.[22]Ming and Qing Dynasties
During the Ming dynasty (1368–1644 CE), Emperor Hongwu issued an edict in 1391 prohibiting the production of compressed tea cakes for imperial tribute and requiring loose-leaf tea instead, citing widespread corruption, bribery, and excessive labor in the cake-making process that diverted resources from agricultural productivity.[23] This decree aligned with evolving preparation methods, as whole-leaf steeping had already become common outside official channels, enabling more efficient harvesting and processing that boosted yields by simplifying production from labor-intensive compression to direct leaf drying and firing.[24] The shift entrenched loose-leaf dominance, reducing dependency on specialized molding techniques and facilitating wider domestic consumption through infusion rather than boiling bricks. In the subsequent Qing dynasty (1644–1912 CE), tea production scaled under state-controlled tribute systems, with Pu'er tea from Yunnan emerging as a prized offering; by the Yongzheng era (1722–1735 CE), it was formalized as imperial tribute, sourced primarily from ancient trees in regions like Yiwu.[25] Yiwu, in Xishuangbanna, functioned as a central hub for Pu'er processing and trade along the Tea Horse Road, where raw leaves from surrounding mountains were steamed, pressed into cakes, and dispatched to Tibet and the court, underscoring the system's role in integrating frontier economies with central authority.[26] Qing trade policies emphasized monopolies like the quecha (tea administration), under which farmers surrendered harvests to officials for tax deduction—often 10% withheld—before the remainder was auctioned to licensed merchants, channeling revenues while restricting free-market flows.[27] Concurrently, European demand surged for oxidized teas such as black varieties, driving exports that reversed trade imbalances; from the early 18th century, shipments to Britain and the Netherlands yielded net silver inflows estimated at over 16 million taels annually by mid-century, funding China's currency needs amid domestic silver shortages.[28] These controls, while stabilizing tribute quotas, imposed bureaucratic layers that historical fiscal analyses link to subdued private innovation in processing and distribution, as merchants navigated quotas over experimentation.[29]20th and 21st Centuries
During the Republican era (1912–1949), Chinese tea production underwent attempts at commercialization amid political fragmentation, with reformers advocating for improved processing and export infrastructure to compete globally, though warlord conflicts and economic instability constrained output growth. The Japanese occupation from 1937 onward further disrupted cultivation in key provinces like Fujian and Anhui, halting artisanal plucking and factory operations in occupied zones, which contributed to a sharp decline in high-grade exports as global demand shifted to alternatives from India and Ceylon.[30] Following the establishment of the People's Republic in 1949, collectivization organized tea farmers into production teams and communes, emphasizing mass output for state procurement over traditional quality-focused methods, which eroded artisanal expertise and led to standardized, lower-grade teas dominating supply.[31] This shift prioritized quantity to meet export quotas and domestic needs, but incentive structures under collectives stifled innovation, resulting in stagnant per-hectare yields and a focus on bulk green and black teas at the expense of premium varieties.[32] By the late 1970s, tea quality had noticeably declined due to uniform processing and reduced smallholder autonomy.[33] The 1978 rural reforms, introducing the household responsibility system, devolved land use rights to families and raised procurement prices for cash crops like tea, spurring private cultivation and output expansion as farmers shifted from staples to higher-value teas.[34] This decollectivization boosted tea acreage and productivity, with national production rising from approximately 400,000 tons in 1978 to over 1 million tons by the 1990s, enabling diversification into oolongs and pu-erh while restoring incentives for quality plucking.[35] In the 21st century, China's tea sector integrated e-commerce, with online sales surging to 27.98 billion yuan in 2020—nearly double 2019 levels—facilitating direct-to-consumer premium varieties via platforms like Taobao and cross-border sites.[36] The "new tea drinks" segment, featuring ready-to-drink and milk tea innovations, expanded rapidly, with market projections reaching 374.93 billion yuan by 2025 amid urbanization and youth preferences for flavored beverages.[37] However, export challenges emerged, including a 17.5% decline in black tea shipments through October 2024 due to oversupply and competition, alongside domestic price collapses—such as an 80% drop in pu-erh values—triggering widespread farm and shop closures in 2025 as investor speculation unwound amid economic slowdowns.[38][39][40]Classification
The Six Major Categories
Chinese teas are systematically classified into six major categories according to the extent of post-harvest oxidation and fermentation processes applied to the leaves of Camellia sinensis, reflecting empirical differences in enzymatic reactions, heat application, and microbial activity that alter the leaf's chemical composition, particularly polyphenols and caffeine content.[41][42] This framework prioritizes processing science over subjective taste profiles, with oxidation levels ranging from 0% (complete inhibition) to full enzymatic browning, followed by optional post-oxidation fermentation in one category. All categories originate from C. sinensis, predominantly the var. sinensis subspecies, which features smaller, more resilient leaves adapted to cooler, higher-altitude regions of eastern and central China, enabling diverse processing outcomes through controlled environmental manipulations like steaming, pan-firing, rolling, and piling.[43] In contrast, var. assamica, with larger leaves suited to warmer, lowland tropics, appears in some southwestern dark teas but is less prevalent in traditional classifications due to its later integration into Chinese production.[44] The categories are distinguished by precise control over oxidation: green teas undergo immediate heat fixation to halt enzyme activity at 0% oxidation, preserving fresh, vegetal compounds; white teas receive minimal handling for 5-20% natural oxidation, emphasizing bud integrity; yellow teas involve a smothering step post-fixation for light, anaerobic fermentation akin to 10-20% effective oxidation, yielding subdued flavors; oolong teas are partially oxidized (typically 8-85%) through withering and bruising to initiate controlled enzymatic changes; black teas (termed hong cha or red tea in China) achieve near-complete 80-100% oxidation via rolling and air exposure, developing robust thearubigins; and dark teas undergo microbial post-fermentation after initial steaming or oxidation, simulating aged transformation through bacterial and fungal activity over weeks or years.[41][42][45]| Category | Oxidation/Fermentation Level | Key Processing Traits |
|---|---|---|
| Green | 0% (unoxidized) | Heat fixation (steaming or pan-firing) immediately after harvest to deactivate enzymes.[41] |
| White | Minimal (5-20%) | Natural withering without rolling; no fixation, allowing slight surface oxidation.[42] |
| Yellow | Light fermentation (10-20% equivalent) | Fixation followed by "yellowing" in damp, low-oxygen conditions.[41] |
| Oolong | Partial (8-85%) | Withering, bruising/rolling to initiate oxidation, then halted by firing.[45] |
| Black (hong cha) | Full (80-100%) | Extended withering, rolling to rupture cells, and aeration for complete enzymatic browning.[42] |
| Dark | Post-fermentation (microbial) | Steaming or partial oxidation followed by wet-piling for bacterial breakdown.[41] |
Processing Methods and Oxidation Levels
The primary steps in Chinese tea processing—plucking, withering, fixation, rolling, and drying—fundamentally control oxidation levels by modulating the activity of polyphenol oxidase (PPO), the key enzyme catalyzing the conversion of catechins to oxidized compounds like theaflavins and thearubigins.[46] Plucking selects tender shoots rich in polyphenols (up to 30% dry weight in young leaves) and latent PPO, setting the substrate for potential enzymatic reactions upon cell disruption.[47] Withering, often conducted at 20-30°C with 80-90% humidity for 4-18 hours depending on tea type, softens tissues and initiates mild oxidation by exposing substrates to air and enzymes, reducing moisture by 20-30% while concentrating flavors through evapotranspiration.[48] This step's duration and conditions directly influence oxidation extent, as prolonged exposure elevates PPO-substrate interactions without full denaturation.[49] Fixation, known as sha qing or kill-green, halts oxidation by rapidly heating leaves to 200-300°C via pan-firing or steaming, denaturing PPO and peroxidase within 1-5 minutes to preserve green character in non-oxidized teas.[50] In partially or fully oxidized teas, fixation is delayed or minimized, allowing controlled PPO activity; rolling then bruises cells to release vacuolar enzymes into cytoplasmic polyphenols, accelerating oxidation under humid, temperate conditions (25-35°C, >90% relative humidity) for 30 minutes to several hours.[51] Final drying or firing at 80-120°C completes enzyme inactivation, stabilizes compounds, and develops aroma volatiles via Maillard reactions, yielding oxidation levels from near-zero (greens) to full (blacks, >80% catechins oxidized).[52] Biochemically, PPO (optimal pH 5-7) oxidizes (-)-epigallocatechin gallate to ortho-quinones, dimerizing into theaflavins (bright red, brisk flavor) before polymerizing to thearubigins (dark, malty notes), with peroxidase aiding under oxygen-rich conditions.[46] Oxidation is empirically managed through PPO kinetics: activity surges post-rolling due to compartmentalization breakdown, but excess (e.g., >40°C uncontrolled) yields bitter thearubigins prematurely, while insufficient exposure retains grassy catechins; PPO in Chinese cultivars inactivates 77% at 70°C within 5 minutes, necessitating precise heat gradients to avoid quality degradation.[53] Improper handling, such as delayed fixation, can diminish theaflavin yields by 20-50% via over-polymerization, underscoring temperature-humidity precision for biochemical fidelity.[54] Chinese methods prioritize finesse for Camellia sinensis var. sinensis—smaller leaves from temperate, high-altitude terroirs enabling subtle oxidation control via hand-rolling and variable withering—contrasting Indian orthodox processes for var. assamica, which employ heavier crushing and extended withering (12-24 hours) suited to robust, subtropical leaves yielding higher catechins (up to 40% dry weight) and bolder, uniform oxidation for broken grades.[55] This varietal-terroir divergence causally stems from sinensis' slower growth in China's diverse microclimates (e.g., foggy hills fostering nuanced enzyme profiles) versus assamica's vigorous output in Assam's humidity, dictating lighter manipulation to preserve delicate volatiles over mass yield.[54]Varieties
Green Teas
Green teas, known as lǜchá in Chinese, are unoxidized products made by rapidly heating freshly plucked leaves to deactivate polyphenol oxidase enzymes, thereby halting oxidation and preserving the natural green color, high catechin levels, and fresh character of the leaves.[56] This process retains elevated concentrations of catechins such as epigallocatechin gallate (EGCG), which contribute to the tea's antioxidant capacity, with levels typically higher in green teas than in oxidized varieties due to minimal enzymatic breakdown.[57] In China, pan-firing in heated woks is the predominant method, imparting nutty, roasted undertones and a smoother mouthfeel compared to steaming, which yields crisper, more vegetal profiles but is rarer in Chinese production.[58][57] Prominent varieties include Longjing (Dragon Well) from Zhejiang Province's West Lake region, Biluochun from Jiangsu's Dongting Mountains, and Xinyang Maojian from Henan.[59] Longjing, one of the most revered, features flat, sword-shaped leaves pan-fired to achieve a chestnut-like aroma and subtle sweetness; its premium pre-Qingming harvest, occurring before April 5, involves hand-plucking tender buds during cooler spring conditions to maximize freshness and yield limited quantities prized for historical imperial tribute rituals dating back centuries.[60][61] Biluochun, with its spiraled, fuzzy leaves, offers floral and fruity notes from early spring plucking, while Maojian's needle-like tips deliver a brisk, refreshing taste.[62] Major cultivation centers Zhejiang and Anhui account for substantial shares of output, with China's total green tea production reaching approximately 1.91 million metric tons in 2023, comprising 57.9% of national tea volume.[63][64] Sensory profiles of Chinese green teas emphasize vegetal, grassy aromas and fresh, astringent tastes with umami undertones, derived from preserved amino acids and volatiles unaltered by oxidation.[65] These teas exhibit sensitivity to storage conditions, as exposure to humidity, light, or temperatures above 25°C accelerates degradation of catechins and aroma compounds, diminishing freshness within months; optimal preservation occurs at -20°C or below to maintain emerald hues, tender scents, and vibrant infusions.[66][67] Pan-firing's thermal effects further influence longevity, reducing initial catechin content slightly relative to steaming but enhancing flavor stability through Maillard reactions that develop complex roasted notes.[68]White Teas
White teas, primarily produced in Fujian province, particularly Fuding county, undergo minimal processing that emphasizes natural withering and drying to preserve the delicate characteristics of young tea buds.[69] This approach results in teas with subtle, fresh flavors derived from solar withering, which gently reduces moisture content over hours or days without mechanical intervention, allowing enzymatic changes to develop nuanced taste profiles low in bitterness.[70] The absence of rolling or fixation prevents significant oxidation, maintaining high levels of natural compounds like amino acids, including theanine, which contribute to the tea's mellow, sweet undertones.[71] Prominent varieties include Bai Hao Yin Zhen, known as Silver Needle, plucked exclusively from unopened buds for its silvery appearance and refined delicacy, and Pai Mu Tan, or White Peony, which incorporates one or two tender leaves with buds for a fuller body.[72] Buds-only plucking, typically from specific cultivars like Fuding Da Bai, ensures premium quality but limits yield to early spring harvests.[73] Processing entails spreading leaves in sunlight or shaded areas for withering—often 24-48 hours—followed by low-temperature drying, yielding a product with intact leaf integrity and minimal alteration.[74] Empirical analyses indicate white teas generally exhibit lower caffeine content compared to green teas, alongside elevated antioxidant activity, as measured by radical scavenging assays where white tea extracts outperformed others in polyphenol preservation due to reduced processing heat.[75] [76] Studies on Fuding white teas confirm higher theanine and free amino acid levels, correlating with smoother infusions, though caffeine varies by bud maturity.[71] However, mass-produced variants often show quality inconsistencies, with inferior withering leading to uneven flavor and reduced compound retention compared to artisanal methods.[77] White teas demonstrate empirical aging potential, with storage over years altering metabolites to enhance certain sensory qualities, as observed in longitudinal studies of samples aged 1-7 years showing progressive flavor maturation without spoilage under controlled conditions.[78] This transformation, driven by slow microbial and chemical interactions, underscores their suitability for long-term holding, though outcomes depend on initial quality and environmental factors like humidity below 60%.[79]Yellow Teas
Yellow tea represents one of the rarest categories among Chinese teas, distinguished by its light fermentation through a specialized "mèn huáng" (smothering or yellowing) process that permits controlled enzymatic oxidation after initial heat fixation, unlike green teas which halt oxidation entirely.[80][81] This step involves heaping the fixed leaves in a damp, enclosed environment at moderate temperatures (around 50-60°C) for several hours, promoting the breakdown of chlorophyll into pheophytin and partial conversion of catechins, which biochemically mellows the tea's profile and imparts subtle hay-like or stewed notes from volatile compounds formed during non-enzymatic browning and lipid oxidation.[82][83] The result is a tea with yellow leaves and liquor, lower astringency than greens, and a smoother mouthfeel due to reduced polyphenol oxidase activity under anaerobic conditions.[84] Key varieties include Junshan Yinzhen, produced solely from plump buds on Hunan Province's Junshan Island, and Mengding Ganlu (also known as Mengding Huangya), derived from similar bud sets in Sichuan's Mengding Mountains.[85] Production is confined to these high-altitude regions with specific microclimates, yielding teas prized for their rarity; yellow teas account for less than 1% of China's annual tea output, limited by the technique's demands for manual heaping and precise humidity control to avoid spoilage.[86][87] Yellow tea's scarcity intensified post-1949 with the decline of artisanal methods amid collectivization, leading to near-disappearance by the mid-20th century before targeted revivals in the late 20th century restored small-scale output, though volumes remain marginal compared to dominant categories like green and black teas.[85][88] The process's empirical challenges—requiring empirical timing to balance oxidation without bitterness—further constrain scalability, preserving yellow tea as a niche product tied to traditional expertise rather than mass production.[89][90]Oolong Teas
Oolong teas are partially oxidized varieties of Camellia sinensis originating primarily from Fujian Province in China, with significant production also in Taiwan, featuring oxidation levels typically ranging from 10% to 70%, which positions them between unoxidized green teas and fully oxidized black teas.[91][92] This partial oxidation, controlled through techniques like shaking and bruising the leaves to initiate enzymatic reactions, results in complex flavor profiles encompassing floral, fruity, roasted, and mineral notes, influenced by the degree of oxidation and subsequent processing steps such as rolling and firing.[93][94] Prominent varieties include Tieguanyin from Anxi County in Fujian, a lightly oxidized oolong (around 10-25%) known for its floral and orchid-like aromas, achieved through ball-rolling techniques that compress leaves into tight spheres, promoting gradual aroma release during multiple infusions.[94][95] Originating in the 19th century, Tieguanyin production involves harvesting young buds and leaves, followed by withering, shaking to bruise edges, and repeated rolling—often 10-50 cycles—to form dense balls before final drying and firing.[96][97] In contrast, Wuyi rock oolongs like Da Hong Pao, grown on mineral-rich granite soils in the Wuyi Mountains, undergo higher oxidation (up to 60-70%) and charcoal roasting, yielding bold, layered profiles with mineral backbone, stone fruit undertones, and lingering floral sweetness that persists over nine or more steepings.[98][99][100] Rolling techniques distinguish oolong styles: ball-rolled oolongs, common in Anxi and Taiwanese varieties, involve cloth-wrapped leaves subjected to mechanical or manual compression to create compact forms that enhance flavor extraction and storage stability, while strip-rolled oolongs, such as some Wuyi or Phoenix styles, are twisted lengthwise without tight balling, resulting in looser leaves with quicker infusion but potentially less nuanced aroma development.[97][101] Production centers in Fujian, particularly Anxi and Wuyi, contribute significantly to China's oolong output, with Fujian accounting for a substantial portion of the province's 461,000 tons of total tea production in 2019, though mass mechanized farming has shifted toward blended commercial grades that dilute the terroir-specific qualities of traditional hand-processed teas.[102][103] Taiwan's oolong production, emphasizing high-elevation cultivars, totals around 16,500 tons annually within its overall tea output, maintaining emphasis on artisanal methods for premium exports.[104]Black Teas
In China, black teas, referred to as hong cha (red tea), undergo full oxidation, resulting in a reddish-brown liquor and flavors ranging from malty and bold to fruity and smoky.[105] These teas originated as innovations in the late 19th century, with production expanding to meet growing Western export demands after the Opium Wars opened treaty ports and increased foreign trade access.[6] Key varieties include Qimen (Keemun) from Anhui Province and Dianhong from Yunnan Province, both prized for their complex profiles derived from orthodox processing methods.[106] Qimen black tea, produced from the Camellia sinensis var. sinensis cultivar in Qimen County, features tightly twisted, slender leaves that yield a light-bodied brew with notes of stone fruit, orchid, subtle smoke, and gentle malt without strong astringency.[107] Its aroma often includes floral and fruity elements, with a reddish-amber infusion color, reflecting artisanal rolling that preserves terroir-specific nuances.[108] Dianhong, conversely, employs larger-leaf orthodox styles from assamica-like bushes in Yunnan, delivering a bolder, maltier taste with richer body and hints of cocoa or spice, emphasizing regional high-altitude growth conditions.[105] Processing begins with withering to reduce moisture and initiate enzymatic changes, followed by orthodox rolling to rupture cell walls and expose polyphenols, then controlled oxidation—often termed "fermentation" in traditional contexts—where catechins convert to theaflavins (contributing briskness and brightness) and thearubigins (providing depth and red hues).[109] This contrasts with the crush-tear-curl (CTC) method prevalent in British-influenced production elsewhere, which accelerates oxidation for uniform, stronger brews but yields less nuanced flavors; Chinese methods prioritize gradual aeration in humid chambers to enhance subtlety.[110] Final firing halts oxidation, yielding teas with 40-70 mg of caffeine per 8 oz cup, typically higher than in green or white teas due to fuller polyphenol breakdown aiding extraction.[111] Despite their historical role in exports, Chinese black tea shipments faced a 35% value decline in 2024, totaling $171 million for 24,758 metric tons, amid falling global prices even as overall tea export volumes rose.[112] This reflects competitive pressures from lower-cost producers like India and Kenya, though premium orthodox varieties maintain niche appeal in connoisseur markets.[113]Dark Teas
Dark teas, classified as heicha in Chinese tea taxonomy, undergo post-fermentation dominated by microbial activity rather than enzymatic oxidation, resulting in earthy, umami-rich profiles through fungal and bacterial breakdown of polyphenols and fibers. This process, distinct from pre-fermentation steps in other categories, enables long-term maturation where microbes like Aspergillus species convert catechins into theabrownins, causally yielding the depth associated with aged specimens.[114][115]
Pu'er tea exemplifies dark teas, produced exclusively from Camellia sinensis var. assamica in Yunnan Province, where historical trade routes established a regional monopoly by the Song Dynasty (960–1279 CE), centralizing raw materials from ethnic minorities for imperial taxation and export. Varieties split into sheng (raw) Pu'er, which ferments slowly under ambient conditions over 10–50 years, and shou (ripe) Pu'er, developed in 1973 at Kunming Tea Factory via accelerated pile-fermentation to replicate aged effects amid demand surges.[116][117][118]
In shou production, leaves are piled moist (60–75% humidity) at 50–60°C for 45–60 days, fostering Aspergillus niger dominance among 93+ fungi and 53 bacteria, hydrolyzing starches and accelerating theabrownin formation for immediate drinkability with woody, damp-earth notes. Liu'an Heicha from Anhui Province, another key variety, involves steaming sun-dried greens followed by rice-hull fermentation, imparting medicinal, smoky qualities tied to regional microbial consortia.[119][115][120]
Wet-storage practices, prevalent in Guangdong and Hong Kong warehouses since the 1980s, expose compressed cakes to 80–90% relative humidity, surging mold activity to enhance camphor and fermented plum aromas via intensified theabrownin oxidation, though excessive moisture risks off-flavors like staleness; dry storage (40–60% RH) preserves brighter profiles but slows transformation. Empirical comparisons confirm wet methods causally deepen earthiness through bacterial surges, evidenced by higher gallic acid and lower catechins in analyzed samples.[121][122]
Fermentation yields lovastatin, a fungal statin analog at 0.1–2.5 mg/kg in ripe Pu'er, correlating with cholesterol reduction in rodent trials (e.g., 20–30% LDL drop at 0.5 g/kg doses), though human evidence remains preliminary and inconsistent due to bioavailability variability; counterfeits, comprising up to 30% of market by 2010s estimates, often dilute these via adulterated blends lacking microbial authenticity.[123][124][125]