Gǔ yī hēi chá

Gu Yi Hei Cha is a post-fermented dark tea from Yī County (黟县, Yī Xiàn) in Anhui Province, also known by its historical name Ān Chá (安茶, Ān Chá) — “Tea from Anhui.” This tea, once celebrated by the Huìzhōu merchants (徽商, Huī shāng), traveled from imperial courts to pharmacies throughout Southeast Asia, where it was called “sacred tea” (圣茶, shèng chá) for its outstanding medicinal properties. After half a century of oblivion, Gu Yi Hei Cha is experiencing a renaissance, combining traditional Anhui technologies with modern approaches to dark tea production.

1. Classification and Origin:

Type: Post-fermented dark tea (hei cha, 黑茶, hēi chá). Belongs to the category of teas in which microbial fermentation plays a key role during the wò duī (渥堆, wò duī — “wet piling”) stage, as well as prolonged natural aging. By classification, this is one of the six main types of Chinese tea.
Category: Regional dark tea of Anhui Province, historical tea of Huizhou. Modern brand — “Gu Yi” (古黟, “Ancient Yi[xian]”), produced by “Huangshan Tianfang Tea Co., Ltd.” (黄山市天方茶叶有限公司). Includes four series: 茯砖 (fu zhuan), 天尖 (tian jian), 黑砖 (hei zhuan) and 花卷 (hua juan).
Origin: China (中国, Zhōngguó), Ānhuī Province (安徽省, Ānhuī Shěng), Huángshān City (黄山市, Huángshān Shì), Yī County (黟县, Yī Xiàn). The core of production is the high-mountain tea gardens of Měixī Township (美溪乡, Měixī Xiāng), where a tea plantation complex of more than one thousand mu (approximately 67 hectares) is located. Historically closely connected with the production of an chá (安茶) in neighboring Qímén County (祁门县, Qímén Xiàn), from where the tradition of reviving this tea came.
Geographic coordinates: Approximately 29°55′ North latitude, 117°56′ East longitude.
Alternative names: Ān Chá (安茶, Ān Chá) — historical trade name, literally “tea from An[hui]”; Ruǎn Zhī Chá (软枝茶, ruǎn zhī chá) — folk name, “tea with soft branches”; Yùn Hé Chá (运合茶, yùn hé chá) — ancient name, recorded in Song dynasty sources.

2. History and Cultural Significance:

History: The roots of Gǔ Yī Hēi Chá trace back to the Sōng dynasty (宋, Sòng, 960–1279). In the treatise “Xin’an Zhi” (《新安志》, “Records of Xin’an”), compiled during the Chunxi reign period (淳熙, Chúnxī, 1174–1189), the so-called “yun he cha” (运合茶) is mentioned — tea that arose as a result of natural fermentation of leaves during transportation. In the local dialect of Yi County, the word “he” (合) sounds similar to the word “hei” (黑 — “black”), which probably indicates a direct connection between this ancient tea and the modern dark tea of the region.

During the Míng (明, Míng, 1368–1644) and Qīng (清, Qīng, 1644–1912) dynasties, tea from Anhui gained wide recognition thanks to the Huizhou merchants — powerful traders from Huizhou who organized its large-scale export to Guangdong Province, Hong Kong, and Southeast Asian countries. It was during this period that the tea acquired the name “an cha” — an abbreviation of “Anhui tea.” Lǐngnán (岭南) — the region in southern China — became the main market: local doctors used an cha as medicine. The famous physician Fāng Zhèn (方珍) from Lingnan regularly prescribed an cha as medicinal tea.

According to legend, in 1725 the nun Miàojìng (妙静师太) from a mountain monastery in Yixian accidentally left twisted tea leaves overnight under the open sky. Morning dew and mist transformed them into a black mass, which the nun wrapped in bamboo leaves and hung to dry. Several years later, she brewed this forgotten tea during illness — and was healed. Thus, according to legend, the technology of an cha was born.

The period of the Republic of China (民国, Mínguó, 1912–1949) was a time of prosperity: in Yi County alone there were 47 tea houses (茶号, cháhào). However, the Anti-Japanese War and subsequent upheavals led to the complete cessation of production.

Revival began in the 1980s, when the first attempts were made in Qimen County to restore the lost craft. In 1983, Guān Fènfā (关奋发), chairman of the Hong Kong Tea Industry Development Foundation, sent a package with old an cha and a letter requesting the revival of “sacred tea” production to Anhui. It took almost a decade of experiments before in 1992 the quality of the restored tea was approved by Hong Kong experts. Master Wáng Zhenxiang (汪镇响) played a key role, collecting the technology piece by piece from the last bearers of tradition — old masters from the “Sun Yishun” (孙义顺) tea house. By 1992, production of an cha was successfully resumed at the “Jiangnan Chun” tea factory (江南春茶厂).

In 2010, entrepreneur Zhèng Lianjun (郑连军) founded the “Gu Yi Hei Cha Engineering Technology Research Center” (黄山市古黟黑茶工程技术研究中心) and in partnership with Ānhuī Agricultural University (安徽农业大学) and Huangshan Institute of Industrial Technology began systematic work to restore and modernize traditional dark tea production technologies in Yi County. Mechanized lines were developed while maintaining the manual basis of key stages.
Name:
- “Gu” (古) — “ancient, old,” emphasizes the centuries-old history of production.
- “Yi” (黟) — the name of Yi County, one of the most ancient in Anhui, famous for UNESCO monuments (Xidi and Hongcun villages).
- “Hei Cha” (黑茶) — “dark/black tea,” indication of the category according to Chinese classification.
- Thus, the full name translates as “Ancient dark tea from [Yi] County.”
Cultural significance: Gù Yī Hēi Chá is inextricably linked with the traditional culture of Huīzhōu (徽州, Huīzhōu). The tea custom “sigezi cha” (锡格子茶, xī gé zi chá) deserves special mention — a New Year hospitality ritual of Yi County. “Sige” is a multi-tiered tin box of local handicraft production, in whose four compartments local sweets (including the famous “qianzhang su” — “thousand-layer pastries”), tea eggs, and tea are placed. The treat is served with green or red tea and symbolizes wishes to “rise ever higher” (步步高升, bùbù gāoshēng) and “keep happiness in the house” (留福在家, liú fú zài jiā). Today, Gu Yi Hei Cha is also a calling card of Yi County as one of the five “black treasures” (五黑, wǔ hēi) of the county — alongside black rice, black chickens, black plums, and black sesame.

Modern production of Gu Yi Hei Cha is unique in that it combines tea craftsmanship with traditional Huizhou art of “three carvings” (徽州三雕, Huīzhōu sān diāo — wood, stone, and brick carving). Masters create decorative tiles, tea paintings, and sculptural compositions from pressed dark tea depicting Huizhou landscapes, turning tea into a work of art suitable for both drinking and collecting.

3. Botanical Description and Raw Material:

Variety / Cultivar: The main raw material consists of leaves from the Zhūyè Zhǒng cultivar (槠叶种, Zhūyè Zhǒng) — a medium-leaf and small-leaf variety of Camellia sinensis var. sinensis, belonging to the nationally recognized tea varieties of China (国家级良种, guójiā jí liángzhǒng). This same cultivar is the basis for producing the famous Qímén Hóng Chá (祁门红茶, Qímén Hóngchá — Keemun). Zhuye Zhong bushes are characterized by medium growth vigor, good resistance to cold and diseases, elliptical leaves with finely serrated edges, and rich green color.
Harvesting: Main harvesting is conducted in spring — from early April to late May. According to a local saying, “spring tea — a whole load, summer tea — just a handful, and don’t pick autumn tea even if you have to sell your children” (春茶一担、夏茶一头、卖儿卖女不采秋茶). A small amount of summer raw material (about 20% of spring) is permitted for blending; autumn leaf is not used.
Harvesting standard: Strict selection — one bud and two leaves (一芽二叶, yī yá èr yè). For tian jian, more tender raw material is used — one bud and one to two young leaves. Characteristic feature: the presence of a small stem (梗, gěng) is permitted and even welcomed, which is important for the microbial fermentation process and flavor formation.
Raw material requirements: Buds and leaves should be large, fleshy, with a pronounced stem. Yi County is famous for large-leaf (大叶种, dà yè zhǒng) tea, although the main cultivar belongs to the medium-leaf group. Raw material from high-mountain plantations in Meixi Township is especially highly valued for its enrichment with delicate floral notes from aromatic plants growing nearby.

4. Terroir and Cultivation:

Yi County is located in the southern part of Anhui Province, in the Huangshan mountain range. The terrain is predominantly mountainous-hilly with deep valleys — “mountains high, valleys deep” (山高谷深, shān gāo gǔ shēn). The area is characterized by abundant clouds and fog, providing diffused sunlight and high humidity — ideal conditions for tea bushes.
Growing altitude: Main plantations are located at 400–800 m above sea level. High-mountain gardens in Meixi Township reach 700–800 m.
Soils: Fertile, predominantly acidic red-yellow soils (红壤-黄壤), enriched with organic matter and minerals. High iron and aluminum content contributes to the formation of the characteristic flavor profile.
Climate: Northern subtropical humid monsoon (北亚热带湿润季风气候). Four distinct seasons: mild winter, warm summer. Average annual temperature 15–16°C. Annual precipitation 1500–1800 mm. Relatively few sunny days — cloudy, foggy weather predominates, which reduces catechin content and increases amino acid levels in the leaf.
Special features: Tea plantations are surrounded by groves of aromatic trees and shrubs (桂花, osmanthus; 兰花, orchid), whose aromas are absorbed by tea leaves during growth and subsequent natural aging. Yi County is also one of the country’s leading ecological tea-producing counties (全国生态产茶县).

5. Production Technology:

Production of Gu Yi Hei Cha represents a complex multi-stage process stretched over several months, and considering mandatory aging — over years. The technology combines elements of Hunan and traditional Anhui methods, adapted to local raw material.

Harvesting (采摘, cǎi zhāi): April — May, standard “one bud — two leaves” with short stem.
Shaqing — fixation / “kill-green” (杀青, shā qīng): High-temperature treatment in wok or on specialized mechanized lines to inactivate enzymes, stop oxidation, and soften the leaf. A special machine for shaqing has been developed, adapted for local raw material.
Rounian — rolling (揉捻, róu niǎn): Primary rolling to destroy cell membranes and release juice. Creates conditions for subsequent fermentation.
Wo dui — wet piling (渥堆, wò duī): Key stage that distinguishes dark tea from all other categories. Light fermentation technology (轻发酵, qīng fājiào) is used with formation of small piles (小堆, xiǎo duī) weighing from 50 to 500 kg. Every 4 hours, mixing and turning (翻堆, fān duī) is conducted to ensure uniform microbial processes and prevent overheating. This approach allows preservation of aromatic compounds that are lost during intensive fermentation.
Furou — re-rolling (复揉, fù róu): Additional rolling after wo dui to compact leaf structure and evenly distribute fermented juice.
Ganzao — drying (干燥, gān zào): Primary drying to reduce moisture to a level suitable for storage.
Qizheng tixiang — steam aroma lifting (汽蒸提香, qì zhēng tí xiāng): Characteristic stage for Gu Yi Hei Cha: steam treatment softens the leaf and activates the release of aromatic essential oils. This technique traces back to traditional an cha technology, when tea was steamed before packaging in bamboo baskets.
Yazhi chengxing — pressing (压制成型, yā zhì chéng xíng): Depending on the type of final product, tea is pressed into bricks (砖, zhuān), formed into cylindrical bundles (花卷, huā juǎn) in bamboo baskets, or left loose (散茶, sàn chá — for tian jian). When pressing tea bricks, Huizhou carving technique is applied to create decorative reliefs.
Chenhua — natural aging / maturation (陈化, chén huà): Minimum period — three years. Aging takes place in specialized wooden warehouses (专用木仓, zhuānyòng mù cāng) with temperature and humidity control. During storage, slow microbial fermentation continues, new aromatic compounds form, and taste softens. For fù zhuān (茯砖), the aging stage is accompanied by formation of “jinhua” (金花, jīn huā — “golden flowers”) — colonies of beneficial fungus Eurotium cristatum (冠突散囊菌, guàn tū sàn náng jūn).

6. Organoleptic Characteristics:

Dry leaf appearance: Depends on the form of release. Loose tian jian — dark, elongated tea particles with noticeable stems, color from dark brown to black-brown (乌褐, wū hè). Brick tea (fu zhuan, hei zhuan) — tightly pressed tiles with smooth surface; when broken, fu zhuan shows scatterings of golden dots — “jinhua” colonies. Hua juan — dense cylinder in bamboo basket.
Dry leaf aroma: Pronounced and distinctive. Dominated by notes of dried ginger (干姜, gān jiāng) and medicinal herbs (草药香, cǎo yào xiāng), creating a recognizable “ginger-herbal” profile. Depending on age and type, tones of green grass (青草香), candied fruits may be present, and fu zhuan has characteristic mushroom aroma of “jinhua.”
Liquor aroma: Multi-layered, unfolds dynamically. In first infusions, ginger and herbal notes predominate, gradually replaced by tones of dried fruits and candied fruits (果脯蜜饯香, guǒ pǔ mì jiàn xiāng). At the bottom of the cup (杯底香, bēi dǐ xiāng), the aroma lasts long — a characteristic feature of quality Gu Yi Hei Cha. Fu zhuan has a distinct mushroom tone “junhua xiang” (菌花香).
Taste: The first sip reveals slight bitterness (微苦, wēi kǔ) and noticeable astringency (收敛性强, shōu liǎn xìng qiáng), reminiscent of young sheng pu-erh character. However, bitterness quickly gives way to rapid sweet aftertaste (回甘快, huí gān kuài) — one of the calling cards of this tea. The liquor body is dense, thick (醇厚, chún hòu), texture silky and soft (柔滑, róu huá). With age, astringency softens and sweetness deepens. Ten-year-old and older teas are distinguished by oily, viscous texture (粘稠, niánchóu).
Liquor color: Orange-yellow (橙黄, chéng huáng), bright, clear. With increased aging time, color deepens to orange-red and reddish-brown. Young tea liquor may be lighter, with greenish tint.
Spent leaves (wet leaves): Leaves unfold, revealing dark brown color with reddish cast. Stems and whole leaves are noticeable. Leaf is elastic, not loose — a sign of proper fermentation.

7. Chemical Composition:

Polyphenols: Polyphenol content is lower than in green tea but significantly transformed due to microbial fermentation. Catechins are partially oxidized to theaflavins and thearubigins, which provide taste softness and rich liquor color. The presence of “golden flowers” in fu zhuan additionally modifies the polyphenolic profile: Eurotium cristatum breaks down part of the tannins, reducing astringency.
Amino acids: L-theanine is present, whose content is favored by high-mountain growing conditions under diffused light. Participates in forming soft, sweetish aftertaste.
Alkaloids: Caffeine (2–4% of dry weight), theobromine, theophylline. Due to prolonged fermentation and aging, free caffeine is partially bound with polyphenols, making the tonic effect softer and more prolonged compared to green tea.
Vitamins: B-group vitamins (B₁, B₂, B₆), vitamin PP (nicotinic acid), trace amounts of vitamin C. Content of fat-soluble vitamins (E, K) increases during microbial fermentation.
Minerals: Potassium, magnesium, manganese, fluorine, zinc, selenium. Tea from mountainous regions of Yi County contains increased amounts of manganese and zinc due to soil mineral composition.
Essential oils: Significant role in forming the unique ginger-herbal aroma. Volatile aromatic compounds include linalool, geraniol, citronellol, and a number of other terpenoids characteristic of post-fermented teas. The steam “aroma lifting” stage activates essential oil release.
Special features: Fu zhuan contains a complex of Eurotium cristatum metabolites, including up to 18 types of amino acids and more than 450 biologically active compounds. Also characteristic is the presence of lovastatin-like compounds involved in lipid metabolism regulation.

8. Health Properties:

Pronounced digestive improvement (消食, xiāo shí): Gu Yi Hei Cha is traditionally and justifiably considered one of the best “digestive teas.” Microbial enzymes break down fats and proteins, accelerating digestion of heavy food. The effect was especially valued by nomadic peoples and residents of southern provinces with fatty cuisine.
Lipid level reduction and obesity control (去肥腻, qù féi nì): Polyphenols and “golden flower” metabolites contribute to regulating cholesterol and triglyceride levels in blood. Tea is traditionally recommended after abundant, fatty meals.
Antioxidant action: Theaflavins and thearubigins, as well as microorganism metabolic products, have the ability to neutralize free radicals, slowing cellular aging processes.
Anti-inflammatory and antimicrobial action (清热止血, 解毒消肿, qīng rè zhǐ xuè, jiě dú xiāo zhǒng): Traditional Chinese medicine highly values an cha for its ability to “clear heat and stop bleeding,” “expel toxins and reduce swelling.” In the 19th century, Lingnan doctors used this tea to combat epidemics in Guangdong, and in 2003, demand for an cha sharply increased during the SARS outbreak — in southern China it was used as part of folk remedies.
Tonic effect (益寿提神, yì shòu tí shén): According to traditional assessments, the invigorating action of Gu Yi Hei Cha exceeds the effect of ordinary green tea, while being softer and more prolonged.
Intestinal microflora normalization: Probiotic properties associated with the presence of beneficial fungal metabolites (especially in fu zhuan) contribute to healthy intestinal microflora balance.
Cardiovascular system strengthening: Regular consumption of dark tea is associated with blood pressure reduction and improved vascular wall elasticity.

9. Brewing:

Water temperature: 100°C — boiling water. Full revelation of Gu Yi Hei Cha aroma and taste requires maximum temperature.
Tea amount: Ratio 1:40 (for example, 5 g tea per 200 ml water). For pressed tea — fill teapot approximately 1/4 volume.
Utensils: Ceramic teapot (陶壶, táo hú) or Yíxīng purple clay teapot (紫砂壶, zǐ shā hú) is preferable. The porous clay structure absorbs “storage taste” (堆味, duī wèi) characteristic of young dark tea and helps reveal pure aroma. For tasting, gaiwan is also suitable.
Process:
1. Warming utensils (温杯, wēn bēi): Rinse teapot and cups with boiling water for even warming.
2. Adding tea (投茶, tóu chá): Place tea in warmed teapot (approximately 1/4 volume for pressed tea, 5–7 g for loose).
3. Rinsing (洗茶, xǐ chá): Pour boiling water, hold for 5 seconds and immediately drain. This stage “awakens” the leaf and removes dust.
4. First infusion: Pour boiling water, steep for 15 seconds, pour out.
5. Second and third infusions: Steeping time 10 seconds.
6. Fourth–seventh infusions: Increase time to 20 seconds, then add 5–10 seconds with each subsequent infusion.
7. Final preparation: When tea begins to weaken in infusions (usually after 7–8th), remaining leaf can be placed in teapot for boiling (煮饮, zhǔ yǐn). Boiling is a traditional and recommended method for old (陈茶, chén chá) specimens: during boiling, deep notes are revealed that are not extracted by infusions.

10. Storage:

Gǔ Yī Hēi Chá belongs to the category of teas that improve with age (越陈越香, yuè chén yuè xiāng — “the older, the more fragrant”). Minimum recommended aging period is three years; optimal — from five years and more. Tea with 10+ years aging is considered mature and especially highly valued.

Location: Dry, cool, dark, well-ventilated room. Avoid direct sunlight.
Temperature: 15–30°C, without sharp fluctuations.
Humidity: 50–70%. Excessive humidity leads to unwanted molding, insufficient — to drying out and stopping maturation processes.
Container: Wooden warehouses (木仓) are used in production. At home, kraft paper, cardboard box, bamboo container are suitable. Storage without packaging in a special tea cabinet is acceptable. Completely airtight containers are categorically not recommended — tea must “breathe.”
Tea enemies: Foreign odors (store separately from spices, perfumery, household chemicals), direct sunlight, excessive moisture, insects.

11. Market and Price Range:

Gu Yi Hei Cha occupies the middle price segment among Chinese dark teas. Young tian jian is available at moderate price, while aged bricks and hua juan with multi-year aging can cost significantly more. Main pricing factors: tea age (陈化年份), product type (fu zhuan with abundant “jinhua” is valued higher), raw material quality (high-mountain raw material from Meixi is more expensive), artistic value (decorative tea bricks with Huizhou carving are collectible items).

How to avoid counterfeits:

Buy from verified sellers: Look for official “Gu Yi” (古黟) brand representatives or specialized tea shops. “Tianfang” company has more than 300 branded sales points throughout China.
Check appearance: Genuine Gu Yi Hei Cha has dark brown, charcoal-brown color. Leaf should be whole, with noticeable stems. Fu zhuan when broken should show visible “golden flowers” — evenly distributed golden dots. Gray or black coating without characteristic aroma is a sign of ordinary mold, not “jinhua.”
Evaluate aroma: Characteristic ginger-herbal tone should be present, without mustiness and sharp unpleasant odors. “Jinhua” aroma is pleasant, mushroom-like, reminiscent of forest smell.
Taste the liquor: Liquor should be clear, orange-yellow, with quick “returning sweetness.” Muddy, sour, or rancid liquor is a sign of spoilage or counterfeit.
Pay attention to price: Suspiciously low price for “aged” tea is reason for doubt. Genuine tea with ten-year aging cannot be cheap.

12. Recommended Sources:

“Gu Yi” (古黟) brand official representatives: Look for certified dealers of “Huangshan Tianfang Tea Co., Ltd.” (黄山市天方茶叶有限公司).
Specialized tea shops: Stores specializing in dark teas and pu-erh, with good reputation and ability to provide authenticity certificates.
Direct purchase in Yi County: Visit tea gardens in Měixī Township (美溪乡) or production facilities in Yi County for guaranteed authenticity.
Tea exhibitions and fairs: Major tea exhibitions in China where producers present their products directly.
Online platforms: Reputable online tea retailers with good reviews and return policies, preferably those specializing in Anhui teas.

Conclusion:

Gu Yi Hei Cha is a tea with an amazing fate: born in the mountain mists of ancient Huizhou, celebrated by merchants in Southeast Asian markets, forgotten for half a century, and revived through enthusiasts’ efforts. It carries the spirit of two great tea traditions — Anhui refinement and Hunan solidity, combining them into a unique product equally interesting to lovers of sheng pu-erh (for the “wild” astringency of young specimens) and connoisseurs of aged hei cha (for the velvety depth of mature tea). Its ginger-herbal aroma, rapid “returning sweetness,” and amazing ability to transform from unruly young tea into a soft, oily elder make Gu Yi Hei Cha one of the most promising “sleeping giants” among Chinese dark teas. For those seeking something beyond the mainstream of pu-erhs and Anhua hei cha — this is a true discovery.

13. Varieties of Gu Yi Hei Cha:

Fú Zhuān (茯砖, Fú Zhuān) — “Fu-brick”: Tea pressed into brick form, whose main characteristic is the presence of “golden flowers” (金花, jīn huā), colonies of the beneficial fungus Eurotium cristatum. Possesses a characteristic mushroom aroma (菌花香), mild, slightly sweet taste. Considered most beneficial for digestion and lipid metabolism regulation. The most recognizable variety of Gu Yi Hei Cha.
Tiān Jiān (天尖, Tiān Jiān) — “Heavenly Tip”: Loose (unpressed) tea made from the most tender raw material. Distinguished by a higher degree of fragrance, elegant and refined taste compared to pressed varieties. Clean, clear aroma with ginger-floral notes. Ideal for daily brewing with short steeps.
Hēi Zhuān (黑砖, Hēi Zhuān) — “Black Brick”: Densely pressed tea of dark, almost black color. Distinguished by high density and durability, which ensures excellent preservation during long-term storage. Full, rich taste with pronounced astringency. Suitable for multi-year aging.
Huā Juǎn (花卷, Huā Juǎn) — “Flower Roll”: Tea pressed into cylindrical form in a bamboo basket — analogous to Húnán qiān liàng chá (千两茶). Inside the cylinder, slow post-fermentation continues for many years. The most “collectible” form of release with maximum potential for maturation.

In Conclusion:

Gu Yi Hei Cha is a tea with an amazing destiny: born in the mountain mists of ancient Huizhou, glorified by merchants in Southeast Asian markets, forgotten for half a century and revived through the efforts of enthusiasts. It carries within itself the spirit of two great tea traditions — Anhui refinement and Hunan solidity, combining them into a unique product equally interesting to lovers of sheng puer (for the “wild” astringency of young specimens) and connoisseurs of aged hei cha (for the velvety depth of mature tea). Its ginger-herbal aroma, rapid “returning sweetness” and amazing ability to transform from an unruly young tea into a soft, oily elder make Gu Yi Hei Cha one of the most promising “sleeping giants” among Chinese dark teas. For those seeking something beyond the mainstream of puers and Anhua hei cha — this is a true discovery.