How Processing Shapes Aroma and Flavor in These Oolong Teas
Wuyi rock tea and Phoenix Dan Cong are both oolong teas, but their processing splits along fermentation and roasting. Rock tea is shaken more thoroughly and roasted harder, favoring body while still seeking aroma. Dan Cong is handled more lightly, prioritizing aroma over body. That single difference explains much of the gap in mouthfeel and aromatic expression.
Both teas pass through picking, withering, leaf shaking, pan-firing, rolling and drying. Refining is where they diverge: rock tea uses double pan-firing and double rolling plus slow simmering over low heat, and Dan Cong stays lightly fermented and lightly roasted to keep floral notes forward. The same distinction between fragrance vs aroma coffee applies when reading these styles.
Both belonging to the vast oolong tea family, Wuyi rock tea and Phoenix Dancong share many similarities in their production processes, yet each takes a distinct path in fermentation degree and roasting intensity. Rock tea leans toward emphasizing body while seeking aroma, whereas Dancong excels at prioritizing aroma while seeking body. The former undergoes more thorough and complete leaf shaking, while the latter is relatively lightly processed, resulting in a significant divergence in mouthfeel richness and aromatic expression. This article will systematically walk through the primary and refining processes of both, and delve into how key techniques such as double pan-firing and double rolling, and slow simmering over low heat, impart Wuyi rock tea its unique charm, while also revealing the logic behind Phoenix Dancong's light fermentation and light roasting that highlights floral fragrance. Whether you are a rock tea devotee or a Dancong enthusiast, you will gain a clear understanding of the craftsmanship.
Rock tea and Dancong each have their own emphasis in flavor pursuit: the former prioritizes body while seeking aroma, while the latter leans more toward prioritizing aroma while seeking body. In terms of the degree of leaf shaking, Wuyi rock tea is typically processed more thoroughly and completely than Phoenix Dancong, while Dancong is relatively lighter, which makes the finished rock tea often richer in mouthfeel than Dancong.
From the overall process perspective, Dancong and rock tea are largely the same, both going through stages such as leaf picking, withering, leaf shaking, pan-firing, rolling, and drying. The difference lies in the fact that rock tea is processed more deeply and heavily.
Wuyi rock tea and Phoenix Dancong both belong to the oolong tea category, the former being Minbei oolong and the latter Guangdong oolong. They share many similarities in production while each retaining unique craftsmanship characteristics.
I. Wuyi Rock Tea Production Process
According to the provisions of "GB/T 18745-2006 Geographical Indication Products: Wuyi Rock Tea," Wuyi rock tea refers to oolong tea produced within the administrative area under the jurisdiction of Wuyishan City, Fujian Province, in the unique natural ecological environment of the Wuyi Mountains, using suitable tea tree varieties propagated asexually or cultivated, and made through unique traditional processing techniques, possessing the quality characteristic of rock rhyme (rock bone and floral fragrance).
Wuyi rock tea production is divided into two major stages: primary processing and refining. The primary processing steps are: fresh leaves → sun withering or withering → leaf shaking → rolling → drying (initial drying, spreading to cool, re-drying) → rough tea. The refining process is: rough tea → lot blending and grading → screening for grade-specific tea materials → picking and winnowing → blending of screened grades → drying → spreading to cool → even blending → self-inspection → quantitative packaging → finished product tea.
II. Phoenix Dancong Tea Production Process
The current national standard "GB/T 30766-2014 Classification of Tea" stipulates: "Guangdong oolong tea: strip-shaped products made from fresh leaves of specific tea tree varieties in the Chaozhou and Meizhou regions of Guangdong through specific processing techniques."
According to the currently effective Guangdong provincial local standard "DB44/T 820-2010 Geographical Indication Products: Phoenix Dancong (Cong) Tea": "Phoenix Dancong (Cong) tea is oolong tea made under the natural ecological environment conditions within the scope specified in Chapter 3 of this standard, using strains and varieties separated and bred from Phoenix Shuixian, and produced according to unique traditional processing techniques, possessing unique floral fragrance, cong rhyme, and honey rhyme. Its finished tea, based on each unique natural floral fragrance characteristic, includes: yellow gardenia fragrance, zhilan fragrance, yulan fragrance, honey orchid fragrance, almond fragrance, ginger flower fragrance, cinnamon fragrance, osmanthus fragrance, night-blooming cereus fragrance, and jasmine fragrance, among other aroma types."
Phoenix Dancong tea production is likewise divided into primary processing and refining. The primary processing steps are: sun withering - cooling - leaf shaking (langcai) - kill-green (pan-firing) - rolling - drying. The refining process is: rough tea - lot blending - picking and screening out dust - blending (grading) - roasting (aroma enhancement) - spreading to cool - packaging - finished product tea.
III. Differences in Production Between Wuyi Rock Tea and Phoenix Dancong
In terms of production techniques, Phoenix Dancong and Wuyi rock tea have historically borrowed from each other. The main differences between the two center on two points: fermentation degree and roasting level. To highlight floral fragrance, Phoenix Dancong's fermentation degree is lighter than that of rock tea; likewise for the purpose of accentuating floral fragrance, its roasting primarily aims to dry the tea for ease of storage, without deliberately emphasizing the fire-craft aroma. Light fermentation is achieved through leaf-shaking techniques — rock tea uses "yaoqing" (shaking), while Phoenix Dancong uses "zuoshou" (hand manipulation), with less force and shorter duration; light roasting is achieved by controlling time — in the re-roasting stage, rock tea's re-roasting time typically lasts over ten hours, while Phoenix Dancong's re-roasting for aroma enhancement is much shorter.
Double pan-firing and double rolling is a technique unique to Wuyi rock tea production and is an extremely critical step. The second pan-firing can compensate for any shortcomings of the first pan-firing, promoting the formation and persistence of rock tea's aroma, flavor, and rhyme through reheating; the second rolling makes the rough tea's strips more tightly twisted and aesthetically pleasing. Double pan-firing and double rolling create Wuyi rock tea's distinctive "dragonfly head," "frog-skin texture," and "three-section color."
Wuyi rock tea emphasizes heavy, multiple rounds of roasting, resulting in a darker liquor color with a special "fire-craft aroma." The re-drying (re-roasting) in primary processing aims to bring the tea to the required fully-dry level, reducing the loss of tea aroma and the degradation of tea catechins. During re-roasting, the temperature should be lower than during the initial roast. After the tea reaches full dryness, it undergoes slow simmering over low heat, commonly known as "dunhuo" (simmering fire). Dunhuo is an important technique in the traditional production method of Wuyi rock tea. The slow simmering over low heat of Wuyi rock tea is an indispensable key step in the traditional method — subjecting the evenly blended and sorted tea to continuous, prolonged slow simmering over low heat not only removes moisture and preserves quality, but the prolonged low-temperature roasting of rock tea also promotes the transformation of the tea's internal substances, while using fire to regulate aroma and using fire to regulate flavor, further enhancing the fragrance and taste, achieving the effects of maturing the aroma, improving the liquor color, and increasing infusion durability. The superb technique of dunhuo is unique to Wuyi rock tea. "Wuyi rock tea roasted ten times becomes gold" and "Wuyi rock tea's flavor comes from the depth of roasting" — these ancient praises of Wuyi rock tea's charcoal roasting craft are vivid reflections of its craftsmanship value.
The above content is compiled by CoffeeHunters, a coffee news website.
