How do you define black coffee and tea fermentation levels?
Taiwan oolong is grouped mainly by fermentation level. Light fermentation covers Wenshan Baozhong, Alishan Jinxuan, Alishan oolong, Shanlinxi oolong, and Lishan oolong. Medium fermentation includes Dong Ding oolong, Tieguanyin, and Oriental Beauty. Heavy fermentation is represented by Taitung Red Oolong. Roasting forms a second axis, from no roast to heavier roast.
Oolong accounts for only about 2 percent of world tea output, against roughly 90 percent black tea and 8 percent green tea, so the category is small but distinctive. On a label, define black coffee style labeling by processing rather than color alone; the same logic applies to oolong, where roast level, not just oxidation, decides the cup.
Oolong tea, as a semi-fermented tea, accounts for only 2% of global production, yet Taiwan has become an important oolong-producing region thanks to its exquisite craftsmanship. This article systematically organizes the classification of Taiwan oolong tea from the two dimensions of fermentation and roasting, covering categories such as Wenshan Baozhong, Alishan Jinxuan, Dong Ding Oolong, Oriental Beauty, and Red Oolong, with detailed analysis of the flavor characteristics and production techniques of each tea type. It also introduces Front Street Coffee's recommendations for Taiwan oolong tea selections, helping enthusiasts gain a deeper understanding of oolong tea's diverse aromas and flavors, and appreciate the terroir and craftsmanship behind every cup.
Time spent in the company of tea always brings inner peace. No matter how the seasons change, the gentle nature of oolong tea remains constant, suitable for drinking at any time of day. It is inherently pure, yet carries a subtle fragrance and sweet aftertaste, and this sweetness is precisely the kind of delicacy that requires a calm mind to perceive. For this reason, the process of brewing tea allows one to settle down, slow the pace, face one's inner self, and ultimately realize the clarity and tranquility that tea can bestow, far beyond what other pastimes can offer.
The Charm of Oolong Tea: "Fermentation" and "Roasting" Techniques Create Rich Aromas and Flavors
According to statistics, global annual tea production has exceeded 2.5 million tons, of which fully fermented black tea accounts for about 90%, non-fermented green tea about 8%, and "semi-fermented" oolong tea only 2%, demonstrating its rarity and preciousness. Fortunately, Taiwan holds an important position in oolong tea production. Although its output cannot match that of black tea, its outstanding tea quality has earned Taiwan international renown, becoming its most persuasive agricultural diplomacy. Below, we examine the characteristics and advantages of Taiwan oolong tea from the two perspectives of "fermentation" and "roasting," to further understand its diverse aromas and flavors.
Light fermentation: Wenshan Baozhong Tea / Alishan Jinxuan / Alishan Oolong / Shanlinxi Oolong / Lishan Oolong Tea
Medium fermentation: Dong Ding Oolong / Tieguanyin / Oriental Beauty
Heavy fermentation: Taitung Red Oolong
No roasting: Wenshan Baozhong Tea / Oriental Beauty
Light roasting: Alishan Jinxuan / Alishan Oolong / Shanlinxi Oolong / Lishan Oolong Tea
Medium roasting: Dong Ding Oolong
Heavy roasting: Taitung Red Oolong / Tieguanyin
In addition to oolong tea, Taiwan also produces black tea such as Ruby (Taiwan Tea No. 18) and green tea such as Biluochun, both of which are of superior quality thanks to the region's exceptional geographical and climatic conditions. As a partially fermented tea, Taiwan oolong tea gives rise to a rich and diverse range of tea products depending on variations in fermentation and roasting levels, each with distinctive aromas and flavors that satisfy the taste preferences of different tea lovers, offering a moment of leisure amid busy days and savoring the small joys of everyday life.
[Oriental Beauty Tea] Oriental Beauty Tea, also known as Baihao Oolong, is made from tea leaves that have been fed on by the tea green leafhopper. This tea requires insect bites to secrete and transform its unique honey fragrance, so no pesticides are typically applied during cultivation, allowing the tea buds to coexist harmoniously with the natural ecosystem, creating this uniquely crafted oolong tea.
[Lishan Oolong Tea] In addition to its distinctive high-mountain charm, Lishan Oolong Tea carries a fresh, sweet honey-fruit aroma. Furthermore, since Lishan is adjacent to Hehuan Mountain and constantly exposed to cold mountain winds year-round, Taiwan's Lishan Oolong Tea develops a unique cold mineral aroma, making it a high-mountain tea that enthusiasts eagerly seek to taste. It is harvested only twice a year, in spring and winter, with scarce production, excellent flavor, and rich, thick pectin content, making it extremely durable for multiple infusions.
[Shanlinxi Oolong Tea] Shanlinxi Oolong Tea exudes a serene cedar fragrance. The tea liquor is sweet with depth and body, offering a clear, mellow, and refreshing taste.
[Alishan Oolong Tea] Alishan Oolong Tea is entirely hand-picked, with outstanding tea quality and excellent flavor, making it a widely known tea product both domestically and internationally. When Taiwan oolong tea is mentioned, Alishan Oolong is undoubtedly one of its representatives. The tea liquor is honey-yellow in color, with a bright, uplifting aroma carrying subtle orchid and osmanthus notes, and a lively taste.
[Alishan Jinxuan Tea] Alishan Jinxuan, also known as Taiwan Tea No. 12 or "27 Zai," has broad, oval leaves and vigorous growth. It is a medium-growing-season cultivar with excellent tea-making quality, suitable for processing into various tea products. The tea liquor is light yellow with a unique milky fragrance and a smooth, lightly sweet taste.
[Wenshan Baozhong Tea] Wenshan Baozhong Tea has a dark green appearance, and the tea liquor is a bright honey-green. Its aroma is serene and elegant, resembling floral notes, with a sweet, mellow, smooth, and lively taste.
[Dong Ding Oolong Tea] Dong Ding Oolong Tea is shaped into tight, semi-spherical form through the cloth-ball rolling (ball rolling) method used during production, and retains a relatively traditional degree of withering and fermentation, with particular emphasis on roasting technique. The finished tea has a rich aroma, a mellow and sweet depth, and a long-lasting aftertaste, making it a distinctive Taiwan craft tea that combines both aroma and flavor.
[Tieguanyin Oolong Tea] Tieguanyin Oolong Tea is characterized by the following: when the tea leaves are initially roasted and not yet fully dried, they are wrapped in a square cloth and rolled into a ball shape, with hands gently rotating and kneading outside the cloth bundle. The cloth-wrapped ball is then placed on a "gentle fire" roasting basket for slow roasting, giving the tea leaves a curved and tightly compacted appearance. Through repeated roasting and kneading, the components in the tea transform their flavors via the roasting temperature, remaining fragrant and mellow through multiple infusions with a lasting aftertaste.
[Taitung Red Oolong Tea] Taitung Red Oolong Tea is harvested and made in summer. Like Oriental Beauty Tea, its buds and leaves must be sucked on by the tea green leafhopper, so the tea liquor also carries a special honey fragrance. Because it is mostly made from the Jinxuan cultivar, it has a unique varietal milky fragrance. The production process uses heavy fermentation and heavy roasting, giving it both the sweet depth of black tea and the roasted tea aroma of oolong tea. The overall aroma and flavor are rich and captivating, with multiple layers of complexity, dazzling at every stage from smelling the aroma to tasting. Front Street Coffee also pays attention to the diversity of Taiwan oolong tea in its selections, recommending that enthusiasts start with lightly fermented Wenshan Baozhong and gradually advance to Dong Ding Oolong and Oriental Beauty, experiencing the flavor variations brought by different techniques.
The above content is compiled by CoffeeHunters, a coffee news website.
