Taiwanese Tea: A Beginner's Guide to Oolong, GABA, Ruby 18 and More

Taiwanese tea is the family of specialty teas grown on the island of Taiwan, led by ball-rolled high-mountain oolongs from Alishan, Shan Lin Xi, Lishan and Da Yu Ling, and extending through roasted Dong Ding, Jin Xuan milk oolong, Bao Zhong, Oriental Beauty, Sun Moon Lake Ruby 18 black, GABA oolong, and small but serious green and white teas. Taiwan is physically smaller than Belgium, but its tea industry punches far above its weight because of altitude, cultivar research, and a domestic market that pays serious prices for quality.

This guide walks through what Taiwanese tea actually is, why the island produces so many distinct styles, and what a beginner should pick up first.

Key takeaways

• Taiwan's tea industry traces to Fujian migrants in the late 18th century, and its modern quality ladder was built by the Taiwan Tea Research and Extension Station, which defines "high-mountain tea" as any tea grown at or above 1,000 metres.
• TTES No. 18 (Hong Yu / Red Jade), the cultivar behind Sun Moon Lake black tea, was released in 1999, not the 1940s, from a cross between Burmese Camellia sinensis var. assamica and a native Taiwanese wild tea.
• GABA tea was invented in Japan by Tojiro Tsushida at the National Food Research Institute in 1987, and Taiwanese producers adapted the method to oolong to build the modern GABA oolong category.
• High-mountain oolongs are open-grown rather than shade-grown, and their sweetness comes from cool temperatures and diffuse cloud light slowing growth, so leaves retain more free theanine and fewer astringent catechins.
• Jin Xuan ("milk oolong", TTES No. 12) is a flagship Taiwan cultivar with a naturally creamy, milky note that is cultivar-derived, not added as flavouring. Most "milk oolong" sold cheap in the West is sprayed tea, not real Jin Xuan.

In this guide

• What Taiwanese tea actually is
• Why Taiwan's geography grows exceptional tea
• High-mountain oolong: Taiwan's flagship
• Jin Xuan and the milk oolong story
• Dong Ding: the roasted classic
• Bao Zhong: the greenest oolong
• Oriental Beauty: the leafhopper tea
• GABA oolong: Taiwan's signature functional tea
• Sun Moon Lake black tea and Ruby 18
• Taiwanese green and white tea
• Taiwan's main tea regions at a glance
• How to brew Taiwanese tea
• Where to start
• Frequently asked questions

What Taiwanese tea actually is

Tea cultivation arrived in Taiwan in the late 18th century, when migrants from Fujian province brought cuttings of the Qing Xin (also written Chin Shin, "green heart") oolong cultivar across the strait and planted them in the hills of Nantou County. The first commercial centres grew around Lugu, Pinglin and the foothills near Taipei, and the island's tea industry was essentially a southward extension of Fujian's Anxi and Wuyi traditions for its first century.

Taiwan's tea took on its own identity through export. In 1869, the British trader John Dodd and the Chinese compradore Li Chun-sheng shipped the first branded "Formosa Oolong" from Taiwan to New York, and for the next fifty years Formosa Oolong was the island's most famous product on Western markets. Under Japanese colonial rule from 1895 to 1945, the government-general set up a Tea Research Station in Pinglin in 1903, which eventually became the Taiwan Tea Research and Extension Station, the institutional backbone of modern Taiwanese tea. The Japanese period is also when Taiwan began experimenting with large-leaf Burmese assamica varieties around Sun Moon Lake as a black-tea export play.

The Taiwan we recognise today, with high-mountain oolong at the top of the ladder and competition culture driving quality, is mostly a product of the 1980s and 1990s. As the domestic economy grew, Taiwan shifted from bulk export to premium consumption. High-altitude gardens opened on Alishan, Shan Lin Xi, Lishan and Da Yu Ling. Regional farmers' associations built annual competitions that rewarded the best lots with dramatic price premiums. The result is a tea industry that is tiny in volume compared with China, Kenya or India, and extremely serious about quality at the top end.

Why Taiwan's geography grows exceptional tea

Taiwan is roughly the size of Belgium, but its central mountain range climbs to almost 4,000 metres, so a small island packs more altitude variation than most tea countries. That altitude, combined with subtropical humidity and volcanic and slate soils, is the reason Taiwanese tea tastes the way it does.

Cool temperatures at height slow the tea plant's growth. The shoots push out less aggressively, and the leaf spends more time accumulating aromatic precursors before harvest. Diffuse cloud light, which blankets Taiwan's high-mountain gardens most mornings, further damps the plant's photosynthetic rate. A 2022 shading study on tencha documents how reduced light shifts nitrogen metabolism, so leaves retain more free L-theanine and accumulate fewer astringent catechins. Taiwan high-mountain oolong is open-grown rather than shaded under cloth, but the mechanism is the same. Slow, cool, cloud-diffused growth produces sweetness instead of bitterness.

TRES defines gao shan cha ("high-mountain tea") as tea grown at or above 1,000 metres. The commercial high-mountain regions fall roughly between 1,000 and 2,400 metres, with a handful of historic plots above 2,500 metres on Da Yu Ling. Parts of Alishan's growing area sit below the 1,000-metre line, so "Alishan tea" is not automatically high-mountain tea in the strict sense.

Soils matter too. The north of the island is volcanic. The central mountains are limestone and slate. Nantou County sits on a mix of both. Each tea region develops a characteristic mineral signature, and Taiwanese drinkers take that terroir seriously.

High-mountain oolong: Taiwan's flagship

High-mountain oolong, or gao shan cha, is Taiwan's most celebrated category. These teas are typically made from the Qing Xin cultivar, processed in the modern qing xiang ("clear fragrance") style, oxidised only lightly, and rolled into tight balls that unfurl over many steeps.

The oxidation range usually cited for modern high-mountain oolong is 10 to 20 percent. Oxidation percentages in oolong are vernacular estimates rather than measured values, so treat the numbers as descriptive. What matters in the cup is the combination of floral aroma (gardenia, lily, osmanthus), a creamy texture, and a long, sweet finish. A 2021 processing review in Food Science and Human Wellness covers how the degree of oxidation shifts tea's aromatic profile between green, oolong and black.

The signature high-mountain regions, roughly from lowest to highest, are Alishan (around 800 to 1,400 metres, with the best plots above 1,000m), Shan Lin Xi (1,200 to 1,800 metres), Lishan (1,600 to 2,400 metres), and Da Yu Ling, which spans roughly 2,000 to 2,600 metres and where the highest historic plots in the Fushou Shan area were largely closed under a National Forest reclamation program after 2014. Da Yu Ling tea is famously expensive because production is tiny.

High-mountain oolongs are made twice a year on most gardens, with spring harvests delivering the most aromatic, floral character and winter harvests leaning toward thicker body and deeper sweetness.

Jin Xuan and the milk oolong story

The single biggest gap in most beginner guides to Taiwanese tea is Jin Xuan, and it is also the most commonly misunderstood Taiwan tea abroad.

Jin Xuan is TTES No. 12, a cultivar released by the Taiwan Tea Research and Extension Station in 1981 after decades of breeding work at Yuchi Branch. It produces a ball-rolled, qing xiang-style oolong, usually grown at mid elevations of 300 to 800 metres, that carries a naturally creamy, milky, butter-cookie aroma on top of standard high-mountain oolong florals. That milky note is cultivar-derived. It is not added, it is not flavouring, and it shows up even in plain hot water with no dairy anywhere near the cup.

The problem is that the name "milk oolong" has been heavily commercialised. A lot of the cheap "milk oolong" sold in the West is ordinary oolong sprayed with milk-flavoured syrup or blended with dairy essences. The difference is obvious when you brew them side by side: real Jin Xuan gives a subtle, natural creaminess that fades gracefully across several steeps, while flavoured imitations taste like tea-scented coffee creamer and stop being milky the moment the fragrance washes out.

This is one category where buying from a source that names the cultivar and the producing region matters. Our Zero Milk Jin Xuan oolong is an unflavoured Jin Xuan from a named garden, and the product name is a deliberate reminder that the milky character is the tea, not a dairy additive.

Dong Ding: the roasted classic

Dong Ding oolong comes from Lugu Township in Nantou County, one of the earliest commercial tea areas on the island. It is made from Qing Xin and related cultivars, rolled into a tighter ball than qing xiang high-mountain oolong, oxidised further (commonly in the 20 to 40 percent vernacular range), and then roasted.

The roasting is what separates Dong Ding from the floral high-mountain style. Traditional Dong Ding is roasted over charcoal in multiple sessions, spread across weeks, with the tea resting between passes so the heat has time to migrate through the leaf without scorching it. Light-roast, medium-roast and heavy-roast versions taste like different teas. A light-roast Dong Ding keeps a lot of the green fragrance and adds a toasted grain note. Medium moves toward caramel, stone fruit and a warming body. Heavy roast, sometimes called "traditional" Dong Ding, lands in dried longan, baked bread crust and dark brown sugar territory, and can age for years.

Lugu Farmers' Association runs one of Taiwan's most famous annual tea competitions, and a competition-grade Dong Ding from a ranked Lugu producer is one of the most expensive things you can drink in the Taiwanese tea world.

Bao Zhong: the greenest oolong

Bao Zhong (also written Pouchong) comes from Pinglin, southeast of Taipei in New Taipei City. It is made mostly from Qing Xin and Qing Xin Gan Zai cultivars, and it sits at the greenest end of the oolong spectrum: oxidised only 8 to 15 percent and processed strip-style rather than rolled into balls.

Bao Zhong's history is arguably as long as Dong Ding's. Pinglin was one of the first Taiwan tea areas to develop an independent identity under the Japanese, and Bao Zhong's pronounced orchid and lily aroma, along with its pale yellow-green liquor, makes it the most obvious bridge between green tea and oolong in the Taiwan catalogue. If you enjoy Japanese sencha or a very fresh Chinese green tea, Bao Zhong is the gateway Taiwanese oolong.

Oriental Beauty: the leafhopper tea

Oriental Beauty, or Bai Hao oolong, is Taiwan's most unusual oolong and the only tea category built on insect damage. It is produced mainly in Hsinchu County, around Beipu and Emei, and in parts of Miaoli.

Oriental Beauty is made only in summer, which is normally a low-quality harvest season. Farmers deliberately avoid pesticides so that small green leafhoppers, Jacobiasca formosana, can feed on young shoots. Leafhoppers are phloem feeders: they pierce the leaf with needle-like stylets and drink sap, so strictly speaking they do not "bite" the tea. The damage triggers a jasmonate-mediated herbivore-induced defence response in the plant, which elevates a group of aroma volatiles including (E)-nerolidol and hotrienol. Those compounds are responsible for the honey and muscatel character that finished Oriental Beauty is famous for.

The processed tea is heavily oxidised, roughly 60 to 70 percent, with a dark amber liquor and flavours of ripe peach, honey, rose and dried fruit. There is a persistent story that the English name "Oriental Beauty" was given by Queen Elizabeth II, who was said to have loved the tea. Serious sources treat this as legend. The export name Formosa Oolong predates her reign, and no Buckingham Palace record of the event exists. The tea is worth drinking regardless.

GABA oolong: Taiwan's signature functional tea

GABA tea is one category where the popular story often gets the attribution wrong. It was invented in Japan, not Taiwan. Dr. Tojiro Tsushida and colleagues at Japan's National Food Research Institute, now part of NARO, published the original nitrogen-chamber method in 1987. The goal at the time was to find a way to naturally increase gamma-aminobutyric acid in food products for people with hypertension.

What Taiwan did was take the processing step and apply it to oolong. Tsushida's original work was on green tea. Taiwanese producers, already experts at rolled, semi-oxidised oolong, discovered that sealing freshly picked leaves in a nitrogen chamber for six to ten hours before the normal processing steps produced a smooth, fruity oolong with elevated GABA content. By the 2000s Taiwan had become the leading commercial source of GABA oolong, and the category is now strongly associated with the island even though the underlying technique is Japanese.

The chemistry is real. Under anaerobic conditions, the enzyme glutamate decarboxylase converts glutamate in the leaf to GABA. The Japanese "Gabaron" threshold for a commercial GABA tea is at least 150 milligrams of GABA per 100 grams of dry leaf, and quality Taiwanese producers publish HPLC figures on request.

The health story deserves hedging. Oral GABA crosses the blood-brain barrier poorly, so the mechanism behind any calming effect from a cup of GABA tea is debated. A 2020 systematic review of oral GABA supplementation in PubMed found limited but suggestive evidence that GABA supplementation can reduce subjective stress markers, with effective supplement doses in the 100 to 300 milligram range. A cup of GABA tea delivers roughly 7 to 20 milligrams of GABA, a much smaller amount than the studied supplement doses, so treat GABA oolong as a pleasant calming addition to your routine rather than a treatment for anxiety. For a deeper look at the category, see our guide to GABA tea and our full GABA tea collection.

Sun Moon Lake black tea and Ruby 18

Sun Moon Lake, in central Nantou County, is the home of Taiwan's most distinctive black tea. The Japanese set up an experimental station at Yuchi during the colonial period specifically to grow Burmese assamica black tea for the export market, and the resulting cultivar programme eventually produced TTES No. 18, known as Hong Yu or Red Jade, released by TRES Yuchi Branch in 1999.

TTES No. 18 is a cross between a Burmese Camellia sinensis var. assamica mother and a native Taiwanese wild tea, Camellia sinensis var. formosensis. The parentage produces a black tea unlike almost anything else on the market: spearmint, cinnamon, eucalyptus and ripe fruit, with a light honeyed body and almost no astringency. If you are used to Assam's malt or Ceylon's brisk citrus, Ruby 18 sounds exotic because it is. It is a genuine Taiwan creation, not a European-style black tea.

Our Sun Moon Ruby is a Ruby 18 from the Sun Moon Lake area and is the cleanest entry point to Taiwanese black tea. It also brews beautifully at slightly cooler temperatures than most black teas, which helps the mint-cinnamon aromatics stand up.

Taiwanese green and white tea

Taiwan is not usually thought of as a green tea country, but it makes serious green tea in small volumes. The main areas are Sanxia (New Taipei City), where Bi Luo Chun and Long Jing are produced, and parts of Nantou, where Qing Xin and TTES cultivars are occasionally processed as green tea instead of being rolled into oolongs. These teas tend to be sweeter and less grassy than their Chinese equivalents because Taiwan's humid climate produces more amino acid-rich leaf.

Our Green Heart is processed from the Qing Xin cultivar, the same one used for most of Taiwan's flagship high-mountain oolongs. Treating an oolong cultivar as a green tea produces a gentle, softly floral cup that sits between Chinese green tea and the low-oxidation oolong style.

Taiwanese white tea is newer still. Producers on the island have started applying minimal processing, withering and drying with little to no rolling or oxidation, to the same cultivars that make Taiwan's best oolongs. Our Cold Bloom is one of this new wave, and it shows that Taiwan's terroir is capable of producing layered, slow-evolving white teas as well.

Taiwan's main tea regions at a glance

• Alishan, Chiayi County, around 800 to 1,400 metres, floral high-mountain oolongs
• Shan Lin Xi, Nantou County, around 1,200 to 1,800 metres, cool misty high-mountain oolongs
• Lishan, Taichung, around 1,600 to 2,400 metres, some of Taiwan's most prized and expensive oolongs
• Da Yu Ling, Taichung and Hualien border, around 2,000 to 2,600 metres, rarest and highest category
• Lugu and Dong Ding, Nantou, lower elevation, heartland of roasted oolong
• Pinglin, New Taipei City (southeast of Taipei), home of Bao Zhong
• Sun Moon Lake, Nantou County, black-tea district and home of TTES No. 18
• Beipu and Emei, Hsinchu County, Oriental Beauty country
• Sanxia, New Taipei City, green tea specialist region
• Nantou lowlands (Mingjian, Zhushan), Taiwan's main commercial GABA oolong belt

How to brew Taiwanese tea

Most Taiwanese teas respond to both gongfu and Western brewing. Gongfu reveals more detail across steeps, Western is easier if you only have a mug and a kettle.

For high-mountain oolong, Jin Xuan and other qing xiang-style rolled oolongs:

• Gongfu: 5 to 6 grams in a 100 ml gaiwan, water at 90 to 95 degrees Celsius, first steep 30 to 45 seconds to let the tight ball open, then 20 to 30 seconds per steep, expect 6 to 10 infusions.
• Western: 3 grams per 300 ml, 90 degrees Celsius, 3 to 4 minutes, one or two re-steeps.

For Dong Ding and roasted oolong:

• Gongfu: 5 to 7 grams in a 100 ml gaiwan or small teapot, water at 95 to 100 degrees Celsius, 15 to 20 seconds per steep, expect 8 to 12 infusions.
• Western: 4 grams per 300 ml, 95 degrees Celsius, 3 minutes.

For Oriental Beauty:

• Gongfu: 4 to 5 grams in a 100 ml gaiwan, water at 85 to 90 degrees Celsius (the high oxidation level does not need boiling water), 30 to 45 seconds on the first steep, shorter on subsequent ones.
• Western: 3 grams per 300 ml, 85 degrees Celsius, 3 minutes.

For Sun Moon Ruby and other Taiwanese black teas:

• Gongfu: 4 to 5 grams in a 100 ml gaiwan, water at 90 to 95 degrees Celsius, 10 to 15 seconds on the first steep.
• Western: 3 grams per 300 ml, 90 degrees Celsius, 3 to 4 minutes.

For Bao Zhong, treat it more like a green tea: 4 grams, 85 to 90 degrees Celsius, 2 to 3 minutes Western, or short gongfu steeps of 20 to 30 seconds.

Where to start

A useful first Taiwan sampler has three teas: a qing xiang high-mountain oolong (for the flagship floral style), a Jin Xuan (for the cultivar-derived milky note and to separate real milk oolong from flavoured imitations), and either Sun Moon Ruby for a completely new kind of black tea or an Oriental Beauty for the honey and muscatel story. A GABA oolong is worth adding once you have a feel for standard Taiwanese oolong, because the comparison is what makes GABA's flavour profile interesting.

You can browse the whole range in our Taiwanese tea collection, which sits within the broader oolong tea collection for context.

Frequently asked questions

What is Taiwanese tea?

Taiwanese tea is the tea grown on the island of Taiwan from the Camellia sinensis plant, mostly as semi-oxidised oolong but also as black, green, white and GABA tea. The category is built around ball-rolled high-mountain oolongs from regions like Alishan, Shan Lin Xi, Lishan and Da Yu Ling, alongside distinct styles like Dong Ding, Bao Zhong, Oriental Beauty, Jin Xuan milk oolong, Sun Moon Lake Ruby 18 black tea and Taiwan-style GABA oolong.

Is Taiwanese tea better than Chinese tea?

Neither is better across the board. Taiwan specialises in a narrower range of styles than China and invests heavily in high-altitude oolong and competition culture. Chinese tea covers many more categories and price points. Most serious tea drinkers keep both on the shelf and treat Taiwan as the go-to for clean, floral high-mountain oolong, Jin Xuan milk oolong, and Ruby 18 black tea, and China as the source for Wuyi rock tea, dark teas, yellow tea, and a deeper range of green and white teas.

What is milk oolong and is it real tea?

Milk oolong is the English name for tea made from the Jin Xuan cultivar (TTES No. 12), released by the Taiwan Tea Research and Extension Station in 1981. Real Jin Xuan has a naturally creamy, butter-cookie aroma that comes from the cultivar itself, not from added flavouring. A lot of the cheap "milk oolong" sold in Western supermarkets is standard oolong sprayed with milk-flavoured syrup. If the package does not name Jin Xuan or a Taiwan growing region and the leaf smells intensely dairy straight out of the bag, it is almost certainly flavoured.

Is Taiwanese oolong high in caffeine?

Taiwanese oolongs sit in the moderate caffeine range, roughly 30 to 60 milligrams per cup depending on the cultivar, harvest and brewing method. Younger, bud-rich spring harvests and high-mountain material tend to be slightly higher, heavily roasted Dong Ding slightly lower. It is less caffeinated than most black tea and more caffeinated than most hojicha or aged white tea. The calming effect many drinkers describe comes from the combination of caffeine with L-theanine, not from low caffeine content.

What is the best Taiwanese tea for beginners?

A qing xiang high-mountain oolong or a Jin Xuan is the friendliest starting point. Both are rolled, both tolerate imperfect brewing, and both deliver a clean, sweet, floral cup that shows what Taiwan does best. If you already drink a lot of floral oolong and want to try something new, Sun Moon Ruby (Ruby 18) and Oriental Beauty are the two Taiwan teas that taste most unlike anything else on the market. GABA oolong is worth adding once you are comfortable with standard Taiwan oolong, so you can hear the anaerobic-processing difference clearly.