Sìjì chūn hóng zhū · new.thetea.app

Sijichun “Red Pearl” is a heavily oxidized Taiwanese oolong made from leaves of the famous cultivar Sìjìchūn (四季春, Sìjì Chūn), or “Four Seasons Spring.” This tea occupies a unique intermediate position between classic oolong and red tea (black tea): the oxidation level reaches 80–90%, which gives it a deep honey-fruity character while preserving the recognizable floral nature of the original cultivar. The dark brown leaves, rolled into tight ball-shaped “pearls,” unfold in an infusion of warm amber-cognac tones, offering a soft, enveloping flavor without bitterness.

1. Classification and Origin:

Type: Oolong (烏龍茶, Wūlóng Chá) — semi-oxidized tea with a high degree of oxidation (80–90%). By oxidation level, this tea belongs to the category of “red oolongs” (紅烏龍, Hóng Wūlóng), occupying a borderline position between oolongs and red tea (black tea). The oxidation process is stopped before complete oxidation, which allows it to be classified as an oolong rather than red tea.
Category: Taiwanese heavily oxidized oolong. Belongs to the “red oolong” direction, which became widespread in Taiwan after 2008, when the Taitung Branch of the Tea Research and Extension Station (茶業改良場臺東分場, Cháyè Gǎiliáng Chǎng Táidōng Fēnchǎng) developed and popularized the red oolong production technology.
Origin: Táiwān (臺灣, Táiwān), Nántóu County (南投縣, Nántóu Xiàn), Míngjiān Township (名間鄉, Míngjiān Xiāng). Mingjian is one of the largest tea-producing areas on the island, located in the western part of Nantou County, on foothill terraces north of the Zhuóshuǐ River (濁水溪, Zhuóshuǐ Xī). More than 90% of the township’s terraced areas are occupied by tea plantations, making it the most densely concentrated tea region in Taiwan. Besides Mingjian, the Sìjìchūn cultivar is also grown in Chiayi (嘉義, Jiāyì), Yúnlín (雲林, Yúnlín), and Táoyuán (桃園, Táoyuán) counties, but “Red Pearl” is most characteristic of Mingjian.
Geographic coordinates: Approximately 23°51′ North latitude, 120°41′ East longitude.
Alternative names: Taiwan Four Seasons ‘Red Pearl’ Oolong Tea (English), Four Seasons Black Pearl (English), 四季春紅烏龍 (Sìjì Chūn Hóng Wūlóng — “Four Seasons Red Oolong”).

2. History and Cultural Significance:

History: The Sìjìchūn (四季春, Sìjì Chūn) cultivar was discovered in 1985 by a tea farmer in the Mùzhà (木柵, Mùzhà) area in northern Taiwan. Among his Tiěguānyīn (鐵觀音, Tiě Guānyīn) bushes, he noticed several plants with unusually rapid growth. Upon detailed study, it was found that this was a natural semi-wild hybrid — presumably the result of crossing the cultivars Hóngxīn Waiwei Táo (紅心歪尾桃) and Qīngxīn (青心, Qīngxīn). Initially, the cultivar was named Liuji Xiāng (六季香, Liùjì Xiāng — “Six Seasons Fragrance”), reflecting its ability to yield up to six harvests per year. Subsequently, the more poetic name Sijichun — “Four Seasons Spring” — became established, emphasizing the spring freshness of aroma at any time of year.

The cultivar quickly spread across the island, especially in low-mountain areas such as Mingjian, thanks to its high yield, disease and drought resistance, and expressive floral aroma. Unlike the other two “daughters” of Taiwanese tea cultivation — Jīnxuān (金萱, Jīn Xuān, TRES № 12) and Cuìyù (翠玉, Cuì Yù, TRES № 13) — Sìjìchūn was not bred by the Táiwān Tea Research and Extension Station (茶業改良場, Cháyè Gǎiliáng Chǎng) and does not have a TRES number.

The production technology of “Red Pearl” represents an adaptation of the red oolong direction that emerged in 2008 in Lùyě (鹿野, Lùyě), Taitung County. Mingjian farmers applied the principles of deep oxidation and intensive rolling to Sijichun leaves, creating a unique product with characteristic pearl shape and rich honey-fruity profile.
Name: Each component of the name carries semantic meaning:
- Sijì (四季) — “four seasons,” indicates year-round harvesting;
- Chūn (春) — “spring,” emphasizes the spring freshness of aroma;
- Red Pearl (紅珠, Hóng Zhū) — describes the leaf rolling form (tight ball-shaped “pearls”) and reddish tint due to high oxidation.
Cultural significance: “Red Pearl” symbolizes the democratization of quality Taiwanese tea. While high-mountain oolongs — Ālǐshān (阿里山, Ālǐshān), Líshān (梨山, Líshān), Shānlínxī (杉林溪, Shānlínxī) — require specific conditions and manual labor, “Red Pearl” allows obtaining a rich, multifaceted infusion from accessible low-mountain raw material. The tea is valued for its stable quality, flavor softness, and versatility — it is equally good hot or cold brewed, making it popular in domestic and international markets.

3. Botanical Description and Raw Material:

Species: Tea plant (Camellia sinensis var. sinensis).
Cultivar: Sìjìchūn (四季春, Sìjì Chūn). Natural semi-wild hybrid, probable result of crossing cultivars Hongxin Waiwei Tao and Qingxin. Bushes from medium to large height, with dense, well-branched crown. Young buds have a characteristic lavender tint in early growth stages. Leaves are lanceolate, medium length (4–6 cm), light green with small pointed serrations along the edge. Mesophyll is thick, slightly glossy. Venation is distinct, lateral veins branch from the central vein at 30–60° angles. Tea buds have medium pubescence. Characterized by early budding period and abundant flowering. The cultivar has high disease resistance and moderate drought tolerance.
Harvesting: Harvest is collected up to 6 times per year thanks to the exceptional productivity of the cultivar. Main harvesting periods: early spring (March–April), late spring (May), summer (June–July), late summer (August), autumn (October), and early winter (November–December). Spring harvest is traditionally considered the most aromatic and valuable. For “Red Pearl,” summer and autumn harvests are more often used, when leaves accumulate more polyphenols, which is favorable for deep oxidation.
Picking standard: Flush — bud with 2–4 developed leaves. Leaves should be young but sufficiently mature to ensure flavor fullness during heavy oxidation.
Raw material requirements: For “Red Pearl,” leaves with denser structure and pronounced veins are preferred, capable of withstanding intensive mechanical action during rolling into balls. Machine picking is often used, which is characteristic of the Mingjian area and ensures product accessibility.

4. Terroir and Cultivation:

Region: Míngjiān (名間鄉, Míngjiān Xiāng), Nantou County, central-western Taiwan. The township is located north of the Zhuoshui River, at the foot of the Jíjí Mountains (集集, Jíjí). Territory extends 13.7 km from west to east and 9.1 km from north to south, total area — 86.2 km². Nantou is the only landlocked county in Taiwan, the largest tea-producing region on the island with a total tea plantation area of about 8,100 hectares.
Growing altitude: 200–500 meters above sea level. Maximum elevation in the Jiji Mountains area reaches 404 m. Low elevations and warm climate promote rapid bush growth and high yields, but reduce amino acid concentration compared to high-mountain teas. For “Red Pearl,” this is not a disadvantage: with high oxidation, polyphenols play the predominant role, not amino acids.
Soils: Predominantly red clay and loamy soils (紅壤, hóng rǎng), characteristic of Nantou foothills. Red soils are rich in iron and minerals, which positively affects the tea’s mineral profile and gives the infusion characteristic depth.
Climate: Subtropical monsoon. Average annual temperature — 22–25°C. Precipitation — 1,500–2,000 mm per year, concentrated in the period from May to August. Sufficient sunlight and moisture ensure intensive growth of tea bushes practically year-round.
Features: The Sijichun cultivar is distinguished by exceptional adaptability to various growing conditions. Its high disease resistance allows some farmers to practice organic farming without pesticides. Thanks to the flat and gentle terrain of Mingjian, mechanized harvesting is widely used here, significantly reducing production costs.

5. Production Technology:

The production of “Red Pearl” combines elements of traditional Taiwanese ball-shaped oolong technology with techniques characteristic of red oolongs: deep oxidation, intensive rolling, and (in the classic version) final roasting. The key difference from regular Sijichun oolong is the much longer oxidation stage, bringing the tea closer to red teas in infusion character.

Picking (採摘 — cǎi zhāi): Mechanized or hand picking of young flushes (bud + 2–4 leaves). For “Red Pearl,” hand picking is preferable as it ensures more uniform raw material.
Solar withering (日光萎凋 — rìguāng wěidiāo): Freshly picked leaves are spread in a thin layer outdoors under the sun. The master periodically stirs and mixes the leaves for even dehydration. Duration — from 30 minutes to several hours depending on weather and humidity. Goal — initial moisture loss (up to 20–30%) and initiation of oxidative processes.
Indoor withering (室內萎凋 — shìnèi wěidiāo): Leaves are moved indoors, spread on bamboo or steel trays. The dehydration process and moisture redistribution within the leaf continues.
Shaking / Tossing (搖青 — yáo qīng): Leaves are placed in bamboo or mechanical drums and periodically shaken. Mechanical action damages leaf edges, destroys cell walls, and activates fermentation. This stage is repeated several times with increasing intensity, alternating with rest periods. For “Red Pearl,” tossing is conducted more intensively and repeatedly than for lightly oxidized oolongs.
Oxidation / Fermentation (氧化 — yǎnghuà / 發酵 — fājiào): Key stage determining the “red” character of the tea. Oxidation is conducted to 80–90% — significantly higher than traditional Taiwanese oolongs (8–40%). Leaves are left under controlled temperature and humidity conditions, allowing polyphenols (catechins) to transform into theaflavins and thearubigins. These compounds give the infusion its amber-red color and characteristic sweetness. The process continues for several hours but stops before complete oxidation, preserving “oolong” complexity.
Fixation / “Kill-green” (殺青 — shā qīng): Brief high-temperature treatment in heated rotating drums to deactivate enzymes and stop oxidation. Temperature — about 200–300°C, duration — several minutes. In Taiwan, heated drums (hot air) are traditionally used for this, less often — hand heating in a wok.
Rolling (揉捻 — róuniǎn): Leaves are given the characteristic form of tight ball-shaped “pearls.” Taiwanese production uses a multi-stage process: leaves are placed in cloth bags and rolled with a mechanical press, then opened, kneaded, and the cycle repeated many times. For “Red Pearl,” rolling is intensive, resulting in tight, dense nodules.
Drying (乾燥 — gānzào): Final drying with hot air to remove residual moisture (to 3–5% level) and fix shape and aroma. Temperature — about 80–110°C.
Feature: Unlike classic Dòngdǐng oolong (凍頂烏龍, Dòng Dǐng Wūlóng), this tea often does not undergo final roasting (焙火 — bèihuǒ), which preserves its fresh fruity and floral notes. However, some producers conduct light or medium roasting, enhancing caramel tones. Red oolongs that have undergone roasting are also suitable for aging (陳放, chénfàng) as aged tea.

6. Organoleptic Characteristics:

Dry leaf appearance: Tight, tightly rolled irregular round nodules-”pearls.” Color — dark brown, almost black, with reddish or bronze sheen. Grain size — 5–8 mm in diameter. Surface slightly glossy.
Dry leaf aroma: Intense, sweet, multi-layered. Dominated by notes of honey and baked fruits — plum, apricot, peach. Berry tones (raspberry, rose hip) and light floral tones of gardenia and honeysuckle are present, inherited from the Sijichun cultivar. When the leaf is warmed in a gaiwan, the aroma unfolds more fully, adding notes of burnt sugar and caramel.
Liquor aroma: Rich, warm, enveloping. Honey-fruity profile is complemented by nuances of caramel, dark molasses, and light mineral notes. As the infusion cools, floral tones characteristic of the original cultivar emerge.
Taste: Soft, smooth, enveloping, with full, “round” body. Practically no astringency or bitterness even with prolonged steeping. Sweet notes of honey and ripe stone fruits (plum, apricot) dominate. Middle palate — light acidity reminiscent of red berries (raspberry) and mineral taste. Aftertaste is long, honey-sweet, with berry and slightly astringent finish. The tea has pronounced returning sweetness (huí gān) (回甘, huí gān).
Liquor color: Bright, clear, from golden-amber to reddish-cognac. In first infusions — lighter, honey-golden; with increased exposure — rich amber-red. High transparency.
Spent leaves (wet leaves): Leaves fully unfold, demonstrating integrity and size. Color — dark brown with pronounced red-copper edges (red rim — 紅邊, hóng biān), indicating deep oxidation. The central part of the leaf may retain a darker, olive-brown tint. Leaves are soft, elastic, with noticeable veins.

7. Chemical Composition:

As a heavily oxidized oolong, “Red Pearl” differs from lightly oxidized teas in the predominance of catechin transformation products — theaflavins and thearubigins — which brings its chemical profile closer to red tea (black tea).

Polyphenols: Total polyphenol content — about 8–12% in dry matter. Due to deep oxidation, a significant portion of catechins (EGCG, EGC, ECG) has transformed into theaflavins (giving the infusion brightness and “liveliness”) and thearubigins (responsible for color depth, body fullness, and sweetness). The ratio of theaflavins to thearubigins determines the quality of red oolongs — a high level of theaflavins is considered a marker of good raw material and producer skill.
Amino acids: L-theanine content is moderate (lower than in shaded or high-mountain teas, but sufficient to soften caffeine effects). L-theanine promotes relaxation without drowsiness and improves concentration. Total free amino acid content — about 1.5–3%.
Alkaloids: Caffeine (about 1.0–1.5% of dry weight, corresponding to ~20–35 mg per 150 ml cup with standard brewing). Theobromine and theophylline are also present in insignificant amounts.
Vitamins: B-group vitamins (B₁, B₂, B₃), vitamin E, vitamin K. Vitamin C content is reduced compared to green teas due to oxidation.
Minerals: Potassium, calcium, magnesium, manganese, zinc, fluorine, iron. Red clay soils of Mingjian enrich the tea’s mineral profile.
Essential oils: Contain linalool, geraniol, nerol, α-farnesene, and other terpenoid compounds determining the complex fruity-floral aroma. The Sijichun cultivar is distinguished by increased content of aromatic compounds in the floral spectrum, which are partially preserved even with deep oxidation.
Unique features: Due to high oxidation, “Red Pearl” contains significantly more theaflavins and thearubigins than regular Sijichun oolong (10–20% oxidation). This provides more pronounced antioxidant action characteristic of red teas, combined with the aromatic profile of oolong.

8. Health Properties:

Antioxidant action: Theaflavins and thearubigins are powerful antioxidants protecting cells from free radical damage. Studies show that the antioxidant activity of heavily oxidized teas is comparable to green teas, although the mechanisms of action differ.
Cardiovascular system support: Theaflavins help reduce “bad” cholesterol (LDL) levels and strengthen blood vessel walls. Regular oolong consumption is associated with reduced cardiovascular disease risk.
Digestive improvement: Polyphenols and thearubigins stimulate digestive enzyme production and improve intestinal motility. Due to its softness, “Red Pearl” does not irritate gastric mucosa, unlike more aggressive green teas.
Mild tonic effect: Moderate caffeine content combined with L-theanine provides balanced alertness — increased concentration and performance without nervousness and sharp energy spikes.
Metabolism improvement: Oolongs with high oxidation stimulate thermogenesis and lipid metabolism, which may help maintain normal weight.
Immune support: Polyphenols have antibacterial and antiviral properties, strengthening the body’s natural defense mechanisms.
Cognitive functions: The combination of L-theanine and caffeine improves attention, memory, and information processing speed. L-theanine promotes generation of brain alpha waves associated with calm concentration.
Skin condition: Antioxidants (theaflavins, vitamin E) help slow skin aging processes, protecting from ultraviolet damage.

9. Brewing:

Water temperature: 90–95°C. High temperature is necessary to open the tight “pearls” and fully extract the rich flavor of heavily oxidized oolong. Boiling water (100°C) is not recommended to avoid excessive astringency.
Tea amount: 5–7 g per 100–150 ml water for flash steeping method (gongfu tea, 功夫茶, gōngfū chá); 3–4 g per 250 ml for steeping in cup or teapot.
Teaware: Porcelain gàiwǎn (蓋碗, gàiwǎn) — universal option allowing pure aroma expression. Yíxīng clay teapot (宜興紫砂壺, Yíxīng zǐshā hú) — well suited for oolongs, porous clay “remembers” tea and enriches infusion over time. Glass teapot — convenient for observing “pearl” opening. Porcelain European-style teapot is also suitable for steeping.
Process (flash steeping method — gongfu tea):
1. Warm gaiwan or teapot with boiling water, drain.
2. Add dry tea, cover for a few seconds, inhale aroma of warmed leaf.
3. Rinse: pour 90–95°C water and immediately drain (within 3–5 seconds). This “awakens” the leaf and washes away tea dust.
4. First infusion: pour water and steep 15–30 seconds.
5. Pour infusion into cups through strainer or through fairness cup (公道杯, gōngdào bēi).
6. Subsequent infusions: increase steeping time by 10–15 seconds with each infusion.
7. Tea withstands 5–8 full infusions, maintaining flavor and aroma. In later infusions, deeper mineral and woody tones emerge.
Steeping (European method): 3–4 g per 250 ml, temperature 90°C, steeping time — 3–4 minutes. 2–3 re-steepings possible with increased time.
Cold brewing (Cold Brew — 冷泡茶, lěng pào chá): Tea excellently unfolds in cold brewing: 5–10 g per 1 L cold water, steep in refrigerator 6–10 hours. Cold infusion emphasizes honey-fruity notes and is practically devoid of bitterness and astringency.

10. Storage:

Container: Airtight, opaque container — tin with tight lid, vacuum foil bag, or ceramic tea caddy.
Conditions: Dry, cool place with temperature 15–25°C, away from direct sunlight. Relative humidity — no higher than 60%.
Tea enemies: Moisture, foreign odors (tea actively absorbs aromas), direct sunlight, sharp temperature fluctuations.
Storage period: Under proper conditions — 1.5–2 years without significant quality loss. Heavily oxidized oolongs are more stable in storage than lightly oxidized ones. Does not require refrigerator storage (unlike green teas).
Aging potential: Specimens that have undergone final roasting (焙火, bèihuǒ) can be aged and over time acquire deeper, “autumnal” tones — dried fruits, old wood, honey. Aging requires porous ceramic container and stable microclimate.

11. Price and Counterfeits:

Price category: Accessible-medium price segment. Thanks to high yield of Sijichun cultivar, possibility of machine picking, and low-mountain plantation location, “Red Pearl” costs significantly less than high-mountain Taiwanese oolongs made by hand (Alishan, Lishan, Dayuling). This is one of the best price/quality ratios among Taiwanese oolongs. Price varies depending on specific producer, harvest season, and presence/absence of hand picking.
How to avoid counterfeits:
- Buy from verified suppliers with transparent supply chains and indication of specific region and harvest season.
- Evaluate appearance: Genuine “pearls” are tightly rolled, uniform dark brown color with reddish sheen, without admixture of green or black fragments.
- Check aroma: Natural tea has clean, multi-layered honey-fruity aroma. Sharp, “chemical,” or unnaturally bright smell may indicate use of artificial flavorings.
- Evaluate infusion: Color should be clean and transparent, from golden-amber to reddish-cognac. Cloudy or unnaturally dark infusion is a sign of low quality.
- Beware of suspiciously low prices: If price is significantly below market — possible substitution with cheaper varieties or use of Vietnamese or Thai tea from Sijichun cultivar (cultivar is actively grown in Thailand and Vietnam) sold as Taiwanese.

12. Interesting Facts:

The original name of the cultivar — Liuji Xiāng (六季香, “Six Seasons Fragrance”) — reflected the actual number of harvests per year. The later and more poetic name Sìjìchūn (四季春, “Four Seasons Spring”) proved commercially more successful and became established in common use.
Sijichun is called one of the “three daughters” of Taiwanese tea cultivation alongside Jīnxuān (金萱, TRES № 12) and Cuìyù (翠玉, TRES № 13). However, unlike the “sisters” bred in Taiwan Tea Research and Extension Station laboratories, Sijichun is nature’s child, discovered accidentally among Tieguanyin bushes.
Thanks to smooth texture and natural sweetness, “Red Pearl” practically never becomes bitter even with significant over-steeping — a property rare among teas and especially valuable for beginning tea enthusiasts.
The Sijichun cultivar has been actively “exported” to Thailand (Doi Mae Salong area, Chiang Rai Province) and Vietnam, where it has adapted well to low-mountain plantations. However, Mingjian’s terroir with its red soils gives Taiwanese tea an unmistakable mineral tone.
Red oolongs are one of the youngest categories of Taiwanese tea, officially existing only since 2008. “Red Pearl” from Sijichun cultivar is an example of Mingjian farmers’ creative approach, applying new technology to proven raw material and obtaining an original product with unique character.

13. Comparison with Other Taiwanese Oolongs:

Sìjìchūn Oolong (四季春烏龍, Sìjì Chūn Wūlóng) — lightly oxidized (10–20%): Classic version of tea from the same cultivar. Liquor color — pale yellow with greenish tint. Aroma — bright, floral (gardenia, honeysuckle). Taste — fresh, “green,” with light sweetness and creamy finish. Principal difference from “Red Pearl” — in oxidation degree: 10–20% versus 80–90%, giving completely different flavor profile.
Dòngdǐng Oolong (凍頂烏龍, Dòng Dǐng Wūlóng) — medium-heavily oxidized (30–40%), with roasting: From Lùgǔ (鹿谷, Lùgǔ) area, Nantou County. More traditional, with pronounced roasting, caramel-nutty profile, and greater “warm” depth. Differs from “Red Pearl” in lower oxidation but more pronounced roasting. Uses predominantly Qingxin cultivar.
Red oolong from Taitung (臺東紅烏龍, Táidōng Hóng Wūlóng): “Founder” of the genre, produced in Lùyě (鹿野, Lùyě) township. Oxidation — ~80%, heavy roasting mandatory. Aroma — tropical fruits, honey, cocoa. Differs from “Red Pearl” in heavier roasting and somewhat different terroir (eastern coast of Taiwan). Cost is generally higher.
Dōngfāng Měirén (東方美人, Dōngfāng Měirén — “Oriental Beauty”): Heavily oxidized oolong (60–80%) from Hsinchu (新竹, Xīnzhú). Key difference — use of leaves damaged by leafhoppers (小綠葉蟬, xiǎo lǜ yè chán), giving the tea unique muscat-honey character. More expensive and labor-intensive to produce.
Jīnxuān Red Oolong (金萱紅烏龍, Jīn Xuān Hóng Wūlóng): Red oolong from Jinxuan cultivar (TRES № 12). Distinguished by milky-creamy tones characteristic of this cultivar, combined with honey sweetness of red oolong. Less pronounced florality compared to “Red Pearl.”

In Conclusion:

Sijichun “Red Pearl” is a Taiwanese oolong that successfully combines accessibility and complexity. Deep oxidation reveals unexpected facets in the “Four Seasons Spring” cultivar leaves: instead of familiar light florality — rich honey-fruity bouquet, warm amber infusion, and enveloping softness comparable to the best red teas, but without their straightforwardness. The tea is equally magnificent when brewed gongfu style, in a cup with long steeping, and cold — a rare quality making it truly universal.

“Red Pearl” is ideal for those seeking entry into the world of Taiwanese oolongs without a high price threshold, as well as for experienced connoisseurs wishing to expand their understanding of Sijichun cultivar possibilities. This is tea for unhurried evening tea sessions, for introducing friends to gongfu tea culture, and for hot summer days — when cold “Red Pearl” infusion offers a refreshing, honey alternative to familiar beverages.

12. Interesting Facts:

The Sijichun cultivar became the first Taiwanese tea plant successfully adapted for cultivation in Southeast Asia. Today, plantations of this cultivar can be found in northern Thailand (Doi Mae Salong), Vietnam (Dalat), Myanmar and even Indonesia, although the flavor characteristics of tea from these regions noticeably differ from the Taiwanese original.

The name “Red Pearl” (紅珠, hóng zhū) has a double meaning: it reflects not only the shape of the rolled leaf, but also an ancient Chinese metaphor, where the pearl symbolizes a hidden treasure that reveals itself only with proper handling — similar to how tightly rolled leaves reveal their rich flavor when brewed.

Research by the Taiwan Tea Research and Extension Station showed that the Sijichun cultivar possesses one of the highest photosynthetic activity indicators among tea plants, which explains its exceptional productivity and ability to accumulate aromatic compounds even under conditions of intensive exploitation.

In 2019, “Red Pearl” from Mingjian received a gold medal at an international tea competition in Las Vegas, surpassing more expensive high-mountain oolongs, which confirmed the growing recognition of the quality of low-mountain Taiwanese teas with proper production technology.

11. Price and Counterfeits:

“Red Pearl” belongs to the accessible segment of Taiwanese oolongs, which is due to the high productivity of the Sijichun cultivar (up to 6 harvests per year), the possibility of mechanized harvesting and the location of plantations in low mountains. Retail price varies from $15-20 per 100 g for machine-picked tea to $40-60 for handcrafted tea from well-known producers.

Main types of falsification include substitution of Taiwanese tea with cheaper Vietnamese or Chinese analogues from the same cultivar, use of old re-graded raw material, flavoring of low-quality tea with synthetic additives. Signs of authenticity include: uniformity of leaf rolling, absence of tea crumbs and dust, clean multifaceted aroma without “chemical” notes, transparency of infusion, ability to withstand multiple brewings without loss of flavor.

When purchasing, attention should be paid to indication of specific production area (Mingjian, Nantou), harvest season, presence of origin certificates. Reliable suppliers provide detailed information about the producer and the possibility of tasting before purchase.

10. Storage:

Proper storage is critically important for preserving the organoleptic qualities of tea. Optimal storage temperature is 18-22°C at relative air humidity of 50-60%. Sharp temperature fluctuations are unacceptable, as they cause moisture condensation inside the packaging.

Ideal containers are airtight tin cans with double lids or vacuum packages made of multilayer foil. Ceramic tea caddies are suitable for short-term storage provided there is a tightly fitting lid. Transparent containers should be avoided, as ultraviolet radiation accelerates degradation of polyphenols and essential oils.

When conditions are observed, the storage period is 18-24 months without significant quality loss. Signs of spoilage include the appearance of musty odor, loss of characteristic aroma, change of leaf color to grayish-brown. Unlike green teas, “Red Pearl” does not require refrigerator storage — the stability of oxidized polyphenols allows storing tea at room temperature.

9. Brewing:

Optimal revelation of the flavor-aromatic potential of “Red Pearl” is achieved by observing certain brewing parameters. Water should be soft (total mineralization 50-150 mg/l), with neutral pH (6.5-7.5). Filtered or bottled water with low calcium and magnesium content is ideal.

For brewing by the gongfu cha method (功夫茶, gōngfū chá), a ratio of 5-7 g tea per 100-150 ml water is used. Water temperature of 90-95°C ensures complete opening of tightly rolled leaves without extracting excessive astringency. The first rinse (洗茶, xǐ chá) lasting 3-5 seconds awakens the leaf and removes tea dust. Steeping times for subsequent infusions: 1st — 20-30 sec, 2nd — 30-40 sec, 3rd — 40-50 sec, with an increase of 10-15 seconds for each following infusion.

When brewing in a European-style teapot, 3-4 g per 250 ml water is used, steeping time 3-4 minutes. For cold brewing (冷泡, lěng pào), the optimal ratio is 8-10 g per liter of cold water, extraction time in the refrigerator — 8-12 hours. Cold infusion emphasizes fruit-honey notes and is practically devoid of astringency, making it an ideal summer drink.

8. Health Benefits:

Sijichun “Red Pearl” possesses a wide spectrum of biologically active properties due to its unique chemical composition. Theaflavins demonstrate powerful antioxidant activity, surpassing vitamin E in some parameters. They effectively neutralize free radicals, including superoxide anion, hydroxyl radical and singlet oxygen, protecting cell membranes from oxidative damage.

The cardioprotective action of the tea manifests through several mechanisms. Theaflavins inhibit oxidation of low-density lipoproteins (LDL), reducing the risk of atherosclerosis. Regular consumption promotes improvement of vascular endothelial function, normalization of blood pressure and reduction of total cholesterol levels by 5-10%. Tea polyphenols also possess antithrombotic effects, reducing platelet aggregation.

Metabolic effects include stimulation of thermogenesis through activation of brown adipose tissue, improvement of insulin sensitivity and modulation of lipid metabolism. The combination of caffeine and L-theanine provides sustained enhancement of cognitive functions — improvement of attention, working memory and information processing speed without side effects such as anxiety or sleep disturbance. Antimicrobial properties of polyphenols manifest against Streptococcus mutans (caries prevention), Helicobacter pylori and some pathogenic strains of E. coli.

7. Chemical Composition:

The chemical profile of “Red Pearl” is determined by the high degree of oxidation, as a result of which deep transformation of the polyphenolic complex occurs. Original catechins (EGCG, EGC, ECG, EC) under the action of polyphenol oxidase and peroxidase enzymes are converted into theaflavins (1-2% dry weight) and thearubigins (8-12% dry weight).

Theaflavins, including theaflavin (TF), theaflavin-3-gallate (TF-3-G), theaflavin-3’-gallate (TF-3’-G) and theaflavin-3,3’-digallate (TF-3,3’-DG), are responsible for color brightness and “liveliness” of taste. Thearubigins — larger polymeric molecules — provide body fullness, softness and sweetness of the infusion. The ratio of theaflavins to thearubigins (approximately 1:6) is considered optimal for red oolongs.

Free amino acid content is 2-3%, with L-theanine accounting for about 50% of the total amount. Also present are glutamic acid, aspartic acid, serine and arginine. The alkaloid complex is represented by caffeine (1.2-1.8%), theobromine (0.05%) and trace amounts of theophylline. The essential oil fraction includes more than 300 volatile compounds, among which linalool, geraniol, benzyl alcohol, phenylethyl alcohol and methyl salicylate dominate.

6. Organoleptic Characteristics:

The dry leaf of Sijichun “Red Pearl” consists of tightly rolled granules of irregular spherical shape with a diameter of 5-8 mm. Color varies from dark brown to almost black with a characteristic reddish or bronze sheen on the surface. When rubbed between fingers, density and elasticity are felt, indicating proper rolling.

The aroma of the dry leaf is intense, sweet, with dominant notes of floral honey, ripe stone fruits (apricot, peach, plum) and light hints of baked apple. When warmed in a gaiwan, additional nuances of caramel, vanilla and barely perceptible floral tones of honeysuckle are revealed.

In the infusion, the tea demonstrates a rich palette of flavors. First steepings give a soft, enveloping taste with pronounced honey sweetness and fruit notes. As it cools, the floral character typical of the cultivar manifests — hints of gardenia and magnolia. The texture of the infusion is dense, oily, with a long sweet aftertaste (回甘, huí gān). The color of the infusion evolves from golden-amber in the first steepings to rich cognac-red in subsequent ones, while maintaining transparency and brilliance.

5. Production Technology:

The production of Sijichun “Red Pearl” represents a complex multi-stage process requiring precise control of parameters at each stage. After picking, fresh leaves undergo primary sorting to remove damaged and non-standard flushes.

Solar withering (日光萎凋, rìguāng wěidiāo) is conducted on special bamboo trays with a layer thickness of no more than 3-4 cm. Duration depends on the intensity of solar radiation and air humidity, ranging from 30 minutes to 2 hours. Leaves lose 15-25% of their original moisture, becoming soft and elastic.

The key stage is the process of shaking and oxidation. Leaves are placed in rotational drums where mechanical damage to leaf edges occurs. The process is repeated 4-6 times with rest intervals, during which enzymatic oxidation of polyphenols takes place. For “Red Pearl,” the total oxidation duration reaches 12-16 hours at a temperature of 25-28°C and relative humidity of 85-90%. The degree of oxidation is controlled visually by the change in leaf color from green through bronze to dark brown with reddish edges.

Fixation (殺青, shā qīng) is conducted in drum roasting machines at a temperature of 280-320°C for 5-8 minutes. Rapid heating inactivates enzymes, stopping oxidation at the required stage. Subsequent rolling is performed using the “buqu” technology (布球, bùqiú) — leaves are wrapped in cloth and subjected to pressure in special machines, forming characteristic dense “pearls.” The process is repeated 20-30 times with intermediate loosening. Final drying at a temperature of 95-105°C reduces moisture to 3-5%.

4. Terroir and Growing Characteristics:

Mingjian Township is located in the western part of Nantou County, in a valley between the Bagua Mountain range (八卦山, Bāguà Shān) and Taiwan’s central mountain massif. The uniqueness of the terroir is determined by a combination of several factors. Red lateritic soils (紅壤, hóng rǎng), rich in iron and aluminum oxides, provide good drainage and impart characteristic mineral notes to the tea. Soil pH is slightly acidic (5.5-6.5), which is optimal for the tea plant.

The region’s climate is characterized by clearly expressed seasonality with hot humid summers and relatively cool winters. Average annual temperature is 22-24°C, with a maximum up to 35°C in July-August and a minimum around 10°C in January. Annual precipitation reaches 1800-2000 mm, with the main portion falling during the period from May to September. Morning fogs rising from the Zhuoshui River (濁水溪, Zhuóshuǐ Xī) create natural shading, protecting leaves from excessive insolation.

Plantations are located on gentle slopes and terraces at an altitude of 200-500 meters above sea level. Despite the relatively low elevation, the difference between day and night temperatures reaches 8-12°C, which promotes the accumulation of aromatic substances in the leaves. Mingjian farmers practice a system of integrated plantation management, combining traditional methods with modern agrotechnical techniques, including drip irrigation and targeted application of organic fertilizers.

3. Botanical Description and Raw Material:

The Sijichun cultivar belongs to the species Camellia sinensis var. sinensis and represents a natural hybrid combining the best qualities of its parent forms. Bushes reach medium height (1.5-2 meters) with a spreading, well-branched crown. Young shoots have a characteristic purple-green tint, which is especially noticeable in the spring period.

Leaves are lanceolate in shape, 4-6 cm long, with pronounced gloss and dense structure. The edge of the leaf blade is finely serrated, venation is pinnate with a distinctly expressed central vein. A feature of the cultivar is the increased content of aromatic compounds in the glandular hairs covering the underside of the leaf.

For the production of “Red Pearl,” a picking standard of “one bud with 2-4 leaves” is used. Optimal is considered picking when leaves have reached 70-80% maturity — they should be sufficiently tender to preserve aroma, but at the same time contain sufficient polyphenols for deep oxidation. Unlike high-mountain oolongs, where exclusively hand picking is valued, for “Red Pearl” the use of mechanized harvesting is permitted, which significantly reduces production costs without critical loss of quality.

2. History and Cultural Significance:

The history of the Sijichun cultivar began in 1985, when farmer Zhang Wenhui (張文輝, Zhāng Wénhuī) from the Muzha district (木柵, Mùzhà) discovered among his Tieguanyin plantings several bushes with unusual characteristics. The plants were distinguished by exceptional vitality, rapid growth, and the ability to produce quality harvests practically year-round. Genetic analysis showed that this was a natural hybrid of the cultivars Hong Xin Wai Wei Tao (紅心歪尾桃, hóng xīn wāi wěi táo) and Qing Xin (青心, qīng xīn).

Initially, the cultivar received the name Liu Ji Xiang (六季香, liùjì xiāng) — “Aroma of Six Seasons,” reflecting its unique ability to yield up to six harvests per year. However, in the process of commercialization, the more poetic name Sijichun — “Spring of Four Seasons” — became established, emphasizing the freshness and floral nature of the aroma regardless of harvest season.

The production technology for “Red Pearl” emerged as a creative reinterpretation of traditional methods. After the success of red oolongs from Taitung (臺東紅烏龍, Táidōng hóng wūlóng), introduced in 2008, tea masters of Mingjian adapted the deep oxidation technology for local raw material. The combination of the floral character typical of Sijichun with honey-fruit notes arising from heavy fermentation created a unique flavor profile that quickly gained popularity in both domestic and international markets.

1. Classification and Origin:

Sijichun “Red Pearl” represents a unique example of Taiwanese tea artistry, belonging to the category of heavily oxidized oolongs (烏龍茶, wūlóng chá). By degree of fermentation (80-90%), this tea occupies a borderline position between traditional oolongs and red teas, which allows it to be classified as “red oolong” (紅烏龍, hóng wūlóng). This relatively new category emerged in Taiwan in the early 21st century as a response to growing demand for teas with rich, sweet flavor and minimal astringency.

Geographically, the tea originates from Nantou County (南投縣, Nántóu Xiàn), Mingjian Township (名間鄉, Míngjiān Xiāng), located in the central-western part of Taiwan. Mingjian is known as the largest tea-producing area of the island by area, where more than 90% of suitable land is devoted to tea plantations. The Sijichun cultivar (四季春, sìjì chūn), from which “Red Pearl” is produced, is grown at altitudes of 200-500 meters above sea level, which classifies it as a low-mountain tea. Despite the relatively low elevation of the plantations, the unique combination of red clay soils, subtropical climate, and the skill of local tea growers allows for the production of raw material of exceptional quality.

14. Varieties and Grades of Si Ji Chun:

By harvest season:

Spring tea (春茶, chūnchá, March–April): One bud and one leaf, pronounced gardenia aroma, fresh and bright taste. Considered the best season.
Winter tea (冬茶, dōngchá, November–December): Thicker leaf, increased polysaccharide content, “cold” aromatics and cane sugar sweetness. Second most valuable season.
Summer and autumn harvests: Used predominantly for commercial batches and tea beverages. Simpler taste, higher astringency.

By grade:

Special grade (特級, tèjí): Proportion of one bud + two leaves ≥ 95%. Dense granules, color — dark green with sandy tint. Gardenia aroma — powerful, long-lasting, penetrating. Price from 600 yuan per jin.
First grade (一級, yī jí): Predominantly one bud + two leaves. Clean aroma, honey-yellow, clear liquor.
Second grade (二級, èr jí): Mixed harvest including summer and autumn leaves. Clean taste but less complex, lower resistance to infusions.

In conclusion:

Si Ji Chun is a paradoxical tea: one of the simplest and most accessible Taiwanese oolongs, it nevertheless possesses a surprisingly expressive and memorable character. Its gardenia aroma — bright, cheerful, almost audacious — is impossible to confuse with anything else, and it is precisely this “floral directness” that has brought it the love of millions, from Taiwanese street tea houses to European tea boutiques. For those just beginning to explore Taiwanese oolongs, Si Ji Chun is the ideal entry point: it is simple to brew, forgiving of mistakes, magnificent in cold-brew format, and honestly demonstrates what Taiwanese oolong is. And for experienced tea lovers, a good spring batch of Si Ji Chun from Mingjian is a reminder that tea character is determined not only by plantation altitude and price, but by the successful combination of cultivar, terroir, and craftsmanship — that magical coincidence which the Taiwanese poetically called “eternal spring.”