Quick Answer: What Is Cui Yu Oolong?
Cui Yu（翠玉，Cuìyù）oolong is tea made from the Taiwanese cultivar formally known as Taiwan Tea No 13. The cultivar was named in 1981 and is associated with an expressive floral character.
- Identity: The cultivar name identifies the plant material, rather than one mountain or garden.
- Processing: An oolong route develops the finished leaf through withering, handling, fixation, shaping and drying.
- Flavor: Floral descriptions offer a useful expectation, but processing and growing conditions still matter.
“Jade Oolong” is an English label worth checking against the stated cultivar. It is not sufficient information about a batch on its own.
A rolled green oolong can carry several kinds of information on its packet: the cultivar, the growing district and the finished style. Cui Yu belongs to the first of these. Keeping those categories separate helps explain both its recognizable floral reputation and the differences between teas sold under its name.
A Taiwanese Cultivar Rather Than One Mountain Origin
The breeder’s profile identifies Taiwan Tea No 13 as Cui Yu, a small-leaf cultivar suited to making bao zhong and oolong. It describes an upright plant with broad oval, dark green mature leaves and identifies central Taiwan as a suitable growing area.[1]
That botanical description does not mean that a photograph of processed leaf can authenticate a packet. Rolling and other manufacturing operations change what the leaf looks like. The useful connection is between the cultivar stated by the producer and the material actually grown.
Unlike a place-based tea name, Cui Yu does not designate one particular mountain. A regional label and a cultivar label answer different questions. A packet needs its own origin information rather than borrowing a district from a general description of the plant.
The distinction is explored further in Chinese tea cultivars: plant identity and manufacturing category should remain separate even when both appear in the same tea name.
Why Taiwan Tea No 13 and Line 2029 Matter
Breeding records distinguish Cui Yu from Jin Xuan（金萱，Jīnxuān）and from the unnamed experimental line 2028.[2] Their nearby numbers are easy to confuse, but refer to different selections.
| Name or line | Identifier | Distinción importante |
|---|---|---|
| Cui Yu | Taiwan Tea No 13; former line 2029 | A named cultivar |
| Jin Xuan | Taiwan Tea No 12; former line 2027 | A different named cultivar |
| Experimental line 2028 | No cultivar name granted in that naming group | Not an alternative number for Cui Yu |
The formal naming in 1981 records a stage in a longer selection program. It should not be rewritten as a claim that the entire cross, evaluation and commercial development happened within that year.
Shared participation in a breeding program also does not make two cultivars the same plant. For a label comparison, the formal cultivar number is more useful than the loose description “one of the Taiwanese jade teas.”
How Cui Yu Becomes Oolong
In the Taiwanese oolong route, fresh leaves undergo withering and controlled resting and agitation before fixation. Handling manages moisture and contributes to oxidation; fixation then uses heat to reduce enzyme activity. Rolling and drying follow, with further shaping or roasting depending on the intended style.[3]
This explains why the cultivar is not a complete finished-tea specification. A rolled shape, a lighter aromatic presentation and a stronger roast describe manufacturing choices. They cannot all be inferred from the words Cui Yu.
Tea rolling explains the shaping operation, while roasting concerns a different set of finishing decisions. Neither should be confused with adding flowers to scent the tea.
Floral Character and the Limits of a Cultivar Description
A cultural record describes Cui Yu’s aroma through comparisons with wild ginger lily and betel-nut flowers. It also records cultivation in Mingjian and Zhushan in Nantou, and Dongshan in Yilan.[4] These documented places illustrate distribution, rather than establish the origin of every available product.
Flower names are sensory comparisons. They do not, by themselves, say that petals, extracts or fragrance were added. Read tea scenting separately if you want to understand that manufacturing operation.
A broad cultivar description is an expectation to test against the actual cup. It is not a promise that every harvest will have the same intensity, body or aftertaste. Keep aroma, taste and mouthfeel as separate notes rather than calling all three “floral.”
The aroma vocabulary guide can help you describe what you notice without requiring an exact flower identification. Disagreement about whether a note resembles one blossom or another does not establish a different cultivar.
Reading a Cui Yu or Jade Oolong Label
Look for the cultivar, growing location, harvest information and finished processing description. Ask whether “Jade” identifies Taiwan Tea No 13 or is being used more broadly as an English style description. A clear answer is more useful than assuming that the word proves either identity or quality.
An official Yilan production account documents Taiwan Tea Nos 12 and 13 among the small-leaf cultivars used for fully oxidized black tea.[5] The plant remains Cui Yu under that different route. When comparing two oolongs, record roast and other processing differences before attributing every contrast to the cultivar.
Treat the seller’s tasting note as a description of that product, then compare it with your observations and its production information.
FAQs About Cui Yu Oolong
Is Cui Yu the same cultivar as Jin Xuan?
No. They are Taiwan Tea No 13 and No 12 respectively, with different breeding identifiers.
Is every tea called Jade Oolong made from Cui Yu?
Do not assume so. Check the stated cultivar rather than relying on the English marketing name.
Are flowers necessarily added to Cui Yu oolong?
No. A floral aroma description does not establish added flowers or scenting.
Can Cui Yu leaves be made into black tea?
Yes. Official production accounts document that use of Taiwan Tea No 13.
Fuentes
[1] Tea and Beverage Research Station. Taiwan Tea No 13 cultivar profile
[2] Chih-Yi Hu, Tea and Beverage Research Station. Clarifying the identity of experimental line 2028
[3] Tea and Beverage Research Station. Tea classification and processing
[4] Chih-Yi Hu, National Taiwan Craft Research and Development Institute. Taiwanese tea cultivars: Taiwan Tea No 13
[5] Tea and Beverage Research Station. Yilan Suxin black tea grading and production account