Needle shaping (li tiao)
Shaking fixed leaf along heated parallel grooves until each piece straightens into a needle, rather than twisting it into a curl.
The categories this step defines
In tea, processing is not a modifier applied to a category — it is what creates the category. These are the types that exist because this step exists.
- Green tea — Kill-green (fixation) applied before meaningful oxidation can develop.
What it is
A li tiao machine is a bank of long heated troughs on a reciprocating frame. Fixed leaf is dropped in and the frame throws it forward and back so each piece is repeatedly tossed along the groove, and because the leaf is warm and losing moisture it sets in the extended position it keeps landing in. The result is the straight, tight, sometimes silvery-tipped needle of Xinyang Maojian, Nanjing Yuhua and a long list of regional greens, and it is a genuinely different operation from rolling: the leaf is being straightened and dried rather than twisted and ruptured. That distinction shows in the cup, because a needle-shaped tea has had far fewer of its cells broken than a rolled one and gives up its material more gradually as a result.
Also transliterated as: li tiao, litiao.
What it does to the leaf
Repeatedly throws warm leaf along a heated groove so it extends and sets straight while losing moisture, shaping and part-drying in one operation with minimal cell rupture.
What it does to the cup
Gives a clean, slow-building, low-astringency cup, because relatively little cell content has been brought to the leaf surface for immediate extraction.
Variants that matter
Ways this step is carried out that produce genuinely different results, rather than regional names for the same thing.
- Hand li tiao
- The same motion performed in a heated pan with the fingers held apart like a comb. Slower, and the origin of the machine’s design.
- Li tiao with pressure
- A weighted bar rides in the groove to press the leaf as it travels, giving a tighter, denser needle at the cost of some downy tip.
Where this gets misdescribed
Straight needle-shaped teas are often assumed to be bud-only picks, since the shape resembles an unopened bud. Shape is set by the machine, not by the plucking standard: leafy material shaped in a li tiao trough comes out just as straight, and the way to check is to unroll the wet leaf rather than to look at the dry.
Other steps at the Rolling and shaping stage
- Blending to a standard — Combining lots so that a named tea tastes the same in March and in October, which is a manufacturing step performed on finished tea and not a compromise applied to it afterwards.
- Cloth-ball rolling — Wrapping leaf tightly in cloth and repeatedly kneading and unwrapping it until it forms tight spheres.
- CTC (crush, tear, curl) — Leaf passed through counter-rotating toothed rollers that cut it into small uniform granules.
- Curling and down-raising (cuo tuan xian hao) — Rubbing warm leaf between the palms into loose balls and breaking them apart repeatedly, which curls the leaf into spirals and lifts its down to the surface.
- De-stemming and de-veining — Separating stem and leaf vein from the leaf blade after drying, usually by air separation.
- Flat shaping — Pressing leaf flat against the side of a heated wok by hand during pan-firing.
- Orthodox processing — The older manufacturing route, in which leaf is twisted and rolled rather than cut, so it survives largely intact.
- Pearl forming (chao gan cheng yuan) — Working rolled leaf against the wall of a heated pan through successive pans until each piece closes into a hard sphere, drying and shaping in the same operation.
- Refining (shiage) — The second factory. Japanese green tea leaves the producer as aracha, an unfinished trade good, and is cut, sorted and separated elsewhere into the several named teas one intake contains.
- Repeat rolling and roll-breaking (fu rou) — Rolling is done in two or three passes with the compacted lumps broken up and sifted between them, because one long pass tightens the outside of a ball of leaf and never reaches the middle.
- Rolling and shaping — Working the leaf to rupture its cells and give it a form that governs how it later brews.
- Rotorvane maceration — A screw press with internal vanes that macerates withered leaf continuously, sitting between orthodox rolling and CTC rather than belonging to either.
- Sorting and grading — Separating dried tea by particle size, density and colour into the grades it is sold as — a sorting operation, not a quality judgement.
- Stalk picking (jian ti) — Hand removal of stalk and yellow leaf from finished oolong, done between roasts rather than at the end — which is why it is an ordering fact and not a tidying-up one.
- Stone milling — Grinding de-stemmed tencha into powder between slow-turning granite wheels.
- Strip rolling — Rolling leaf into long twisted strips rather than compressing it into balls.
Sources
- TeaHQ editorial synthesis — TeaHQ
This page is TeaHQ’s own synthesis of well-attested production practice. No external technical document stands behind it, so it describes what producers do rather than asserting measured process parameters.
Written comparisons
Where TeaHQ has set this step against something it is routinely confused with, and argued the differences out in full.
- Needle shaping vs strip rolling — Two ways to produce a long extended leaf, with opposite consequences for extraction. Needle shaping straightens the leaf against a heated groove with minimal cell rupture; strip rolling twists it lengthwise and ruptures cells as it goes.