---
title: "lǜchá"
url: https://thetea.app/article/lucha
lang: en
updated: 2026-07-21
source: THE TEA — encyclopedia of Chinese tea (https://thetea.app)
---
# lǜchá (绿茶)

Green tea is not a single beverage but an entire family united by a common technological logic: stop oxidation at the very beginning and preserve the "greenness" of the leaf. The key to this family is the operation *shā qīng* (杀青), "killing the green," and the heating method by which it is performed.

## What makes tea green

All green teas — from flat *lóng jǐng* (龙井) to rolled *zhū chá* (珠茶) — pass through the same framework:

**鲜叶 (摊放) → 杀青 → 揉捻 (做形) → 干燥**

That is: fresh leaf, light spreading-withering, kill-green, rolling-shaping, and drying. The differences between dozens of famous varieties lie not in a change of this framework, but in the nuances of two of its links — *shā qīng* (type of heating) and *zuò xíng* (做形, giving shape).

The fundamental difference between the green class and the red class (black according to Western nomenclature) lies in *when* and *what* the enzyme does. In red tea, rolling (*róu niǎn*, 揉捻) initiates oxidation. In green tea, everything is reversed: high-temperature *shā qīng* is performed **before** oxidation has a chance to begin, and the enzyme is inactivated.

## Chemistry: why the leaf stays green

The central figure here is polyphenol oxidase (多酚氧化酶, PPO). It is precisely this enzyme that, in the presence of oxygen, oxidizes catechins, turning a green leaf into a red one. The task of *shā qīng* is to rapidly raise the leaf temperature and **inactivate PPO before the start of oxidation**. Oxidation simply does not start.

A consequence is the preservation of a whole set of substances that form the profile of green tea:

- **茶多酚** (tea polyphenols, catechins, including EGCG) — responsible for bitterness, astringency, and the overall structure of the infusion;
- **叶绿素** (chlorophyll) — the green color of the leaf and infusion;
- **茶氨酸** (theanine) — umami and sweetness;
- vitamin C.

The flavor balance of green tea rests on three axes: *xiān shuǎng* (鲜爽, fresh liveliness from theanine and amino acids — higher in early and shaded raw material), *kǔ sè* (苦涩, bitterness-astringency from catechins — higher in summer harvests), and *huí gān* (回甘, returning sweetness).

Hence the main characteristic of storage. Green tea does **not "age" nobly**, unlike *pǔ ěr* or white tea. It is precisely the fresh leaf that is valued — *xīn chá* (新茶), harvests of *míng qián* (明前, before Qingming) and *yǔ qián* (雨前, before 谷雨, Grain Rain). It should be stored in cold conditions, without access to light and extraneous odors.

## Withering and drying: the frame around kill-green

Before reaching *shā qīng*, the leaf undergoes **摊放** (*tān fàng*) — spreading for a light loss of moisture and accumulation of aroma. This is softer and shorter than the deep withering (*wěi diāo*, 萎凋) of red tea: the task is not to allow oxidation to proceed, but only to prepare the leaf.

The chain is closed by **干燥** (drying) — *chǎo gān* (炒干, pan-roasting), *hōng gān* (烘干, oven-drying), or *shài gān* (晒干, sun-drying). Drying fixes the shape and completes the aroma: pan-roasting develops the chestnut note *lì xiāng* (栗香) and "wok heat" *guō qì* (锅气), while oven-drying yields a clean floral-herbaceous *qīng xiāng* (清香).

## The 杀青 axis: five heating modes

It is the method of performing *shā qīng* that determines the aromatic "accent" of the tea. This is the main classification axis of the green class.

**炒青 (*chǎo qīng*) — pan-fired.** The leaf is heated in a red-hot wok or drum. It gives a characteristic *guō qì* (锅气) and chestnut *lì xiāng*. This is the "fried" school, to which most famous flat and rolled varieties belong.

**烘青 (*hōng qīng*) — oven-baked.** Heating by hot air. The aroma is purer and lighter — *qīng xiāng* (清香). It is precisely *hōng qīng lǜ chá* that serves as the base for jasmine and other scented teas: the loose oven-baked leaf structure readily accepts floral aroma during *xūn zhì* (窨制).

**[晒青](https://thetea.app/article/shai-qing) (*shài qīng*) — solar.** Fixation and drying proceed under the sun. This mode gives *shài qīng máo chá* (晒青毛茶) — the raw material from which sheng pu-erh (*pǔ ěr shēng*) is made. That is, solar green is a bridge to a completely different class.

**蒸青 (*zhēng qīng*) — steam.** The leaf is treated with steam. It preserves a particularly bright greenness and gives a seaweed note *hǎi tái xiāng* (海苔香, "seaweed"). In China, *ēn shī yù lù* ([恩施玉露](https://thetea.app/article/enshi-yulu)) belongs to this school; this same mode forms the basis of Japanese sencha (煎茶).

**半烘炒 (*bàn hōng chǎo*) — combined.** A combination of oven and wok heating, giving an intermediate profile between pure *qīng xiāng* and pronounced *guō qì*.

## The shape axis: what 做形 does

If *shā qīng* sets the aroma, then *zuò xíng* (做形) sets the appearance — the second load-bearing axis of the class. Several examples of techniques and their results:

- *huī guō* (辉锅) → flat shape (扁), as in *lóng jǐng*;
- *cuō tuán* (搓团) → spiral (螺), as in *[bì luó chūn](https://thetea.app/article/biluochun)* ([碧螺春](https://thetea.app/article/biluochun));
- *lǐ tiáo* (理条) → needle (针);
- *lā lǎo huǒ* (拉老火) → flake-platelet (片), as in *guā piàn* (瓜片).

For some particularly tender varieties — for example, *tài píng hóu kuí* ([太平猴魁](https://thetea.app/article/taiping-hou-kui)) — shaping is minimal, with the leaf preserved almost in its natural state.

The final palette of green tea shapes: flat / spiral / needle-like / orchid-like (兰花) / flake / "flower" (朵) / round pellet-pearl (颗粒珠) / "eyebrow" (眉).

## Links to other classes

Green tea is a nodal class of Chinese tea taxonomy, and many neighboring families grow directly out of it:

- **晒青毛茶** (solar green) → raw material for sheng pu-erh;
- **烘青绿茶** (oven-baked green) → base for jasmine and other scented teas via *xūn zhì*;
- **蒸青** (steam) → technological bridge to Japanese green tea;
- **黄茶** (yellow tea) = green plus an additional step *mèn huáng* (闷黄, "smothering to yellowness").

Understanding these connections helps one see that the boundary between classes runs not along the plant, but along the technology.

## How to distinguish in practice

To "read" a green tea, it is enough to keep the formula in mind: **aroma = variety (品种) × 杀青 × harvest season × terroir**.

- If a roasted, chestnut tone with "wok heat" is audible in the dry leaf and infusion — you have *chǎo qīng* before you.
- A pure, light herbaceous-floral *qīng xiāng* without burnt notes points to *hōng qīng* (and often to a tea base for scenting).
- A bright, almost marine algae note is a sign of *zhēng qīng*, the steam school.
- A rough, "solar" tone in the dry raw material may speak of *shài qīng* — a potential ancestor of pu-erh.

Freshness is assessed by the liveliness of the green color of the infusion and the expression of *xiān shuǎng*: a dull color and a flat, "stewed" taste are a sign that the tea has lost its youth. Remember: for the green class, age is a drawback, not a virtue.

*Related: shape axes (做形), aroma wheel, Japanese green tea, yellow tea, and pu-erh.*