From Bud to Cake: How Pu'er Tea is Made
Pu'er is not made in a factory. It is born in the hands of a picker, passes through the fire of a wok, dries in the Yunnan sun, and takes its form under the press, when it is not simply left loose. Every step counts, every action determines what the tea will become in the cup. Here is the complete journey, from bud to cake.
Picking: it all starts by hand
Quality Pu'er starts with fine plucking. This is referred to as yi ya yi ye (一芽一叶, one bud and one leaf) or yi ya er ye (一芽二叶, one bud and two leaves). The bud, still tightly closed and covered with a fine white down, is the most concentrated part of the plant, where aromatic compounds, amino acids, and pectin are located, which will give the tea its richness.
Picking is done in the morning, once the dew has evaporated, to avoid excess moisture in the leaf. On ancient trees, it is done entirely by hand, sometimes by climbing the tree, on slopes where no machine can access. The gesture is precise: the bud and adjacent leaves are grasped with a supple movement that breaks the stem without crushing the material. A damaged leaf during harvest will oxidize poorly, and the entire tea will suffer as a result.
Withering: letting the leaf breathe
As soon as they are picked, the leaves are spread in a thin layer on bamboo trays, in the shade or in an airy space. This is called withering, or wei diao (萌凋) in Chinese. The leaves lose some of their moisture, becoming supple and relaxed. This is not yet a deep chemical transformation: it is a conditioning process. The leaf is preparing to receive the heat that will follow.
The duration varies depending on the weather, temperature, and ambient humidity. Two hours is a common duration, but it is the producer's eye and hand that decide, not the clock. The leaves must be flexible without being limp, still a little lively without being stiff.
Sha Qing: fixing the leaf in the wok
This is the most decisive step. Sha Qing (杀青), which translates as "killing the green" or "fixation," consists of briefly heating the leaves in a large cast iron wok, heated over a wood fire, at a temperature of about 200 °C. The producer turns the leaves with bare hands in the burning wok, with a regular rhythm that tolerates no approximation.
Nowadays, few producers still use traditional woks; many use machines that heat the leaves for a brief pass.
This critical step must be performed by hand to obtain the best Pu'er.
What sha qing does is deactivate most of the enzymes responsible for oxidation in the leaf—the very ones that turn green tea into black tea if left unchecked. But—and this is the subtlety unique to Pu'er—sha qing does not destroy all the enzymes. It intentionally leaves a small fraction active. These residual enzymes will allow Pu'er to continue to evolve over time, year after year. This is the fundamental difference between Pu'er and ordinary green tea: green tea is frozen in time, Pu'er is designed to transcend it.
The control of temperature and duration is entirely manual. Too short, the enzymes remain too active and the tea will oxidize too quickly. Too long or too hot, the enzymes are destroyed and the tea will never age. This is where the producer's expertise makes the difference between a Pu'er that will last decades and a stillborn tea.
Rolling: releasing the aromas
After sha qing, the leaves are still warm. They are allowed to cool briefly, "the liang qing," to equalize their water content, and then comes the rolling: rou nian (搢捲). The leaves are rolled and pressed, traditionally by hand on a flat surface, to break the plant cells without tearing the leaf. This action releases the internal juices—polyphenols, amino acids, essential oils—which will migrate to the surface of the leaf and give the tea its aromatic depth during infusion.
The intensity of rolling depends on the desired result. Light rolling produces a milder tea with more subtle aromas. Vigorous rolling yields a stronger tea, with a more pronounced bitterness and a fuller sweet aftertaste. It's a delicate balance that the producer adjusts according to the raw material and the character they want to impart to the tea.
Sun Drying: Time as an Ingredient
The rolled leaves are then spread out in the sun, on bamboo mats or clean tarpaulins, and dry for three to five hours depending on the sunlight. This is shai gan (晩干), sun drying, and it is perhaps the most underestimated step in the entire chain.
Why the sun instead of an electric dryer? Because sun drying is slower, more irregular, and less hot. It preserves the residual enzymes that sha qing deliberately left active, and it retains some moisture in the leaf, which will facilitate future fermentation. A sun-dried Pu'er can age for decades. A Pu'er dried at high temperatures in a machine is, in fact, a dead tea—stable, yes, but incapable of evolving.
This is where Yunnan's weather comes into play. Sunny spring days are ideal. If rain occurs during drying, the leaves must be brought inside, waited for, restarted, and the tea will no longer be quite the same. Sun drying is an act of patience and dependence on the sky. It is also one of the gestures that distinguish artisanal Pu'er from industrial Pu'er.
Maocha: The Raw Material
At this stage, we have maocha (毛茶), literally "raw tea." These are the leaves after plucking, withering, fixation, rolling, and sun drying. Maocha is already a drinkable tea—it can be brewed as is, and it is already good. But it is above all the starting point for everything that follows.
It is from maocha that the fundamental choice is made: to leave it as is to make a raw Pu'er (sheng), which will age naturally over the years, or to subject it to accelerated fermentation to make a fermented Pu'er (shou).
Pile Fermentation: The Path of Shou
Fermented Pu'er undergoes an additional step that the Chinese call wo dui (渥堆), or pile fermentation. The maocha is arranged in large piles in a workshop, humidified, and then covered with tarpaulins. Under the combined effect of heat, humidity, and microbial activity—fungi, yeasts, filamentous bacteria—the leaves undergo a profound transformation within a few weeks to a few months.
The producer regularly turns the piles to homogenize the fermentation, monitors the temperature at the heart of the pile (which can exceed 60 °C), and adjusts the watering. This is an empirical process, passed down from master to apprentice, requiring considerable experience. Too short a fermentation yields a tea that is still harsh; too long, a tea that is bland and lacking structure. The ideal window is narrow.
This technique was developed in the 1970s at the Kunming factory, to reproduce in a few months what the natural aging of raw Pu'er takes decades to achieve. The result is not identical—a shou is not an aged sheng—but it produces a tea of immediate roundness and sweetness that has made it popular throughout China, and then worldwide.
Compression: Giving the Tea its Shape
Pu'er can be consumed loose, but its most emblematic form is the compressed cake, the bing cha (饵茶). To form it, the maocha is placed in a cloth, briefly steamed to soften it, then compressed under a stone press—traditionally, hydraulic in modern workshops. The cake is then unmolded and left to dry slowly on shelves.
Compression is not a mere packaging gesture. It slows down the air exchange between the leaves and the outside, which alters the speed and nature of aging. A tightly compressed tea ages more slowly than a loosely pressed tea or a loose tea. To be compressed, the tea also undergoes an additional step: it is steamed to soften the leaves during pressing, so they don't break. This is why cakes survive decades better: compression protects the tea while allowing it to breathe, much like a good cork does for wine.
What our methods change
The steps we have just described are common to all Pu'er. What changes from one producer to another is the precision of each gesture, the quality of the raw material, and the small adjustments accumulated over the years. We modified some of our production methods more than twenty years ago, with our on-site team, to obtain cleaner results at each stage, but the principle remains the same: hands, a wok, sun, time.
No electric drying. No mechanical rolling. No additives. The tea you hold in your cup was made with three things: the leaf, heat, and time. That's all it takes. Advanced and precise techniques for fermentation, which are much longer, slower, and gentler, to obtain the best tea—a tea that is rounder, less earthy, less dusty.
Frequently Asked Questions
What is the difference between sha qing and roasting?
Sha qing (wok fixation) is a brief heating that partially deactivates the leaf's enzymes without destroying them entirely. Roasting, used for Chinese green tea or oolong tea, goes further and irreversibly stabilizes the leaf. This incomplete fixation allows Pu'er to continue evolving over time, fundamentally distinguishing it from all other teas.
Why is sun drying so important?
Sun drying (shai qing) preserves the enzymes and microorganisms naturally present on the leaf, which makes possible the slow fermentation that gives Pu'er its aging potential. Industrial high-temperature drying kills these elements and produces a tea that will no longer change. This is the difference between a living tea and a stagnant tea.
How long does it take to make Pu'er?
For raw Pu'er, the complete process from plucking to finished cake takes about three to five days. For fermented Pu'er, you need to add an average of 45 to 60 days—and 90 to 100 days in our case—of pile fermentation (wo dui) before sorting the leaves and eventually pressing. But in both cases, the tea is not truly "finished" when it leaves the workshop: it is time that perfects the work.
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