Sheng and shou are both puerh: tea from Yunnan's big-leaf trees, made the same way up to the point where the leaf is dried. Sheng (raw) is then pressed and left to change slowly over years. Shou (ripe) is first piled damp and fermented for six to eight weeks, which takes it somewhere sheng never goes. They taste different, age differently, and are worth treating as two teas that share a starting point.
What is sheng puerh?
Sheng is puerh made the older way. The leaf is picked, withered, fired briefly in a wok, rolled, and dried in the sun. That dried leaf is called maocha. It is then steamed and pressed into cakes or bricks, or sold loose. Young sheng is bright gold in the cup, floral, often bitter, and drying on the gums if you brew it hard.
The firing is the important step. Puerh is fired at a lower heat and for less time than most teas. That stops the leaf turning red but leaves some of its own enzymes, and the microbes living on it, still able to work. Sun-drying helps those microbes come back. This is why sheng keeps changing in storage. Over ten, twenty, thirty years it darkens toward amber, and the bitterness turns to wood, dried fruit, camphor and herbs.
What is shou puerh?
Shou starts as the same maocha. Instead of going straight to the press, it is piled about a metre deep, sprayed with water, usually covered, and turned regularly while microbes ferment it. The Chinese term is wo dui, wet piling. Heat builds inside the pile, which is why shou is sometimes called cooked puerh, though nothing is cooked.
A full fermentation takes 45 to 60 days. The first stage is deep and wet. In the second, the piles are spread thinner and drier while yeasts and moulds take over. Shou for cakes is pressed while still slightly damp, because fully dried shou leaf is tight and twisted and will not hold together without heavy steaming. From pile to finished cake takes about three months. The result is dark, thick, earthy, and very hard to make bitter.
How do sheng and shou taste different?
Side by side, they are not easily confused.
- Young sheng: gold to pale amber. Floral and fruity, bitter at the front, sweet in the aftertaste. Lively and sometimes harsh.
- Aged sheng: amber to deep red. Wood, dried fruit, camphor, herbs. Most of the bitterness has gone, but the tea still has lift and layers.
- Shou: dark brown to nearly black, and thick. Earth, leather, dates, a creamy weight. Little bitterness, even when overbrewed.
New shou often carries a smell from the pile, sometimes described as musty or fishy. It usually softens after a year or two of airing. If it has not faded after several years, the tea was piled badly.
Is the difference oxidation or fermentation?
Both, depending on the tea. Oxidation is the leaf's own chemistry meeting air, the way a cut apple browns. Fermentation is microbes at work, closer to bread rising. We teach it in one line: red tea is oxidised; liu bao and shou are fermented; sheng does both, slowly.
That last clause explains sheng. Shou is fermented quickly and on purpose, in a pile. Sheng oxidises and ferments in its wrapper over decades, at whatever pace its storage allows. Humid storage moves it faster. Dry storage keeps it brighter for longer. The same sheng stored in Kunming and in Hong Kong will be two different teas after fifteen years.
When was shou puerh invented?
Shou is young. Yunnan licensed commercial production in 1973, after experimental batches from the mid-1960s. Older books give 1972, 1973 or 1974; 1973 is the year of the licence. The goal was to give buyers the dark, mellow character of aged puerh without waiting decades for it.
The factories borrowed wet piling from dark tea makers elsewhere in southern China, including the liu bao producers of Guangxi, and adapted it to Yunnan's bigger leaf and different microbes. Accounts disagree on the details, including where the technique was learned and which of the Kunming, Xiaguan and Menghai factories got it working first. Menghai's shou became the flavour most drinkers think of as classic.
Yunnan's hill peoples had their own older ways of darkening puerh, by roasting it, burying it or packing it into bamboo. Those are not what anyone means by shou today. For more on the early factories, read our older post on the history of shou puerh. For how shou compares with its Guangxi cousin, see liu bao vs shou puerh.
Does sheng turn into shou if you age it long enough?
No. Very old sheng can look dark in the cup, but it keeps a clarity and a layered, moving character that shou does not have. Piling breaks the leaf down fast and evenly. Slow ageing leaves more of the original leaf in place, and more of where it grew.
The two are judged on different terms. A forty-year-old sheng is not a better shou. A good shou is not a shortcut to aged sheng, even though imitating aged sheng is the reason shou exists. Each is good or poor on its own scale.
Which one should you buy first?
Start with shou if you want a forgiving daily tea. It takes boiling water, handles long infusions, and is hard to ruin. Young shou is also relatively affordable, because no one has paid to store it for decades. Our 2017 Lao Shu is a good place to start, and older shou such as the 1980s Menghai 8592 sits in the shou puerh collection.
Start with sheng if you want to learn how a tea changes. Buy a young cake and drink it over several years. Brew it lighter than shou: fewer leaves, shorter infusions, and pour off quickly if it turns harsh. The 2023 Jingmai is a young sheng from old trees, and the sheng puerh collection runs back to a 1990s private order. Aged sheng is where the price climbs, because someone has stored it for decades and every year of that shows in the cost.
Brew one of each on the same afternoon, in the same pot, with the same weight of leaf. You will know the difference from the first cup. Questions about a specific cake? Write to us.