měng hǎi wèi shú bǐng

Menghai Wei Shu Bing (勐海味熟饼, Měnghǎi wèi shú bǐng) is not a single commercial grade but a collective name for ripe (shu) pu-erh pressed into cake form that carries the characteristic “Menghai flavour” (勐海味, Měnghǎi wèi). The style encompasses teas fermented from Yunnan large-leaf material in Menghai County — the historical centre of industrial shu pu-erh production. The benchmark for this profile is traditionally considered to be the output of the Menghai Tea Factory (勐海茶厂, Měnghǎi cháchǎng), above all the recipe cakes of the 7572 series. “Menghai flavour” is prized for its soft, dense and clean fermentation note, which many connoisseurs link to the stable microbial environment of the local piling workshops. In the tea culture of Yunnan, this phrase has long since become an almost technical term denoting the “pedigree” and quality of ripe pu-erh.

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1. Classification and Origin:

• Type: ripe (post-fermented) pu-erh — 熟茶 (shú chá)
• Category: pu-erh (普洱茶, pǔ’ěr chá)
• Form: cake (饼茶, bǐngchá), classic weight 357 g
• Region of origin: Menghai County (勐海县, Měnghǎi xiàn), Xishuangbanna Dai Autonomous Prefecture (西双版纳傣族自治州, Xīshuāngbǎnnà Dǎizú zìzhìzhōu), Yunnan Province (云南省, Yúnnán shěng)
• Raw material: large-leaf variety of the tea plant Camellia sinensis var. assamica (大叶种, dàyèzhǒng)

The term “Menghai wei” describes not so much geography as a flavour-aromatic profile. Strictly speaking, what makes a tea “Menghai” is not only the origin of the leaf but also the place of post-fermentation: the microbial community that has formed in the workshops of Menghai over decades. For this reason, cakes made from Menghai raw material but fermented in other districts appear on the market — their belonging to the style is considered debatable.

According to the national standard GB/T 22111-2008 “Product of geographical indication. Pu-erh” (地理标志产品 普洱茶), only tea made from Yunnan large-leaf sun-dried raw material and produced within the designated geographical zone may be called pu-erh; shu pu-erh is defined as tea that has undergone artificial post-fermentation by the method of wet piling (渥堆, wòduī).

2. History and Cultural Significance:

• Key technology: industrial wet piling (渥堆, wòduī) for accelerated fermentation, perfected in 1973–1975
• Key enterprise: Menghai Tea Factory, founded in 1940 (originally as Fohai Experimental Tea Factory, 佛海实验茶厂; Fohai being the old name of Menghai)
• Benchmark recipe: 7572 — the classic shu cake that became the “tuning fork” of the style

In the early 1970s, Yunnan enterprises were seeking a way to accelerate the ageing of pu-erh to meet the demands of the Hong Kong and Guangdong markets, where a “well-aged” taste was valued. The wet-piling technology was developed in Kunming and introduced in Menghai; the output of the latter quickly acquired a recognisable character that became established as “Menghai flavour”.

It is useful to understand the factory numbering of recipes. In the four-digit code, the first two digits indicate the year the recipe was developed, the third the average leaf grade, and the fourth the factory number. In the industry numbering, Kunming received the digit 1, Menghai 2, Xiaguan 3, and the factory in Pu’er (Simao) 4. Thus, the code 7572 reads as “1975 recipe, average grade 7, Menghai factory”. Since 2004, the factory has been part of a private group, and its flagship brand is Dayi (大益, Dàyì).

3. Botanical Description and Raw Material:

• Botanical taxon: Camellia sinensis var. assamica (大叶种, dàyèzhǒng)
• Plant form: from pruned bushes to tall-stemmed trees, including old-growth plantings
• Leaf: large, leathery, with pronounced venation and noticeable bud down
• Semi-finished product: maocha (毛茶, máochá) — a rough green tea of sun drying

The large-leaf assamica variety is characterised by a high content of polyphenols and extractive substances, which makes it suitable for deep fermentation: it is precisely the reserve of “raw power” that allows shu pu-erh to gain density and sweetness. For Menghai shu cakes, including recipe ones, a blend of leaf of different grades is usually used, which gives a balance of body and aroma.

4. Terroir and Cultivation Features:

• Coordinates of the county: approximately 21°28′–22°28′ north latitude and 99°56′–100°41′ east longitude
• Altitudes: from around 535 m in river valleys to approximately 2400 m on peaks; tea gardens predominantly at 1200–1800 m
• Climate: subtropical monsoon, average annual temperature around 18–19 °C, precipitation around 1300–1400 mm per year
• Famous mountains: Bulangshan (布朗山, Bùlǎng shān), Nannuoshan (南糯山, Nánnuò shān), Bada (巴达, Bādá), Mengsong (勐宋, Měngsòng)

Menghai is one of the classic pu-erh territories with an abundance of old tea forests and a diversity of micro-zones. For sheng pu-erh, terroir decides almost everything, whereas in the case of shu, the contribution of fermentation is comparable to that of the raw material: the warm and humid local climate, as well as the quality of the water, create a favourable environment for the microbiota of piling. It is precisely this combination of “raw material plus fermentation environment” that the expression “Menghai flavour” implies.

5. Production Technology:

• Stage 1 — raw material: picking → withering → fixation of green leaf (杀青, shāqīng) → rolling (揉捻, róuniǎn) → sun drying (晒干, shàigān) → maocha
• Stage 2 — post-fermentation: wet piling (渥堆, wòduī) lasting around 40–60 days with periodic turning of the piles (翻堆, fānduī)
• Stage 3 — pressing: sorting, steaming (蒸压, zhēngyā), forming the cake, slow drying

The key process is wet piling. Maocha is gathered into large piles, moistened and covered; under the action of microorganisms (among which the black aspergillus, 黑曲霉, hēiqūméi, plays a significant role) and the heat associated with them, oxidative-microbiological transformations are launched. The temperature inside the pile can rise to 50–65 °C, so the mass is regularly turned for uniformity. After fermentation is complete, the tea is dried, allowed to rest, sorted and pressed. It is believed that it is precisely the microflora established in the Menghai workshops and the local water that give the finished tea a clean, “pedigreed” note that is difficult to reproduce exactly in another locality.

6. Organoleptic Characteristics:

• Dry cake: dense, dark brown with a burgundy hue, often with golden tips
• Infusion: from dark red to chestnut-red, transparent, “wine-like”
• Aroma: warm, with notes of dried fruit (jujube, prune), seasoned wood, sometimes camphor and “sticky rice”; clean, without mustiness
• Taste: thick and smooth, with a sensation of oily density (稠, chóu) and a pronounced sweet return (回甘, huígān)
• Spent leaf: dark brown, even, reasonably elastic

A marker of the style is the combination of a deep, “candy-like” sweetness on the return (often compared to rock sugar, 冰糖, bīngtáng) and a complete absence of the sharp odour of fresh fermentation (堆味, duīwèi). Young shu can give off this “pile” note; in a quality Menghai cake it is either weakly expressed from the start or disappears after a couple of years of rest.

7. Chemical Composition:

• Tea polyphenols (茶多酚, chá duōfēn): significantly reduced during fermentation, roughly to 10–15%
• Theabrownin pigments (茶褐素, chá hèsù): increase, imparting the dark colour of the infusion and softness of taste
• Caffeine (咖啡碱, kāfēijiǎn): preserved, around 3–4%
• Soluble sugars and polysaccharides: increase, giving roundness and sweetness
• Amino acids: partially transformed, reducing the initial freshness

Exact values depend greatly on the original raw material and the degree of fermentation, so the figures given should be understood as guidelines rather than as a norm. The general pattern is stable: the deeper the post-fermentation, the lower the astringency and the higher the proportion of dark pigments and soluble carbohydrates.

8. Health Properties:

• Warm nature: unlike the “cooling” sheng pu-erh, shu is traditionally classified as a “warming” tea
• Gentleness to the stomach: the fermented infusion is considered gentle; it is often drunk after meals
• Digestive support: in Chinese tradition it is associated with helping to digest fatty food (消食, xiāoshí)

Modern studies of pu-erh (influence on lipid metabolism, gut microbiota, etc.) continue and have not yet yielded definitive conclusions, so tea should be regarded as a beverage and not as a therapeutic remedy. In case of caffeine sensitivity, it is worth bearing in mind that the alkaloid content in shu pu-erh remains noticeable.

9. Brewing:

• Vessel: gaiwan (盖碗, gàiwǎn) or a Yixing clay teapot (紫砂壶, zǐshā hú) that holds heat well
• Water: soft, freshly boiled
• Temperature: 95–100 °C, full boiling water
• Ratio: approximately 7–8 g per 100–150 ml
• Rinse: 1–2 quick infusions (洗茶, xǐchá) to “awaken” the leaf and remove dust
• Infusions: first ones 5–10 seconds, thereafter gradually increasing the time; a good cake sustains 10 or more infusions

Shu pu-erh reveals itself with very hot water: it draws out density and sweetness and prevents the infusion from turning “weak”. It is better to break the cake with a pu-erh knife along the layers so as to crumble the leaf less. The last, already weakened infusions can be boiled on the stove (煮茶, zhǔchá) — thus extracting residual sweetness.

10. Storage:

• Conditions: dry, clean, ventilated premises away from extraneous odours and direct light
• Humidity: moderate; excess provokes mould, excessive dryness retards ageing
• Container: original paper wrapper and cardboard, without hermetic packaging

Ripe pu-erh continues to evolve gently with ageing: residual fermentation notes smooth out, the taste becomes cleaner and deeper. Many connoisseurs deliberately age a fresh shu cake for several years so that the “Menghai flavour” unfolds in full measure. Tea should be kept separate from spices, coffee and perfume — the leaf greedily absorbs odours.

11. Price and Counterfeits:

• Range: very wide — from inexpensive factory cakes of the middle segment to high prices for aged and branded items (for example, old Dayi)
• Main risk: “Menghai flavour” as a marketing label applied to teas without a real connection to the region and profile
• Brand counterfeits: Dayi (大益) is actively copied; packaging, codes and holograms help, but the decisive criterion is organoleptics

The honest picture is this: the expression itself is used freely, so the inscription on the wrapper guarantees nothing. Signs of a weak or false “Menghai” cake — cloudy infusion, watery thin taste, heavy smell of a fresh pile, mustiness or mouldy tone, absence of a sweet return. Quality tea yields a transparent wine-red infusion, dense “oily” body and clean sweet aftertaste. When buying branded items, it is sensible to verify authenticity through the producer’s channels, but the final decision is still made by the cup.

12. Interesting Facts:

• The standard cake weight of 357 g is linked to the tradition of “seven cakes” in a stack (七子饼, qīzǐbǐng): seven cakes made up about 2.5 kg.
• Factory numbering is still in use: the digits 1, 2, 3, 4 in codes indicate Kunming, Menghai, Xiaguan and the factory in Pu’er respectively.
• Recipe 7572 is often called the “benchmark” (标杆) of shu pu-erh, against which other ripe teas are measured.
• There is an ongoing discussion as to whether “Menghai flavour” can be reproduced outside Menghai: proponents of “microbial terroir” believe it cannot.
• Despite the centuries-old history of pu-erh, shu pu-erh is a young tea: the wet-piling technology appeared only in the 1970s.

In conclusion:

Menghai Wei Shu Bing is not a brand and not a specific factory, but a designation of style: ripe pu-erh in cake form, embodying the recognisable “Menghai flavour” with its warm sweetness, dense body and clean fermentation note. Behind this term lies a combination of Yunnan large-leaf raw material and the special post-fermentation environment established in the workshops of Menghai — two factors that together create the character of the drink.

For the practitioner, the conclusion is simple: one should orient not by the inscription but by the cup. A transparent wine-red infusion, a thick rounded taste, a distinct sweet return and an absence of mustiness — these are the honest signs that you have before you a truly worthy representative of the style. Such a tea is good both young and after several years of quiet ageing, which only enhances its depth.

the teas described here are available from teamotea