Qī wǔ qī èr

7572 is not a variety or a place name, but a màihào (唛号), a factory recipe number that has become an unofficial benchmark for the entire genre of shu pu-erh (熟普, shú pǔ’ěr). It is against this tea — with its dense, earthy-sweet profile and its 勐海味 — that the market still measures what should be considered a “proper” pressed shu.

What the number encodes

The màihào system is a short production code that, in the era of planned tea economy, replaced marketing names. The four digits read as follows:

• first two — the year in which the recipe (the blend) was recorded, here 75, meaning 1975;
• third — the average grade of the raw material by leaf tenderness; the lower the number, the more tender the material — here 7, meaning a mid-leaf, “workhorse” level;
• fourth — the factory code: 1 — Kunming (昆明), 2 — Menghai (勐海), 3 — Xiaguan (下关), 4 — Pu’er (普洱); here 2, meaning the Menghai factory.

Thus, 7572 means “1975 recipe, seventh-grade raw material, factory No. 2”. It is important to understand that the third digit does not denote a single specific leaf but the target tenderness of the blend: the blender assembles a multi-grade mixture so that its average tenderness stays at a “seven”. This recipe stability is the very essence of màihào: the taste is tied not to a single harvest, but to a reproducible formula.

Terroir and raw material

7572 is a product of the Menghai tradition (勐海, southern Yunnan, Xishuangbanna prefecture), and it is the Menghai origin that defines its recognisable character. The raw material is the large-leaf Yunnan tea tree variety (云南大叶种, yúnnán dàyè zhǒng), the varietal foundation of all pu-erh: a thick leaf with a high content of polyphenols and extractable substances, which withstands fermentation well and yields a dense, full-bodied infusion.

The 7572 blend is fundamentally multi-grade. Unlike premium “single-bud” shu, a mixture of leaves of varying coarseness and maturity works here: the more tender fractions provide sweetness and “body”, while coarser ones provide structure, tannic backbone, and the characteristic “woody-earthy” base. The seventh grade is precisely this balance: tender enough to be smooth, and coarse enough to maintain richness year after year.

Technology: 渥堆 and 勐海味

Shu pu-erh differs from sheng pu-erh by a key operation — wet piling (渥堆, wòduī). This is a controlled microbial fermentation: moistened tea material is piled into large heaps, where, under the influence of temperature, moisture, and microflora, an accelerated “ageing” takes place over several weeks — a process that would take raw pu-erh decades. The leaf darkens, tannins soften, and a characteristic earthy-sweet, “cellar-like” gamut appears.

The most interesting thing about shu is that wòduī is neither sterile nor identical everywhere. The microflora of the workshop, local water, humidity, and the very school of the masters form a regional imprint — 味型 (wèixíng, “taste type”). For 7572, this imprint is called 勐海味 (měnghǎi wèi, “Menghai taste”): a denser, warmer fermentation with a slight “woody-camphor” depth, distinct from the dry austerity of the Kunming style (昆明味, kūnmíng wèi) and from the lighter Lincang style (临沧味, líncāng wèi). In essence, the “Menghai taste” is what most drinkers subconsciously consider the “taste of shu in general”, largely due to the ubiquity of 7572.

After piling and sorting, the material is pressed into a standard disc — bǐng (饼), the classic 357 g — steamed, moulded, and dried. The pressed form is important: 7572 was conceived as a mass-market, transportable, storable “workhorse” tea, and the disc is ideally suited for this purpose.

Standards and place in the lineup

Pu-erh as a category is regulated by Chinese national standards (GB/T), which separate 生 (sheng, raw) and 熟 (shu, fermented) types and describe material from the large-leaf Yunnan variety. 7572 fits entirely within the canonical definition of shu: large-leaf Yunnan material, having undergone wòduī, pressed into a disc.

In the market hierarchy of shu, 7572 occupies the mid-tier, “benchmark” segment. It is convenient to understand it through its neighbours from the same factory and the same recipe families:

• 宫廷普洱 (gōngtíng pǔ’ěr, “imperial”) — the highest degree of tenderness, almost exclusively buds and the finest leaf; the smoothest and most “velvety” shu, premium;
• 7262 — a modern Menghai recipe using more tender material (sixth grade), noticeably more delicate and “premium”;
• 7572 — the mid-grade “seven”, the benchmark of balance and mass appeal;
• 8592 — a 1985 recipe, ninth grade, from 老五样 (“five old samples”), coarser and more “rustic”;
• 7581 — a Kunming “brick” line (中茶), historically one of the first shu bricks; a different factory, a different shape, and a different wèixíng.

On this scale, 7572 is the reference point: affordable enough to drink daily, and “correct” enough to calibrate taste by it.

Taste and brewing

The profile of 7572 is a textbook example of “Menghai” shu: a warm earthy-woody tone, a distinct natural sweetness in the background, a dense, smooth “body” of the infusion without sharp bitterness. Young batches may exhibit a characteristic “freshly piled” (堆味, duīwèi) nuance — slightly damp and cellar-like; with age, this fades, giving way to a cleaner, rounder sweetness and woody-dried-fruit notes. The colour of the infusion is a deep red-chestnut, becoming almost opaque in strong infusions.

Brewing practice:

• vessel — gàiwǎn (盖碗) or a dense Yixing teapot; shu handles “heavy” ceramics well;
• off-the-boil water (around 100 °C) — fermented leaf loves high temperatures;
• a mandatory “awakening” rinse (洗茶): one or two short infusions, discarded, to remove press dust and soften young duīwèi;
• short infusions (5 – 10 seconds for the first ones, gradually lengthening); shu forgives a heavy leaf load and yields many infusions;
• a generous amount of leaf (approximately 7 – 8 g per 100 ml) — 7572 reveals itself through “body” rather than delicate aromas.

This is a tea that is difficult to “kill” through careless brewing — which is partly why it has become a people’s workhorse.

History and culture

The wòduī technology as an industrial method was refined in the mid-1970s; it is to this moment that the basic recipe numbers of “seventy-five” are tied, including 7572. The emergence of the màihào system and the codification of recipes signified pu-erh’s transition from a bespoke, weather-dependent product to a reproducible industrial standard. 7572 from the Menghai factory (today under the 大益, Dàyì brand) became the most widely replicated shu disc and, effectively, the “face” of the category: it is on this tea that people learn to distinguish shu from sheng, and it is on this tea that the tasting “zero point” is set.

Culturally, 7572 is a democratic, everyday pu-erh: a tea for regular drinking, for calibrating taste, for understanding what the “Menghai” style is. It rarely becomes an object of collecting hype in its own right, but for precisely this reason, it remains the most honest benchmark of the genre.

How to identify

• Read the number. “75-7-2”: 1975 recipe, seventh grade, Menghai factory. If the last digit is not “2”, it is a different factory and a different wèixíng, however similar the disc may look.
• Shape. 7572 is a pressed bǐng disc (classically 357 g), not a brick; a brick is, for example, the Kunming 7581.
• Profile. Look for a medium-dense “body”, warm earthy-woody sweetness, and a “Menghai” character without aggressive bitterness. Excessive coarseness and “rustic” sharpness are closer to 8592; an almost weightless velvety texture and buds are closer to 宫廷 and 7262.
• Material. This is a multi-grade blend, not a “single-bud” material; a uniformly homogeneous, entirely tender leaf upon breakage is a reason to doubt that you have a genuine “seven”.
• Youth vs. age. Fresh 7572 may smell of the pile (duīwèi); this is normal for a young batch and disappears with time, but it should not overpower the sweet-woody foundation itself.

7572 is valued precisely for its predictability: it is not the pinnacle and not a rarity, but a calibrated benchmark against which it is easiest to learn to hear what shu pu-erh is actually saying.