Classification and Origin
Classification origin: Three Dates the Year Can Mean
**Year of raw material harvest (原料年份, yuánliào niánfèn).** The date when the leaf was picked and processed into 晒青毛茶 (shàiqīng máochá) — sun-dried raw material for pu-erh. This is precisely the date a collector usually wants to know when speaking of "tea of such-and-such year": it ties the tea to a particular spring or autumn, to the harvest of a specific season.
**Year of pressing (压制年份, yāzhì niánfèn).** The date when the raw material was steamed and pressed into a cake 饼 (bǐng), brick 砖 (zhuān), bowl 沱 (tuó), or rolled into 龙珠 (lóngzhū). The pressing of compressed tea itself is associated with standard GB/T 24615; what exactly it prescribes regarding dating is not examined here. From the moment of pressing, the "life" of a specific form begins: before that, the tea lay loose and aged differently — faster, with greater access to air.
**Year of batch release (出厂年份, chūchǎng niánfèn), or the production date on the label.** Formally, the moment when finished product is processed as a batch and released from the producer's warehouse. For packaged food products in China, the label requires a production date, and for pressed pu-erh this field, as a rule, contains the date of packaging or pressing, not the date of leaf harvest. That is, the legally required "production date" and the date that interests the buyer are different things by definition, not by malice.
| Date | What it records | Where it may appear | How verifiable |
History and Culture
History culture: Why the Dates Diverge
The divergence is built into the technology and the economics.
First, raw material can lie stored before pressing. 晒青毛茶 is kept loose — sometimes for several months, sometimes for years. The reasons may be production-related (waiting for the "green" sharpness of fresh leaf to fade), procurement-related (material bought in a harvest year with a reserve), and market-related (the price of finished tea dropped, pressing is unprofitable). Therefore, a cake pressed in one year may well consist of leaf harvested several years earlier.
Second, a pressed cake can lie stored before sale. A batch is released, packed into 件 (jiàn) — transport cartons — and kept in the producer's warehouse, at a wholesaler's, at a trader's. Between pressing and the tea's appearance in retail, several years often pass: for pu-erh this is normal, since the principle 越陈越香 (yuè chén yuè xiāng) — "the older, the more fragrant" — turns storage not into spoilage but into part of the production cycle.
Third, many cakes do not have a single harvest year at all. 拼配 (pīnpèi) — blending — is standard practice at large factories: one recipe mixes raw material from different regions, different grades, and different harvests. The recipe logic of 唛号 (màihào), the four-digit codes used since 1976, shows this directly: in 7542, the first two digits mean the recipe year (1975), the third — the grade of the raw material, the fourth — the factory (2 — 勐海, Měnghǎi). The recip
Botany and Raw Material
Botany material: What the Markings Inside the Packaging Say
Pu-erh has several information carriers, and they carry different weight.
**内飞 (nèifēi)** — a small paper label pressed inside the cake. Its value lies precisely in the fact that it is pressed together with the leaf: replacing a wrapper is easy, while removing and replacing an 内飞 without destroying the cake is almost impossible. But it typically contains the producer's name, the brand, sometimes the recipe or series — the year appears on an 内飞 far from always. That is, it is more a confirmation of origin than a dating.
**内票 (nèipiào)** — an insert sheet under the wrapper, with a product description. It lies freely inside and therefore carries almost no evidentiary weight, although its printing style and wording are sometimes correlated with a particular period.
**大票 (dàpiào)** — the "large ticket," a sheet placed in the transport carton 件. It usually lists the product name, recipe, number of cakes, batch number 批次 (pīcì), and a date — closest to the production date. 大票 is the most informative of the papers, but its fate is telling: the transport carton is broken down at wholesale, and the 大票 most often never reaches the end buyer. A single cake almost never comes with its 大票, and a 大票 without the cakes proves nothing.
**Wrapper (棉纸, miánzhǐ)** and the production date sticker — the most visible and the most easily replaced carrier. Wrappers tear, insects eat them, and during long storage they are sometimes replaced
Terroir
Terroir: Why This Is Not Fraud in Itself
The situation where "the year on the packaging" means not what the buyer assumed arises without any deception. The producer is obliged to indicate the production date and indicates it honestly. The harvest year of the raw material is often not indicated because for a blend it is incorrect, and for a single-origin material it is not mandatory. The seller, calling a tea "a 2014 cake," usually means the production date, because that is the only date confirmed by a document.
Hence the main practical conclusion: the question to ask is not "what year is the tea" but "which date exactly is meant." The answer "this is the pressing year, the raw material was harvested around the same time" and the answer "this is the pressing year, the raw material lay for three years" describe different teas at the same price.
Deception begins elsewhere: when the year on the wrapper is printed knowingly false; when an old year is attributed to tea "aged" rapidly in a humid warehouse 湿仓 (shīcāng) — a practice known as 做仓 (zuòcāng); when a cake is rewrapped in a wrapper of an earlier period; when a recipe number 唛号 is passed off as the year of release. Here we are no longer speaking of a divergence of dates but of forgery — yet distinguishing one from the other by the appearance of the packaging is difficult precisely because legitimate reasons for divergence are also numerous.
Production
Production: 中期茶 and Old Tea: Where the Year Carries Value
The older the tea, the more expensive the year. For young sheng, a one-year difference barely affects the price: the tea is still changing quickly and predictably. In the segment of 中期茶 (zhōngqīchá) — "mid-term tea," loosely from about ten to twenty years of aging; a strict boundary fixed by a standard is unknown to us, and the figures here are a market convention — the year begins to work as a price multiplier: tea that has "crossed" the decade trades differently from tea a year younger.
In the antique segment, the year number becomes the main carrier of value. Here the same epochal scale operates as in pu-erh generally:
- **号级茶 (hàojíchá)** — teas of private trading houses 商号 (shānghào) before the 1950s: 同庆 (Tóngqìng), 宋聘 (Sòngpìn), 福元昌 (Fúyuánchāng). Auction rarities.
- **印级茶 (yìnjíchá)** — products of 中茶 (Zhōngchá) of the 1950s–70s, named after the color of the "中" seal: 红印 (hóngyìn), 绿印 (lǜyìn), 黄印 (huángyìn).
- **七子级 (qīzǐjí)** — from the 1970s, the era of 唛号 and the 七子饼 (qīzǐbǐng) standard weight of 357 g.
- Modern era — from the 1990s, the era of brands; the registration of 大益 (Dàyì) dates to 1989.
For 号级 and 印级 teas, production dates in the modern sense do not exist: they are dated by features of the wrapper and seal — 版面 (bǎnmiàn), by paper composition, by fonts, by features of the "中" sign. This is the work of a connoisseur, not a document, and attributions of this kind are regu
Organoleptic Profile
Organoleptic: Indirect Signs and Their Actual Reliability
An attempt to determine the year "by eye" relies on a set of observations, each of which says not quite what one would like.
| Sign | What it actually shows | Limitation | |---|---|---| | Yellowed, brittle wrapper | the paper lay for a long time | the wrapper may have been replaced; paper can be artificially aged | | Insect holes, stains | storage conditions | depend on warehouse climate, not on duration | | Dark, browning dry leaf | degree of oxidation and fermentation | in a warm humid climate achieved many times faster | | "Aged" aroma 陈味 (chénwèi) | accumulated fermentation | appears early in a humid warehouse and with extraneous notes | | Appearance of 内飞, printing style | period to which the design belongs | designs are repeated; the label may be a modern replica | | Pressing density, appearance of the cake edge | technology of a specific production | not directly related to time |
The main reason for unreliability is that storage conditions matter more than the calendar. A cake that lay for ten years in Kunming in a dry warehouse 干仓 (gāncāng) in a cool and dry climate may, by color, aroma, and infusion, look younger than a cake of five or six years from a warm and humid region. The reverse is also true. Therefore, tasting assessment gives rather a "distance of fermentation traveled" than a number of years, and translating one into the other without knowledge of the warehouse history is not possible.
The second
Chemical Composition
Chemistry: Green and White Tea: The Same Number, the Opposite Meaning
For most Chinese teas, the year on the packaging means exactly the opposite of what it means for pu-erh.
**Green tea 绿茶 (lǜchá)** is valued fresh. Here not only the date matters but the season: 明前 (míngqián) — harvest before the 清明 (Qīngmíng) festival, 雨前 (yǔqián) — before 谷雨 (Gǔyǔ). The fresh harvest 新茶 (xīnchá) differs from last year's stock in aroma and taste noticeably, and here the production date and the harvest date practically coincide: green tea does not lie for years before packaging, because there is nothing to wait for. For it, the year is a marker of freshness and remaining shelf life, and "old" green tea is simply tea that has lost its aroma.
**White tea 白茶 (báichá)** occupies an intermediate position: young 白毫银针 (báiháo yínzhēn) is drunk as fresh, while 寿眉 (shòuméi) is deliberately aged, and 老白茶 (lǎobáichá) is a separate market segment with its own price logic. Therefore, for white tea the year is read in two ways and depends on which product is before us, and the conventions here are less established than in pu-erh.
Oolongs split into two groups: fresh 清香 (qīngxiāng) aromatic ones depend on the harvest date almost like green teas, while roasted and repeatedly re-roasted ones (陈年老茶, chénnián lǎochá) allow multi-year storage with periodic re-roasting — and then the date again begins to mean aging rather than freshness.
Thus, the same inscription "2019" on a box means
Health Notes
Health: A Reasonable Position for the Buyer
From the above follow several simple guidelines that do not require expertise.
- A year without qualification is incomplete information. The clarification "harvest year" / "pressing year" / "production date" changes the meaning.
- For blends, a single harvest date is conditional; it is more correct to speak of the predominant raw material or of an upper bound.
- A 唛号 such as 7542 is a recipe, not a year of release and not an indicator of storage.
- The documentary value of markings declines as follows: 大票 and 内飞 → batch label → wrapper → appearance of the leaf.
- Storage history matters more than the year. Ten years of dry warehouse and ten years of humid warehouse yield different teas.
- The older and more expensive the tea, the less likely its year is confirmed by a document, and the greater the role of the source's reputation.
Brewing
Brewing: What This Article Does Not Claim
A number of questions remain beyond verifiable knowledge, and this should be stated directly.
Regulatory part. The article does not cite numbers and editions of standards regulating the date marking on tea packaging, and does not assert that a norm exists anywhere requiring the harvest year of the raw material to be indicated: such requirements are unknown to us. Of the technological standards, only the one associated with pressing is mentioned — GB/T 24615; the content of its requirements regarding dating is not examined here. Shelf life, batch processing procedures, and export rules vary and are not described in the article.
Segment boundaries. The definition of 中期茶 is given as a market convention. The article does not establish either a precise lower or upper boundary in years fixed officially, and different markets understand this term differently.
Attribution of old teas. Everything concerning the dating of 号级茶 and 印级茶 by features of the wrapper and seal is the domain of collector expertise with internal disputes. The article does not provide specific signs of a "genuine" 红印 or other antique tea, does not offer methods for determining the year from paper, and does not claim that such methods yield a reliable result.
Quantitative relationships. We do not provide figures on how often raw material lies before pressing, by how many years on average dates diverge, what share of cakes on the market has incorrect dating,
