GB/T 22111 in Detail: Definition, Grades, Processing, and Physicochemical Indicators

Many people are a little surprised the first time they hear that pu'er has a national standard: how can a tea so concerned with mountains, vintages, and storage be written into clauses? In fact, the standard governs pu'er's most basic identity, like the fields on an ID card: where it comes from, what it's made of, how it's made, and what level it has to reach.

Basic Facts About the Standard

• Number and title: GB/T 22111-2008 Product of Geographical Indication: Pu'er Tea
• Published: June 17, 2008
• In effect: December 1, 2008
• Type: Recommended national standard (the T in GB/T means recommended)
• Status: Currently in force; a review on August 4, 2025 concluded it remains valid, and there is no published revision at present

For an overview of the standard, start with Pu'er's National Standard and Geographical Indication; this article goes a level deeper into the clauses.

How the National Standard Defines Pu'er

The standard's definition of pu'er can be broken into three conditions:

1. Raw material: Sun-dried (shaiqing) tea from Yunnan large-leaf varieties grown within the geographical indication protected area.
2. Processing: Made within the protected area using specific processing methods.
3. Quality: Having distinctive quality characteristics.

All three are required. Tea made from small-leaf varieties, tea dried by baking, or tea processed outside the protected area does not meet this definition. The meaning of sun-drying is compared in detail in Sun-Dried, Baked, and Pan-Fired Green Tea.

The standard also defines "post-fermentation": the process by which sun-dried tea or raw pu'er, under specific environmental conditions and through the combined action of microbes, enzymes, moist heat, and oxidation, undergoes a series of changes in its constituents that create the distinctive quality of ripe pu'er. This is the formal term for wodui (pile fermentation).

Raw Tea and Ripe Tea

By processing method and quality characteristics, pu'er falls into two categories:

• Pu'er tea (raw): Compressed tea made by steaming and pressing sun-dried tea into shape.
• Pu'er tea (ripe): Made from sun-dried tea through post-fermentation, divided into loose tea and compressed tea.

There's a detail here that many people miss: "raw tea" in the standard refers to the compressed finished product. Unpressed sun-dried maocha is the raw material for pu'er and isn't listed as a category of finished product. Taiwan Customs' method for identifying pu'er uses a similar classification; see Taiwan's Rules for Importing Pu'er.

Ripe Loose Tea Has 11 Grades; Compressed Tea Has None

Grades mainly reflect the tenderness of the material: special grade is the most tender, with many buds, and the higher the number, the coarser the leaves. Terms often heard on the market such as "gongting" (palace) and "li cha" (gift tea) are commercial names, not grades in the national standard; details are in Grades of Ripe Loose Pu'er.

Processing Flow

The standard sets out three processing routes:

• Sun-dried tea: Spreading fresh leaves → shaqing (kill-green) → rolling → breaking up clumps → drying in sunlight → packing.
• Raw tea (compressed): Refining sun-dried tea → steaming and pressing → drying → packing.
• Ripe loose tea: Post-fermentation of sun-dried tea → drying → refining → packing.
• Ripe compressed tea: Ripe loose tea → steaming and pressing → drying → packing; alternatively, sun-dried tea can be pressed first and then post-fermented.

The key steps are "drying in sunlight" and "post-fermentation." The first separates pu'er from baked and pan-fired teas; the second separates ripe tea from raw.

Physicochemical Indicators

The three most often cited figures in the standard:

Three points stand out in this table:

• Moisture: Ripe compressed tea gets one extra percentage point, generally thought to be because pressing requires steaming the tea soft first, and tightly pressed tea is harder to dry thoroughly.
• Water extract: The substances that can dissolve into the liquor. Raw tea requires at least 35%, ripe tea 28%; pile fermentation turns some substances into insoluble forms.
• Tea polyphenols: Raw tea has a minimum, ripe tea a maximum, in exactly opposite directions, effectively separating raw and ripe by the numbers. How tea polyphenols change is covered in Tea Polyphenols and Catechins.

Besides quality indicators, the standard also sets hygiene indicators and requires labels to state "raw tea" or "ripe tea."

Sensory Quality

The standard describes quality characteristics in words: raw tea has a clean, lasting aroma and a rich taste with huigan; ripe tea has a distinctive aged aroma, a mellow, full taste, and a deep red liquor. Evaluation methods follow another national standard, GB/T 23776-2018 Methodology for Sensory Evaluation of Tea; related standards are covered in Yunnan Local Standards, Group Standards, and Other Related National Standards.

Storage and Shelf Life

The standard requires pu'er to be kept in warehouses that are clean, ventilated, away from light, dry, and free of odors, and states that it is suitable for long-term storage under proper storage conditions. The clauses give no temperature or humidity figures; local regulations' figures are in Storage Standards.

Has the Standard Been Revised?

As of 2026, GB/T 22111-2008 is still the current version, and the 2025 review concluded it remains in force. In recent years, national standards for similar geographical indication products have in some cases been renamed under a "Quality Requirements for Products of Geographical Indication" series, such as the Pu'er coffee standard published in 2025; whether pu'er tea will follow with a new version depends on announcements from the Standardization Administration of China.

FAQ

Which document is the national standard for pu'er? GB/T 22111-2008 Product of Geographical Indication: Pu'er Tea, published June 17, 2008, in effect December 1, 2008, and currently valid.

How many grades does ripe loose pu'er have? Special grade plus grades 1 through 10, 11 in all; compressed tea is classified by shape with no separate grades.

How does the standard describe processing? Sun-dried tea: spreading, shaqing, rolling, breaking up clumps, drying in sunlight. Raw tea: refining, then steaming and pressing, and drying. Ripe tea: post-fermentation, drying, and refining, with ripe compressed tea then steamed and pressed into shape.

How do the tea polyphenol requirements for raw and ripe tea differ? Raw tea must be no less than 20%, ripe tea no more than 15%; pile fermentation transforms a large share of the tea polyphenols.

Has the standard been revised? It's still the 2008 version, which remained in force after a review on August 4, 2025.