Reading pu'er wrappers and neifei

一The printed pieces#

A factory cake carries more paper than it seems. The wrapper itself, 棉纸 (miánzhǐ, "cotton paper", in fact a soft paper), carries the brand, the name and, on modern tea, the recipe code, production date and standard. Pressed into the face of the cake is the neifei 内飞, a small ticket with the factory mark; on classic export cakes it shows the eight red 中 round a green 茶 above the factory name. Under the wrapper lies the neipiao 内票, a leaflet in Chinese and English. Seven cakes make a tong 筒, traditionally wrapped in bamboo husk 笋壳; modern Dayi cakes go seven to a paper bag, the ti 提, and six 提 to a case, 件, for the 357 g 7542. A case ticket 大票 packed in the case or basket gives product name, export number, batch and quantity; a tong ticket 筒票 has been rare since about 2000.

Each piece was meant to identify the tea, and each can be checked against the others: the recipe code, batch and date on the wrapper, the factory on the neifei, the batch on the case ticket. See Pressed tea and pu'er codes for the codes themselves.

A blank wrapper can also reflect how tea was commissioned and sold. During her 2007 fieldwork in Yiwu, Zhang encountered cakes in plain white paper, called baiban (白版). One producer associated this presentation with small household production; Zhang also recorded outside traders ordering blank-wrapped cakes to put in their own branded wrappers. These are documented practices in that setting, not a way to authenticate an unmarked cake today. Ask who made the tea, who wrapped or rewrapped it, and what evidence connects the two: plain paper alone establishes neither age nor provenance (Zhang 2014, pp. 150–151).

二The 中茶 mark and the Qizi name#

The mark on most classic wrappers belongs to the China Tea Company, approved on 23 November 1949. Its red "eight 中" trademark, a green 茶 ringed by eight red 中 characters, was introduced in 1951 and is described as the first tea trademark of the People's Republic; one account dates its registration to 1952, as No. 8071, and says the state factories were required to use it. Kunming's factory used 八中茶 as its main brand before turning to other marks, 吉幸 and 金鸡, for export. See CNNP.

The words on export wrappers changed too. In 1970, according to Chinese Wikipedia citing Shi Kunmu, the Yunnan tea import-export company changed 圆 to 饼 and registered 七子饼茶, "seven sons cake tea", in place of the 中茶牌 普洱圆茶 of earlier wrappers; another excerpt attributed to the same author gives 1972. A cake whose wrapper still reads 圆茶 belongs, on the face of it, to the earlier period.

三Mark-era cakes#

The mark-era cakes of the 1940s to 1970s are named after the colour of the character 茶 in the logo: Red Mark 红印, Green Mark 绿印, Blue Mark 蓝印 and Yellow Mark 黄印. The Hong Kong auction house L&H says that only Red Mark pu'er and Red Mark tuocha used a red 茶; it dates its Red Mark lots from the 1940s to the early 1950s, on hand-made long-fibre paper printed in traditional characters, and distinguishes printings such as the "early large characters" and the "one red dot", a dot in one 中 that it attributes to the carving of the wooden printing block. A single cake of about 341 g was estimated at HK$680,000–1,000,000 in 2024.

Attributions are softer than prices suggest. L&H dates Green Mark to the 1950s as a Menghai tea, calls Blue Mark "generally believed" to be Xiaguan, and dates a Yellow Mark stack to the mid-1970s; TeaDB lists Blue Mark under Menghai instead. A Taiwanese book drawing on a former Menghai director says the blends and leaf origins of mark-era tea were never documented, that the story of Red Mark as tribute tea has no evidence, and that Red and Green Mark are hard to tell apart by quality. Treat any mark name as a family resemblance, not a production record.

四Paper, print and collectors' jargon#

Paper and print are evidence, but slippery. A detailed community explainer gives this sequence for Qizi wrappers: hand-made bark paper in the 1970s, semi-hand-made paper beside it in the 1980s, and machine-made 棉纸 from 1996. Xiaguan's export tuocha came in striped kraft paper, from a Tianjin mill until the late 1980s and then from Mangshi. In the 1970s wrappers were printed in Kunming on single-colour presses; in the 1980s printing moved to county shops in Menghai and Simao, with hand-drawn plates and hand-mixed ink, so colours vary from batch to batch. Early export tea carried no printed date at all.

Collectors sort wrappers by small details: 大口中 or 小口中 for the size of 中 in the bottom line, 大七 or 小七 for the shape of 七, 尖出飞 or 平出飞 for the top stroke of 出 on the neifei. The same explainer argues that these labels were coined by Hong Kong and Taiwan traders and are unreliable for dating, since paper came from different suppliers. Script is no simple test either: L&H sells a 1995/96 Menghai 8582 whose neifei is printed in traditional characters, and separates 1980s 8582 into thick- and thin-wrapper stacks. Much of what collectors prize from that decade traces to Menghai's blending under 邹炳良 (Zōu Bǐngliáng), director from 1984 to 1996, credited with 8582 for Hong Kong's Nantian company and with the 1988 7542.

五From 中茶 to 大益, and other factory marks#

Menghai's own brand, 大益 (Dàyì, TAETEA), was first used in 1988 and registered in 1989 as an export brand, partly, one account says, to avoid paying to use the 中茶 mark. The joint-stock company registered it again on 22 March 1995; from 1999 the factory took orders itself rather than through the provincial company; and it became private on 25 October 2004. A vendor's statement that Menghai went private in 1996 conflicts with these dates. The year Menghai stopped printing the eight-中 mark on its wrappers is not documented in the cited sources. In 2006 an individual's attempt to register an identical 大益 design was reported as a likely bad-faith filing. See Menghai Tea Factory and Dayi.

Xiaguan's marks have their own history. The Kangzang factory, founded in 1941, registered 宝焰 and from 1942 sold its jincha to Tibet and Sichuan; 松鹤 became Xiaguan's registered tuocha mark in 1992, and the factory was privatised in April 2004 (Xiaguan Tea Factory). The Kunming Tea Factory stopped production in 1992 and closed in 1994, after which "7581" bricks were made by small workshops until the brand was revived. TeaDB notes that recipe numbers were poorly regulated before 2005, so a familiar number on a wrapper proves nothing about the maker.

六What a label must say#

For modern domestically produced prepackaged tea sold in Mainland China, GB 7718-2011 governs relevant label information, including the food name, ingredients, net quantity, producer details, production date, shelf life and storage conditions. The applied standard must be read from the pack; do not assume every label necessarily declares GB/T 22111. The official FAQ allows different types of applicable product standards.

A production date identifies completion of the final sale unit, including packaging or filling. It does not independently establish the harvest year of the leaf, and a pressing date should not be inferred without knowing the process. Ask for separate raw-material and processing records. Shelf life may be expressed as a period or a date under the 2011 rules; it is not always a second year-month-day date.

The prohibition on adding or overprinting dates targets alteration of existing date information. The official FAQ explicitly permits a complete self-adhesive label containing the dates. A sticker is therefore not, by itself, evidence of an unlawful date change; examine what it covers and whether records agree.

GB 7718-2025 takes effect on 16 March 2027. Keep current requirements, transition arrangements and future changes separate when interpreting wrappers. Neither an attractive old label nor a formally complete modern one proves the contents’ age or origin. See How to read a tea name for distinguishing label facts from sales claims.

七Anti-counterfeit features and fakes#

Menghai added security features over the years. A Taiwanese auction listing that cites the factory dates its anti-counterfeit wrapper label and neifei to 1 January 2006, with an upgrade in 2007 (ultraviolet checks, a label that splits when opened, a metal thread with 大益 microtext) and a revision in 2010; this is a vendor's account, and we have not found the factory's own. Dayi is also among the most faked brands.

The Shanghai case of 2021 shows what fakes look like at scale. Police broke it in March and announced it in April: 11 suspects, 10 workshops, more than 10 t of fake brand-name cakes and over 20,000 fake wrappers, with printing plates and heat sealers. The online shop sold famous cakes for about ¥200–800; a 2003 Six Star Peacock cake, once valued above ¥1 million, went for just over ¥200. The rights holder told the fakes by wrapper material, layout, colour, fonts and logos. The headline value of ¥1.8 billion was a claimed market value; real sales since July 2019 were just over ¥2 million.

So read a wrapper as one witness among several. Paper, print, neifei, case ticket, batch and price should all tell the same story, and so should the leaf: a "1990s" cake that looks and tastes young may have been made to look old 做旧.