Neifei: The Little Paper Ticket Pressed into a Tea Cake

Open the cotton paper wrapper and you'll often see a small slip of paper embedded in the leaves on the face of the cake, about half the size of a business card, its edges held down by tea and printed with a factory name or trademark. That slip is the "neifei" (內飛). People seeing it for the first time often think it fell in by accident during packing, but it's placed there on purpose, and it's the hardest part of a tea cake's identity to swap out.

What Is a Neifei?

A neifei is a small piece of paper placed in the mold with the tea when a cake is pressed, steamed and compressed into shape along with the leaves. Common contents include:

• The factory or brand name
• A trademark logo
• Sometimes the product name, recipe code, or year
• In recent years, anti-counterfeiting serial numbers, micro-text, or embossing

The tea world generally believes the character "fei" (飛) comes from Cantonese. Cantonese calls a ticket "fei": a bus ticket is "che fei," a movie ticket is "hei fei." Since Hong Kong was long the biggest distribution hub for pu'er, the term "neifei" stuck, meaning "the ticket inside."

Why Press It into the Tea?

Traditional cake packaging goes, from outside in: bamboo-sheath tong wrap, cotton paper, tea cake. The cotton paper and the tong ticket can both be swapped; only a slip of paper pressed into the leaves can't be tampered with unless you first steam the cake soft and take it apart. Tea merchants pressed their house name into the tea so buyers would know, "I made this cake."

English-language sources on pu'er record something similar: the neifei was originally stuck onto the surface of the cake and only later was commonly embedded during pressing. That change in placement shows its purpose shifting from "labeling" to "proof."

Pressing goes roughly like this: weigh out one cake's worth of tea, steam it soft, place the neifei on the surface of the leaves, then put it in a cloth bag, twist it into shape, and press it tight under a stone mold or machine. That's why the neifei is almost always on the face of the cake, not in the dimple on the back. Details of steaming and pressing are in Pressing Pu'er.

How the Neifei Evolved

• Hao-grade era: Private tea houses used the neifei to mark their house name; it was the tea house's most direct calling card. For vintage periods, read Hao-Grade, Yin-Grade, and Qizi Cakes.
• Yin-grade era: State tea factories' neifei mainly carried the "Zhongcha" trademark. Collectors know a group of iron cakes as "Blue Mark iron cakes" because the character "茶" on both the wrapper and the neifei is printed in blue, so the neifei's ink color became a clue for telling versions apart.
• After the 2000s: As counterfeits multiplied, Menghai Tea Factory began adding anti-counterfeiting features to its neifei and labels around 2005–2006, such as micro-printing and embossing, and later serial numbers unique to each cake.

Some more carefully made cakes have two or more neifei pressed in, or have the year and batch printed directly on the neifei, making it easier to match each cake to its production record.

Can a Neifei Tell You if a Cake Is Genuine?

The neifei is a very good clue, but not a guarantee.

Where it helps:

1. If the neifei matches the brand and product name on the cotton paper, the packaging is at least consistent.
2. For some brands, the serial number on an anti-counterfeiting neifei can be checked through official channels.
3. Comparing the neifei's paper, printing, and typeface with known samples from the same year can reveal obvious discrepancies.

You should also know its limits: precisely because the neifei matters, counterfeiters copy it too. In 2021, authorities in mainland China seized more than 10 tonnes of counterfeit branded pu'er, packaging and neifei included. Also, formats like loose tea, dragon pearls, mini tuocha, and tea bags never have a neifei in the first place, so the absence of one doesn't mean anything is wrong.

The safer approach is to see the neifei as one piece of the puzzle, looked at together with the cotton paper, the neipiao (inner ticket), the tong ticket, the production date, and the seller's description. What to watch for before buying is covered in Six Tips for Buying Pu'er and Common Traps.

What to Do with the Neifei When Prying

The neifei is paper, not tea, so pick it out before brewing. Start prying from the edge of the cake, slow down as you approach the neifei, and use a tea pick to gently loosen the leaves around the slip; the whole piece will then come away. Prying technique is in How to Open a Pu'er Cake.

If you plan to store the cake for a long time and may want to share it or compare it later, you can leave the neifei area alone for now and start drinking from the back or the side, so the neifei stays on the cake. If you've already removed it, tuck it into the cotton paper for safekeeping; like the cotton paper and the neipiao, it's part of the cake's identity record.

FAQ

What's that little slip of paper in my tea cake? That's the neifei, a piece of paper pressed in with the tea during pressing, printed with the factory or brand to show where the cake came from.

Can I remove the neifei? Yes. Use a tea pick to loosen the leaves along the edges of the slip and it will come off; always pick it out before brewing. For a cake you want to keep intact, start prying from somewhere else.

Does having a neifei mean the tea is genuine? Not necessarily. Neifei can be counterfeited too, so check it against the cotton paper, the neipiao, the production date, and the seller's description.

Is it normal for dragon pearls or tea bags to have no neifei? Yes. Neifei mainly appear in cakes, bricks, and other formats where a slip can be placed during pressing. For small compressed pieces like the Bingdao Old Village Dragon Pearls, all the information is printed on the outer packaging.