How to Read a Pu-erh Wrapper: Recipe Numbers, Nei Fei and the Words That Matter

A pu-erh wrapper tells you four useful things: whether the tea is raw or ripe (生茶 sheng cha or 熟茶 shu cha), where it claims to come from, who pressed it and when. The four-digit number you see on factory cakes, such as 7542, is a recipe code, not a year. Read the wrapper as the seller's claims, then check them against the leaf and the cup, because paper is far easier to fake than tea.

Most of the print on a cake is Chinese, and some of it is decoration. A few words do most of the work, and once you know them a wrapper stops looking like a riddle. If plain tea names are still new to you, start with Chinese tea names explained. More on the tea itself is in the pu-erh guide.

The words that matter most#

On the wrapper	Pinyin	What it tells you
普洱茶	pu'er cha	Pu-erh tea
生茶 / 熟茶	sheng cha / shu cha	Raw or ripe: the single most important line
云南七子饼茶	Yunnan qi zi bing cha	"Yunnan seven-son cake": a round cake, sold seven to a bamboo bundle
大叶种	da ye zhong	Large-leaf Yunnan tea plant, the raw material pu-erh is made from
古树	gu shu	Old trees, a claim about the source
乔木	qiao mu	Tree-grown tea rather than bushes
生产日期	shengchan riqi	Production date
净含量	jing hanliang	Net weight, usually 357 g for a cake

The raw-or-ripe line is the one to find first. The two teas are made in completely different ways and taste nothing alike, which is the whole subject of sheng vs shou. On some wrappers it's printed small, almost as an afterthought, while the factory name gets the big letters.

Seven cakes to a bundle#

Qi zi bing (七子饼) means "seven-son cake". The classic cake weighs 357 g, and seven of them are wrapped together in bamboo leaf as a tong (筒). That's why the phrase appears on so many wrappers that have nothing else in common.

Other shapes have their own names. A tuo cha (沱茶) is a small nest, classically 100 g. A brick (砖茶) is usually 250 g, and a mushroom-shaped jin cha (紧茶), popular in Tibet, also around 250 g. Portion-sized pieces of 5–7 g are covered in mini pu-erh.

Decoding a recipe number like 7542#

Big state factories have long named their standard blends with four digits. Each digit means something:

• First two digits: the year the recipe was created. The 75 in 7542 means 1975.
• Third digit: the grade of leaf in the blend.
• Fourth digit: the factory. 1 is Kunming, 2 is Menghai, 3 is Xiaguan, 4 is Fengqing.

So 7542 is a 1975 Menghai recipe built around grade-4 leaf. 8582 is a Menghai recipe from 1985, and 7572 is Menghai's best-known shou. Some factories add a batch number after a dash.

The trap is reading the number as a vintage. A cake labelled 7542 can have been pressed last spring; the recipe is simply old. The number also doesn't say whether the tea is sheng or shou, so don't use it in place of the 生茶 / 熟茶 line. And popular codes are exactly what copiers like to print, which is one of the routes in how fake pu-erh works.

Mountains, villages and old trees#

Smaller producers rarely use recipe numbers. Their wrappers name a place instead: Yiwu (易武), Lao Ban Zhang (老班章), Bingdao (冰岛), Jingmai (景迈). A place name is the biggest selling point a cake can have, and the biggest temptation to stretch the truth. Far more "Lao Ban Zhang" is sold than the village could ever grow.

The same caution applies to 古树. It's a description, not a certificate, and no wrapper can prove the age of a tree. What old-tree leaf actually is, and how to judge it, is in gushu pu-erh. For how the famous places differ in the cup, see pu-erh regions.

Dates, tickets and the small print#

Good producers state at least the year of pressing, and often the month. A missing date isn't proof of anything, but it's a reason to ask questions.

Look at the cake itself too. The nei fei (内飞) is a small paper ticket pressed into the leaf when the cake is made; it should be embedded, not glued on top. Some cakes also have a larger printed slip, the nei piao (内票), tucked under the wrapper. On mainland retail cakes you may also find the pu-erh standard number, GB/T 22111, which defines pu-erh as sun-dried large-leaf Yunnan tea from set growing areas.

The wrapper's condition should match the age it claims. Old paper yellows and softens unevenly. A crisp, perfectly uniform "aged" wrapper, or a brand-new wrapper on a supposedly old cake, is worth a second look.

What no wrapper can tell you#

Liao Yirong, who founded a pu-erh museum in Taiwan, put it bluntly. Don't judge pu-erh by its stated age, its packaging, how dark the liquor is, a "storage" aroma or the age of the trees. Judge the cup: clean taste with no mustiness, a chestnut colour rather than lacquer-black, and signs of dry storage.

A wrapper also says nothing about how the cake was kept, and storage shapes an aged cake as much as the leaf does. That story is in wet vs dry storage.

So read the wrapper the way you'd read a menu. It tells you what's being offered and who is offering it. Whether the dish lives up to the description is decided in the gaiwan.