On the twenty-eighth day of the twelfth lunar month last year, the whole family was around the table when a middle-aged man I rarely saw came over to toast, and my mother nudged me with her elbow. I froze for about three seconds and blurted out "shu", and several people at the table laughed. He is my mother's older male cousin, so by generation I should have called him biaojiu; biaoshu belongs to a different line and refers to a younger male cousin on my father's side. The next day was worse: my aunt's son had an event and I had to write the invitations, and I spent over half an hour on my phone working out how to describe my own relationship to my uncle by marriage and my cousin in the signature. Kinship terms are something you fake on the spot, and a formal occasion exposes it immediately.
1. Why Chinese kinship terms are so tangled: three axes at work at once
English has one word, uncle. Chinese needs three axes to pin it down:
- Which line you are on. Your father's brothers are bobo and shushu, your father's sisters are gugu, your mother's brothers are jiujiu, your mother's sisters are yima. Take an older man of your parents' generation: through the paternal line he is a bo, through the maternal line he is a jiu, and neither word covers the other.
- Seniority and gender. Along the same line, age also matters: older brother, younger brother, older sister and younger sister each have their own word. The difference between bobo and shushu is not blood relationship but whether he is older or younger than your father.
- Collateral peers split into tang and biao. This is the axis that grandchildren living away from home get wrong most often, and it gets its own section below.
Add one layer of in-laws and there are more words still: the wives of brothers call each other zhouli, and the husbands of sisters call each other lianjin. These words describe a relationship; nobody uses them to someone's face. So getting a term wrong is usually not a matter of not knowing the word, but of not having taken the chain apart in your head first.
2. Deciding between tang and biao really comes down to one rule
I later compressed the judgment for collateral peers into three steps, and it has never failed me:
- First check whether the chain passes through your mother's side. If mama appears anywhere on the chain (including jiujiu and yima), peers are always biao: every collateral peer on the maternal side is biao. This only covers blood relatives of the same generation, so do not push it further. It does not apply across generations: your mother's male cousin is an elder and is called biaojiu, while her paternal-line cousins are tangjiu and tangyi. Your wife's sisters are outside the rule too, and are addressed as dayijie and xiaoyimei.
- Then look at who the chain passed through on your father's side. Tang means descent through paternal brothers: the chain goes only through your father's brothers (bobo, shushu), the branch that shares a paternal ancestor with you at your own generation. Apply that upwards and your grandfather's brother's grandson is also tang, though the shared ancestor is now a great-grandfather, which makes it distant tang. If the paternal side passes through a sister (gugu), the child is biao: a paternal aunt's children take their father's surname and were never of the same clan.
- Finally use age for ge, di, jie and mei. Between peers you compare the two people's own ages, not their position in their own family.
So the answer to the question in the title is: the son of your father's older sister is a biaoge or biaodi (a gu-biao cousin), not a tangge. I put the common chains into a table for easy checking:
| Relation chain | Term | Category |
|---|---|---|
| Father's older / younger brother's children | tangge, tangdi, tangjie, tangmei | Tang (same clan, same surname) |
| Father's older / younger sister's children | biaoge, biaodi, biaojie, biaomei | Gu-biao |
| Mother's older / younger brother's children | biaoge, biaodi, biaojie, biaomei | Jiu-biao |
| Mother's older / younger sister's children | biaoge, biaodi, biaojie, biaomei | Yi-biao |
| Grandfather's brother's grandson | tang brothers (distant) | Tang (shared ancestor at great-grandfather) |
| Mother's older / younger male cousin | biaojiu | Maternal elder; the peer rule does not apply |
| Biaoge's wife / older sister's husband | biaosao / jiefu | In-laws |
One generation up there is another matching set: your father's older brother is bofu (commonly daye in the north), and his wife is bomu; for your father's uncles, the standard terms are bozufu and shuzufu, known in some regions as dayeye and xiaoye. Relationships stacked upwards like this are painful to memorise as formulas, and I would rather work up the chain one level at a time.
3. How I actually handle a gathering or an invitation
- Break the chain into one-way steps, starting from me and going up or sideways one level at a time: for example father, then older sister, then son, never skipping levels or merging them. Skipping levels is the main source of errors.
- Click through those levels in the Kinship Calculator, which gives the standard formal term and can also be run in reverse to ask what the other person calls me, a step I used to forget.
- Terms are not mirror images. I call my mother's younger sister xiaoyi, and she calls me waisheng or waishengnu; I call my aunt's husband gufu, and he calls me zhizi or zhinü. You have to derive each direction separately; working out only one side is guaranteed to be wrong.
- Put the result into its setting: face to face, use whatever your family says; for invitations, obituaries and gift ledgers, use the formal term. The two sets coexisting is not a contradiction, it is a division of labour.
- For gift-ledger amounts I write Chinese numerals in their formal banking forms so the digits cannot be altered, and a quick pass through Number to Chinese is less error-prone than assembling the character forms by hand.
4. Regional variation and the limits of any tool
One thing has to be said plainly: Chinese kinship terms vary genuinely by region, and any tool only gives the standard written Mandarin term, not what people say at your own kitchen table. Common points of divergence:
| Standard term | Common in the north | South / Cantonese and others |
|---|---|---|
| Father's older brother | daye, dabo | bofu, abo |
| Father's older sister | gu, gugu | guma, agu (Cantonese) |
| Mother's parents | laoye, laolao | waigong, waipo; in Minnan, Teochew and Hakka, agong and ama usually mean paternal grandparents, so check local usage |
| Mother's sisters | yi, yima | ayi, yiniang, yiyi |
| Older sister's husband | jiefu | jiefu; in the northeast the colloquial guye means son-in-law, not brother-in-law |
In some places gugu means specifically the father's younger sister and guma the older one; in others a man calls his father-in-law both ba and dada. No tool can arbitrate those differences for you; all you can do is hold the standard term and the local one side by side.
The other limit is generational coverage. Common paternal, maternal and in-law relationships within three generations can all be derived; beyond that, such as clan relatives past the five-generation mourning limit, or a doubled in-law link (my biaosao's cousin on her own mother's side), any algorithm can only give you a written approximation. The right move there is to ask an elder in the clan or check the genealogy, not to toast someone with a term you guessed.
5. Common questions
Q: What exactly do you call the son of your father's older sister?
Biaoge or biaodi (a gu-biao cousin). The deciding point is that the chain passes through your father's sister, so it counts as biao; seniority depends on whether he is older or younger than you.
Q: Is there a one-sentence test for tang versus biao?
Yes, but it only covers blood relatives of the same generation: children of paternal brothers, who share a paternal ancestor with you at your own generation, are tang (distant tang simply pushes the shared ancestor back to a great-grandfather); collateral peers on your mother's side are always biao. Do not apply it across generations or to spouses' families: my mother's male cousin is an elder and is called biaojiu; her paternal-line cousins are tangjiu and tangyi; my wife's sisters are dayijie and xiaoyimei.
Q: Local usage differs. Is the term the tool gives correct?
It is the standard term, not the dialect term. Write formal documents with it, and follow the family elders for face-to-face address; the two do not have to match.
Q: How do I know what the other person should call me?
Run the same chain in reverse, rather than guessing from a mirror image. Jiujiu and waisheng, bofu and zhizi, parents-in-law and son-in-law are all asymmetric pairs.
Q: Can cousins marry?
They cannot register a marriage. Article 1048 of the Civil Code prohibits marriage between lineal relatives and collateral relatives within three generations, and tang and biao cousins all fall inside that range. To count the generations, trace each side up to the shared ancestor and take the larger number.
After that New Year dinner I wrote out the chains for everyone who visits our home, seventeen in all: six on the maternal side, seven on the paternal side and four by marriage. This year, when someone raises a glass to me, at least I will not say the name first and work it out afterwards, because behind every term is a mechanical question: who does this chain pass through. Count the who correctly and all that remains is which local word to use.