In Chinese the word for it is the same. We don't make the sister/cousin distinction explicit, we just call them sister if we are of the same generation. This leads to hilarious shit like 55 year old men calling me older brother because he's the 5th generation whereas I am the 3rd.
Historically cross-cousin marriages were allowed, alongside marrying your wife's sisters if their husbands died (mainly a north China thing). Didn't stop the royalty from incest though. Cousin marriage with one direct generation is banned per 1981 marriage law (revised in late 90s), marriages within three generations of separation is heavily stigmatized (read: unoffically banned)
We're of the same generation, even though I think we're about three degrees separated.
The old marriage law was unusually strict (1950s). It made legal age 20 for men and 18 for women, banned foreigner and interracial marriage (read: with africans/whites other "asian" groups within proximity of China okay)
Historically in China divoice could be no fault (both genders, generally men initiating it, but not always) or unilateral by the husband.
No fault required a note from the husband
unilateral had seven possible reasons, infidelity, impious, infertility, adulterous, vain/jealous (if she objects to man getting multiple wives), std, gossipy, or steals.
There are three circumstances where he cannot initate a unilateral divoice:
1) She has no family to return to (as confucious would mandate suicide in this case)
2) She observed proper mourning period for in law parents
3) Husband was poor and became rich
Some degree of this applied to the rich city folk in the Tang era, there is a very well recorded incident of a rich woman executing a man who offended her. Once again, I blame Confucius (He is the first SJW in my opinon).