changpao
It means "long shirt", and is the male equivalent of a female cheongsam (qipao). It has a mandarin collar and often side slits. It is a type of manchu clothing.
Not to be confused with yuanlingpao, which is hanfu and doesn't necessarily have a mandarin collar. When it does have one, it is layered.
Examples
See also
This tag implicates chinese_clothes (learn more).
