Relatives are different: cousins refer to the children of uncles, and cousins refer to the children of aunts, uncles and other relatives.
Different surnames: Cousins have the same surname as yours, but cousins have different surnames.
The specific classification is different: Cousins can be divided into "close relatives" and "distant relatives". Aunt is the second generation, and cousins are collateral blood relatives within three generations. "Kinship" refers to a cousin who has the same grandfather, counting three generations from himself.
For example, parents, children, brothers and sisters and themselves are all parents, so they are with their uncles. This expression can be said to be very clear in words.
"Cousin" refers to a cousin who has the same grandfather as himself, while "distant cousin" refers to other cousins who are not the same grandfather but have the same blood relationship. If you are your father's brother or sister or your mother's brother or sister, you are a cousin, otherwise you are a distant relative.