Marriage between immediate relatives and collateral relatives within three generations is prohibited. Direct relatives refer to people with whom they have a biological relationship, such as grandparents, parents, children, grandchildren, etc. And within three generations of collateral blood refers to the same three generations of kinship with their own, such as aunts, uncles, nephews, nieces and so on.
The specific scope of marriage between close relatives includes:
1, between parents and children, between grandparents and grandchildren, grandma, grandpa and grandson, granddaughter, of course, can not marry.
2, and their uncles, uncles, aunts, aunts can not marry.
3, and their own brothers and sisters, Cousins, Cousins can not marry.
(4) Brothers and sisters from the same parents (including half-brothers and half-sisters), that is, children of the same parents cannot marry each other.
(5) Different uncles, uncles, aunts, aunts and nephews (female), nephews (female), that is, uncles (uncles) cannot marry daughters of older brothers (younger brothers).
6. An aunt cannot marry a brother's son; An uncle cannot marry a sister's daughter; An aunt cannot marry a sister's son.
As for the "distant relatives" often said by ordinary people, they generally have no direct blood relationship and do not belong to the range of close relatives who are prohibited from marriage.