1. From the relationship with dad, the cousin is related to dad and is the son of dad's brother; Cousin and father are not necessarily related by blood, but are probably the sons of mother and brother.

2. In terms of kinship, cousins are the brothers of their fathers or the sons of their younger brothers, while "Tang" is generally related to their fathers, and cousins are mostly brothers born to their fathers. Cousins are divided into two types, one is cousins and the other is cousins. A father's sister or a mother's brother's son is collectively called a cousin. Specifically, the father's sister's son is also called cousin, and the mother's brother's son is also called cousin.