Clans, also known as wooden relatives and wooden families. Refers to the paternal male blood relatives and their spouses and the "inner daughter" from the same ancestor. It consists of three parts of relatives: one is paternal male blood relatives from the same ancestor. Such as father, grandfather, uncle, uncle, brother, son, grandson, etc. This kind of relative has the same surname, which was also called "Mu Zong" or "authentic" in the old law. Second, the spouses of paternal male blood relatives from the same ancestor, such as mother, grandmother, wife, daughter-in-law, menstruation, etc.

Although these women belong to foreign surnames, they joined because they were married to "Mu Zong" men. "husband teaches". The old law called it "returning a wife"; Third, the blood relatives of unmarried paternal women from the same ancestor, such as unmarried daughters, sisters, aunts and nieces. The old law called it "the woman in the house". Once married, they leave their parents' clan and become relatives of their husbands' clan. If her husband really "divorces" her and returns to her family, she will restore her father's clan membership. In real life, the tradition of kinship in feudal society has not been changed, and male wood still plays a decisive role in kinship. In-laws refer to the kinship generated by marriage, except the spouse himself. If a man marries a woman, they are relatives of each other. Another example is that a relative of a person marries someone else. Let yourself have a relationship with others. These relatives are called in-laws. According to the relatively recognized viewpoint in China's marriage and family law. In-laws are divided into three forms: blood spouse, blood spouse and blood spouse.

(1) Blood spouse. Refers to the spouses of relatives (including direct blood relatives and collateral blood relatives) who are related to themselves, such as sons' wives (daughter-in-law), women's husbands (son-in-law), brothers' wives (sister-in-law, brother-in-law), uncles' wives (aunts) and aunts' husbands.

(2) the blood relatives of the spouse. Refers to the blood relatives of the spouse, such as the wife's parents (father-in-law, mother-in-law), the husband's parents (in-laws), the wife's uncles, aunts, prostitutes and their children, and the husband's uncles, aunts and their children.

(3) the spouse of the spouse's blood relatives. Refers to the husband or wife of a spouse's blood relatives. This kind of in-laws were formed by two marriages instead of one marriage. Such as: husband (brother-in-law) of husband and wife's sister, wife and wife (sister-in-law) of husband's brother, etc. Because this relationship is indirect and distant, the legislation of some countries does not regard the spouse of the spouse's blood relatives as in-laws.

China has a historical tradition of recognizing this in-laws relationship. For example, in the "kinship" of the civil law of the Kuomintang government, it is stipulated that in-laws include not only the spouse of blood relatives, but also the spouse of blood relatives. As for blood spouses, national legislation generally does not list them as examples of in-laws. (1) spouse. (2) blood relatives. There are two kinds: one is natural blood relatives. The second is to propose blood relatives. (3) in-laws. There are three kinds: one is the spouse of blood relatives. The second is the blood relatives of the spouse. The third is the spouse of the spouse's blood relatives.