1. Different from family members. Grandpa, grandma, dad, mom, unmarried brothers and sisters living together, children and their wives (husbands) are all family members, not social relations, so there is no need to fill in here. But if there are no family members in the form, you can fill it in here.
2, the distinction between the main and the non-main. A person's social relations are many, but they are all closely related to himself, and only those that have a significant impact on himself are considered as major social relations.
For example: married brothers and sisters and their wives and husbands; Aunt (uncle), uncle (aunt), aunt (uncle), uncle (aunt). If other cousins or even cousins have a great influence on you, as you said, they are professional counterparts, engaged in the work in the corresponding fields, and have made extraordinary achievements, of course, they can also write it down.
Historical evolution:
Social relations based on blood or physiological ties. It is the earliest social relationship formed by human beings, and the development of society constantly endows it with new contents. Throughout the different stages of historical development, the social groups linked by blood relationship are: race, clan, clan, family and so on.
In different times and different social systems, the degree, status and function of kinship are different. In primitive society, blood relationship is an important foundation of social organization. In slave society and feudal society, consanguinity is an important symbol to distinguish social classes. Since modern times, the status and role of consanguinity have declined.