Why do we pay so much attention to blood relationship?

consanguinity is very important, especially in China. Since ancient times, China people have paid attention to clan consanguinity and family. China people didn't have the concept of country in ancient times, but the concept of family was deeply rooted in the bone marrow. From the appellation, cousin cousin, cousin cousin "Tang" and "table" here refer to the distance of blood relationship! When people in China go out on business, they should call their elders and sisters when they meet older people, or they will simply ignore you when they meet older people who are similar to themselves. The address here makes the other party feel cordial and treat us as their relatives, which will naturally help you.