It is really important. I used to think that the affection between people is more important, and it doesn't have to depend on blood relationship. Now I think blood relationship is amazing. My brother and I obviously have different views, and we don't talk much at ordinary times. We didn't participate much in each other's growth, but he still gave me more security than my best friend. Many people's feelings are too subtle, human nature is too complicated and changeable, and blood relationship is much more stable. Of course, nothing is absolute. Anyway, blood is very important to me. It is really a gift of fate that I can have a brother in a family where most of our generation are only children. In the process of getting along with people, I actually care very much. This behavior is more like obsessive-compulsive disorder than selfish. But grew up together in a family. The same parents, shared family resources, I don't know, just give it up, which allows me to save snacks with compulsive behavior.