Rich parenting experience
First-born parents have no parenting experience and are basically experiments. Moreover, when the first child is born, the parents' age is not the best childbearing age. I have accumulated a lot of experience in the process of parenting, and the second child is especially beneficial. As for the third child, my parents are tired, my brother will take it, and more often, my brother will take it.
Get more care
The second child usually gets more care. In addition to the care of parents, there is also the care of my brother or sister.
Low family pressure
The pressure of the second child from the family is relatively small. If the family is poor, the first child may take on some family responsibilities and work early to earn money to support his family. If the family has money, the first child may inherit the family business and have no freedom to choose a career. It's okay to have a second child. You can do anything you like. Often can play to their strengths.