It can be understood as: "Big brother is like a father." The eldest son and elder brother in the family should assist their parents to take care of their siblings and be responsible for housework; When parents are not at home (going out, secular), the boss of the family should take the responsibility of parents, take good care of younger siblings and educate them.

As the saying goes, "the eldest brother is the father, and the eldest sister is better than the mother." This sentence makes it clear that the eldest of the children has the responsibility to take care of their younger brothers and sisters and help their parents pull this home. Being a father means that a brother should not only take care of his siblings, but also shoulder the responsibility of education and training. Siblings and big brothers are not only a kind of sibling affection, but also a little similar to the kind of parenting with parents. Respect for big brother is second only to respect for father, so there is a saying that "big brother is father".