What do you mean, a partial son is not?

It means that among many children, the one who is loved by his parents is not taken care of by his parents when he is old. This sentence mainly expresses the education of parents to their children. They shouldn't take sides because of their personal preferences. All children should be treated equally and fairly, so that children can grow up in a fair and just environment. At the same time, this sentence also implies that parents should attach importance to their children's morality and self-cultivation, cultivate their independence and sense of responsibility, and let their children become responsible and responsible people.