Don't be too reasonable.
Don't give him too many reasons, it's useless, because children before 10 have no logical thinking ability, so they don't know what is right or wrong.
Pay attention to your own behavior
We adults must be careful not to show our bad temper in front of children and get angry easily. To know that children's imitation ability is very strong, we must show our patience and tolerance in front of children.
Understand children's needs
We should know as much as possible about children's real needs, don't always order them to do this and that, and certainly don't spoil them too much.