Objective factors: family material environment, children's social environment, children's innate genes, etc.
As the saying goes, at the age of three, you are old, and at the age of eight, you are old. Children's pre-school psychological development is very important. Children's future behavior patterns, ways of thinking and three views (world outlook, outlook on life and values) are all the foundations laid at this stage. Therefore, guardians (usually parents) should not neglect to take care of children because of too much work or too much trouble.