Hello, children's education is not as early as possible, because the success or failure of education does not depend on the number of "sufficient goods" or the time of "not losing at the starting line". The key is to teach students in accordance with their aptitude according to their personal acceptance. In any subject, moderate difficulty is a major criterion to stimulate students' learning motivation. Too simple or too difficult will dampen the enthusiasm for learning. If you don't insist on learning something at first, it means that children will forget it after a while.