Learning Olympic Mathematics, to put it bluntly, is for junior high school. In addition, the math class in primary school is really too simple. If you don't learn olympiad, there will be nothing for children to do in math class. I remember that when we were young, the top class had to learn Olympic mathematics. Now, in order to lighten the burden, the Olympic Games are banned. Later junior high school entrance examination and junior high school, Olympic Mathematics played a great role. After studying well, math scores have improved, and junior high school will not be difficult. My mother is a primary school math teacher. She probably started to train me to learn Olympic Mathematics when I was in grade two or three, but I was stupid and lazy at that time. I have never studied hard and never persisted. Later, I went to the top class of the sixth grade, and my mathematics was far from others' learning of Olympic Mathematics, not only in grades, but also in thinking. Good thinking exercise is really helpful to junior high school and senior high school in the future.