I have heard colleagues say this before, and I sent my child to Beijing New Oriental Youneng One-to-One Department to study mathematics when he was in the sixth grade. One-on-one teachers in New Oriental teach more profound things than in school, and children are exposed to many things that they can't learn in school. At first, it was difficult, but after a few weeks, the child felt much better. It is beneficial for children to learn something deeper than school and help them transition from primary school to junior high school.