It does have an impact. Every child has his own mathematical talent and his own calculation method. We just need to let him learn simpler methods to calculate and analyze problems. Never let them make nine beads that he doesn't like. Of course, if he likes to learn Jiuzhu, let him learn it. Mathematics has many ways of thinking, so that he can master his own way of thinking. As long as he studies easily and happily, don't put too much pressure on the child, he will be afraid and upset.