Parallel lines and learning to think about mathematics, I think learning to think about mathematics is better. Learning while thinking about mathematics has done a good job in teaching staff, teaching methods, curriculum resources, online education and so on. Its excellent teacher team and teaching methods focus on cultivating students' learning interest and learning ability, enriching curriculum resources, and realizing resource sharing, so that students in different regions can receive high-quality online education without running around. Although parallel lines are also good, in contrast, learning and thinking about mathematics is better.