Dongdong realizes that his teacher has read it wrong, why does he bring it up? The text Brew

Because Dongdong respects his teacher, Dongdong's teacher has a good lesson, and like a high school student, he can mingle with his classmates. Dongdong loves to learn, he admires his teacher very much, he feels that his teacher has a level, the image is perfect, the teacher reads it wrong, it makes him feel sorry, and he feels the need to bring it up. As to what effect it would have on the teacher and whether his classmates would complain about him, it was not considered at the time. It was actually a heartfelt act of respect for the teacher, just a little presumptuous. Perhaps it would be better to bring it up individually with the teacher after class.