It is ugly to be laughed at by classmates.

The child was unaware of his mistake. He criticized me because he thought everyone had painted it. There is an imbalance in his mind, and he also blames the gossip of his classmates for his criticism. He has no concept of right and wrong, and his thoughts are extreme. For the teacher, we should first make him understand that it is wrong to draw on the desk. You can ask him if he paints on the table. Let him realize his mistake first. Since he has made a mistake, he should criticize it. Secondly, it shows that the classmate reported it to prevent him from making mistakes, so he criticized you because you drew it, not because the classmate reported you and other students drew it incorrectly.