The math test paper was issued, and the three boys sitting in the back row got zero scores. The reason was that they were not serious about their time and could not do a single question on the test paper.
 Two of them looked downcast and looked very worried, thinking about how they would be criticized by the parents at home after returning home. And one person looked at the 0 on his test paper, he was clearly happy, and hurriedly folded the test paper and put it back in his schoolbag.
 The other two were curious and asked: “Why don’t you worry, don’t your family members beat you and scold you when you see your zero score in the test?”
 The man pursed his mouth, and put his hands across his chest, looking very proud, and said: “Mine is not zero.”
“Huh?” Hearing this man said that his score was not zero, the other two looked at each other, a little surprised, “We obviously saw a big zero written on your test paper, why is it not zero? “
But when the person heard this, he took out his own test paper from his schoolbag and put it on the table. Then he put the two test papers aside, pointing to their zeros and said seriously: ” You see, the circle drawn on your test paper is so round that there is no gap at all. Yours is the real zero score. Look at my test paper again, there is a gap on it, and it looks like 0, so mine It’s not a zero score, so why worry that my family will beat and scold me?”
 After the other two looked at each other, they looked at the shocking student with a look of astonishment.