When Cheng Jiahan learned that the two were not in the same high school, she sent a message to Jiang Zhe, "Actually, I don't regard you as a sister. I can do math homework and think about math problems myself. My high school entrance exam goal is... To fill in the questions according to yours." Jiang Zhe replied, "I know it all." After seeing it, Cheng Jiahan cursed in her heart, "You know what the hell, why are you so stupid?"
Purpose: To express one's regrets