In " To Our Lost Youth ", Zhu Xiaobei was accused of stealing and smashed the store because he thought he was misunderstood and believed that this misunderstanding would not be resolved. Therefore, he decided to take extreme actions to express his dissatisfaction and anger. This behavior reflected the anxiety and helplessness in his heart, as well as his extreme desire for justice and fairness. He tried to prove his innocence by destroying the evidence, and at the same time, he also expressed his protest and dissatisfaction towards being misunderstood and treated unfairly. This behavior was also interpreted in the novel as Zhu Xiaobei's feelings and thoughts about youth and time. He thought that his youth had passed, but misunderstandings and injustice continued to happen, making him feel helpless and lost.