青年都留在了学校
[qīng nián dōu liú zài le xué xiào]
This name translates to 'the youth all stayed in school'. It metaphorically expresses a feeling of nostalgia or longing for youthful times associated with schooling. By saying youth stays in the school, it indicates those youthful memories are frozen in time, implying a bittersweet reminiscence about the past.