Gaoyi is a minor character who passes by to inform Mu Mian's family about the school roof leak. He is likely a neighbor or classmate, serving as a messenger. His appearance is brief but functional, advancing the plot by explaining Mu Mian's absence from school. He is described as 'passed by earlier,' indicating he is familiar with the area. His message highlights the poor condition of school facilities, adding context to the setting. He may be a peer of Mu Mian, though not explicitly stated. He represents the community's interconnectedness, where news spreads quickly.
