Mr. Wang became obsessed with Xie Lunyu because he saw an opportunity to improve his own life by leveraging Xie's father's influence. Mr. Wang, who was struggling financially and professionally, believed that befriending Xie's father could lead to a better job or position in his factory. This obsession grew into jealousy and resentment when Xie's father repeatedly refused to help him.
Xie Lunyu was tragically killed by his teacher, Mr. Wang, who had become increasingly resentful after being rejected by Xie's father for a job. In a fit of rage and jealousy, Mr. Wang attacked Xie, hitting him on the head and then stabbing him to death in the school's restroom. The murder was a result of Mr. Wang's deep-seated envy and frustration.
Xie Lunyu's father remained calm and composed when Mr. Wang disrupted the school event by shouting and causing a scene. He did not react angrily but instead coldly stated that Mr. Wang was 'unworthy of being a teacher.' This statement ultimately led to Mr. Wang's dismissal from his teaching position.
Xie Lunyu's death had a profound impact on his classmates and the school community. His classmates were devastated, with many crying uncontrollably when they learned of his death. The school atmosphere became somber, and Xie's empty seat served as a constant reminder of the tragedy. The incident also led to a change in the school's natural science teacher, as Mr. Wang was dismissed.
Mr. Wang confessed to killing Xie Lunyu because he was haunted by the sound of Xie's cries after the murder. The guilt and fear overwhelmed him, leading him to turn himself in to the police. He admitted that his jealousy and resentment towards Xie's privileged life had driven him to commit the heinous act.