Please infer what Lu Jiachuan experienced not long ago according to the content of the selection. How did you figure it out? Song of Youth (Excerpt)

According to the content of the selection, we can speculate that Lu Jiachuan had experienced something that made him feel sad or painful not long ago. In the novel, Lu Jiachuan was a character full of emotions. He experienced many twists and turns in his life, including losing his loved ones, being betrayed, and so on. These things made him feel pain and sadness. Therefore, we can infer that Lu Jiachuan had recently experienced something that made him feel sad or painful. It might be the past that he was most unwilling to look back on, or it might be the future that he was about to face. From the relationship between Lu Jiachuan and Lin Yang in the novel, we can also infer that Lu Jiachuan had experienced some emotional setbacks and difficulties. He might feel lost and lonely after losing an intimate relationship like Lin Yang. He needed some time to adapt and adjust. Therefore, we can speculate that Lu Jiachuan has recently experienced some emotional setbacks and difficulties. These setbacks may have accumulated over a long period of time, making him feel pain and helplessness.