Regret for the Past was a classic Chinese novel about the love story between the female lead Ye Fei and the male lead Qin Xianglin. The reasons for the love tragedy in this novel can be analyzed from the following aspects: Ye Fei and Qin Xianglin had different family backgrounds. Ye Fei was a young lady from a scholarly family, while Qin Xianglin was a scholar from a poor family. This kind of relationship would lead to class differences and social status imbalance between the two, making it difficult for the two people to get the other party's recognition and support. 2. Discordant personalities: Ye Fei and Qin Xianglin's personalities were also very different. Ye Fei was independent and proud, and liked to live a free life. Qin Xianglin was more introverted, silent, and not good at expressing his thoughts and feelings. This difference in personality would lead to poor communication and understanding between the two, which would eventually lead to the breakdown of their relationship. 3. The teasing of fate: Ye Fei and Qin Xianglin's relationship was not smooth. Ye Fei lost his mother in an accident. After graduation, Qin Xianglin couldn't be with Ye Fei because of financial difficulties. These unfortunate things made their feelings tested and challenged, and in the end, they did not get a happy ending. 4. Social pressure: In the novel, the social background of Ye Fei and Qin Xianglin also has a certain degree of pressure. Ye Fei's family had high expectations for her and hoped that she could inherit the family business. Qin Xianglin's family did not support him pursuing Ye Fei, thinking that he did not have enough strength and background. This kind of social pressure would cause the relationship between the two to be threatened and challenged, and eventually lead to the breakdown of the relationship. The love tragedy in Regret for the Past was caused by many factors, including family, personality, fate and social pressure. These factors made Ye Fei and Qin Xianglin's relationship road full of challenges and difficulties, and in the end, they did not get a satisfactory ending.