To write a heart-wrenching novel, you can refer to the following techniques: 1. Increase emotional conflict: Let the reader feel the emotional conflict between the characters, such as love but not love, misunderstanding, loss of relatives and friends, etc. These emotional conflicts will make the reader more involved in the story and feel more heart-wrenching. 2. Description of Tragic Experiences: Let the character experience some tragic experiences such as losing a loved one, being betrayed, suffering from a terminal illness, etc. These experiences will make the reader more sympathetic and more heart-wrenching. 3. Use rhetorical devices such as metaphor, personification, and parallel to strengthen emotional expression so that readers are more easily attracted to the plot. 4. Set up suspense: Set up some suspense at the end of the story to make the reader want to continue reading and learn more information, which will be more heartbreaking. 5. Use contrast: Through the contrast between the characters and the external environment, it can strengthen the emotional expression and torture effect. The degree of heartbreak in a novel depended on the author's emotional expression and plot design. It required careful thought and practice to write an unforgettable plot.