Yu Tan left Ruoxi a bloody book with exquisite handwriting (Yu Tan once said that he could not write). Probably means that although she loves Ruoxi's sisters deeply, she is caught in a dilemma between love and righteousness. Yutan is helpless and can only disappoint Ruoxi. She sacrificed everything for love and expected to lose her life, but "Yutan has no regrets" (this is the last sentence of the letter, which is super touching, and Yutan has more forbearance and necessity than Ruoxi)!