Su Ruo Yun's Yan Yi Bai novels were so popular for the following reasons: 1. Unique protagonist setting: Su Ruo Yun is a young man with a complicated background who is troubled by family, love and friendship. Yan Yi Bai is Su Ruo Yun's mentor and confidant. The two of them have experienced many difficulties and setbacks together, forming a strong emotional bond. This unique protagonist setting made the story more fascinating and easier for readers to resonate with. 2. Profound emotional description: The emotional entanglement between Su Ruo Yun and Yan Yibai is one of the main plots of the novel. Su Ruo Yun has experienced a lot of pain in the process of growing up, while Yan Yibai is her confidant and supporter. The emotional description between the two is delicate and moving, causing the readers to have a strong emotional resonance. 3. Plot ups and downs: The plot of the novel is full of surprises and surprises. Su Ruo Yun and Yan Yibai's story was full of drama and tension. It was hard for the readers not to immerse themselves in the story. 4. Beautiful language and writing style: The language of the novel is beautiful and fluent, full of poetry and philosophy. The author used many literary and rhetorical devices to make the novel more lively, interesting, and fascinating. To sum up, the unique protagonist setting of Su Ruo Yun's Yan Yi Bai's novel, the deep emotional description, the ups and downs of the plot and the beautiful language and writing style were the main reasons for its popularity.