Rao Xueman's " Sweet and Sour " was a well-known online literary work that told a story about youth, love, and growth. The plot and character creation of the novel were both good, but it also focused on the exploration and reflection of human nature. In terms of plot," Sweet and Sour " told the story of two girls from different worlds who met, got to know each other, fell in love, and grew up and explored together. Through the protagonist's inner monologue and thoughts, the author shows a deep understanding and insight into puberty, and also reveals the contradictions and complexity of human nature. In the aspect of character creation, the characters in Sweet and Sour all had distinct personalities and characteristics, and their plump images left a deep impression on people. Among them, the protagonists, Lin Jiaxin and Meng Jingxian, were the two most representative characters. Lin Jiaxin had an independent personality and pursued Meng Jingxian, who was a kind, sensitive and emotional girl. The emotional entanglement and growth process between them was also a highlight of 'Sweet and Sour'. In terms of literary value, Rao Xueman's " Sweet and Sour " was an excellent online literary work. It had a deep insight into human nature and thought about the twists and turns of the plot. It was fascinating and also had a high literary value. This work not only has a certain reading value, but also has a certain cultural inheritance significance. Rao Xueman's " Sweet and Sour " was a highly recommended online literary work. It presented a story about youth, love, and growth through plot and character creation. At the same time, it also focused on the exploration and reflection of human nature.