San Yan became a classic in the history of Chinese literature in the Ming Dynasty with its unique narrative techniques and literary style. Feng Menglong's literary thoughts were mainly expressed in the following aspects: 1. Reflecting social reality: San Yan described the dark side of society and the weaknesses of human nature, such as official corruption, the gap between the rich and the poor, social injustice, etc., reflecting the real problems of society at that time. 2. emphasize the complexity of human nature: the protagonists in San Yan have different personalities and characteristics, and the relationships between them are also complicated. Through their stories, the author reveals the complexity of human nature and makes people realize that human beings are not simply black and white, but have many faces and complexity. 3. Advocates satire and criticism: In San Yan, the author reveals the bad phenomena in society and the weaknesses of human nature through satire and criticism, advocating that people should be brave enough to expose and criticize reality. 4. Pay attention to the beauty of literary form: In San Yan, the author not only pays attention to the narration of the story, but also pays attention to the beauty of literary form, such as the use of language and the creation of characters. This shows the author's superb skills in the beauty of literary form. San Yan reflected Feng Menglong's literary thoughts in the narration of the plot, the complexity of human nature, the reflection of social reality, the emphasis on the complexity of human nature, and the emphasis on the beauty of literary form.