This positive significance is mainly manifested in two aspects: first, Yu Dafu's decadence and the specific performance of this decadence-sexual repression, not only his own feelings, but also as a social problem. This kind of decadence and sexual depression was the general mentality of young people at that time, and Yu Dafu concentrated on this kind of "disease of the times" with his own feelings, thus bringing a sharp problem to history and society, so he was positive. Secondly, Yu Dafu's sentimentality and decadence contain a conscious challenge to the old feudal morality. As Guo Moruo said in Yu Dafu, "His bold self-exposure is a false storm of lightning to the literati hidden under the armor of thousands of years, which makes some fake scholars and fake talents angry." Why? It is precisely because of this clear truth that they feel the difficulty of fraud. "

Yu Dafu advocated that "literary works are autobiographical biographies of writers" in literary creation. Therefore, he often takes his personal life experience as the material of his novels and essays, and makes an undisguised outline of his thoughts, feelings, personality and life experiences in his works. The masterpiece of Yu Dafu's autobiographical novels is Sinking, in which Yu Dafu boldly describes the sex and psychology of men and women, and at the same time sends out "Motherland, Motherland! My death is all because of you! " "You're getting rich! Be strong! " You still have many children suffering there. As soon as this autobiographical novel was published, it immediately caused an uproar in the literary world of China. The younger generation, who was baptized by the May 4th Movement, found something that collided with their hearts from his novels, and those literati who dared not break with feudal morality also pointed their finger directly at Yu Dafu. In his autobiographical novels, Yu Dafu not only reflects the depression and depression of the lower intellectuals, but also reflects the sufferings of the people at the bottom of society from the perspective of intellectuals, showing sympathy and concern for the working people, such as "A Night of Spring Breeze and Burden Drunk".