Chen Yu and Xu Huanshan in " Only Thirty " were the main characters in the novel. Their behavior and decisions were influenced by many factors, including personal values, life experiences, family background, and so on. Therefore, their personality and behavior were not determined by a single factor, but a complex system influenced by many factors. In the novel, there were some emotional entanglements between Chen Yu and Xu Huanshan. Their relationship was also affected by society and moral values. Chen Yu had made some mistakes in his marriage, but he finally realized his mistakes through honest communication with Xu Huanshan and self-reflection. He tried his best to correct this self-redemption process, which also showed his firm will and human side. A man with a weak will may be more susceptible to external factors while a straight man of steel may be more stubborn and straightforward, but this does not mean that they are less reliable. Everyone's personality and behavior are influenced by many factors. We should be open-minded about different personalities and behaviors.