There could be many explanations for why many of the protagonists in the novel had the surname Su. The following are some possible reasons: The surname Su is one of the Han surnames with a long history that can be traced back to the Spring and Autumn Period. In Chinese culture, surnames are important identities, so some novels may use the protagonist's surname as an important background or setting to express the story background and worldview. The reason why the surname Su is widely used in novels is probably because the characters with the surname Su are more common in online novels, TV dramas, movies, and other cultural works, so they are easily familiar and loved by readers and audiences. In addition, characters with the surname Su were also given unique personality characteristics and charm in some novels, so it was easier to shape them into the main characters of novels. 3. The surname of the protagonist in the novel could also be related to the author or writing style. Some authors might use the surname Su as the protagonist's surname to express the protagonist's ordinary, ordinary, and tenacious qualities, making it easier for readers to resonate and emotionally invest in him. At the same time, some authors might use the surname Su to combine with other surnames to create a more unique combination of the protagonist's surnames to enhance the uniqueness and appeal of the novel. There were many reasons why the protagonist's surname was Su. It might involve history, culture, art, writing style, and many other aspects.