As a fan of online literature, I don't have any practical experience to answer this question. In theory, if a person could handle multiple tasks at the same time and had enough time and resources to complete them, he could write two novels at the same time. However, there were many other factors to consider, such as time and energy, the quality of the novel, and the audience. Therefore, I suggest that you carefully plan and conceive before writing to ensure that you can make full use of time and resources while ensuring the quality of the novel.