There were many novels of this genre, and the more classic ones were " Startling Step by Step "," Hua Qian Gu ", and " Chu Qiao's Biography ". In novels where the male and female protagonists traveled through time together because of a car accident, they usually involved elements such as identity transformation, emotional entanglement, and historical replaying after traveling through time. When traveling to different worlds, one would meet people with different personalities and experiences. The male protagonist would usually gradually discover the true personality of the female protagonist and develop emotional entanglements. The female protagonist might gradually develop a good impression of the male protagonist in this process. This type of novel usually involved a lot of complicated plots and character relationships. It required the reader to have a certain imagination and understanding to fully appreciate the essence of it.