The " Time Cloak " was a common theme and concept in novels, usually found in science fiction or fantasy novels. Its meaning and function mainly depended on the plot and setting of the novel. In some novels, a " time book coat " referred to an item that could travel through time, allowing you to wear it to go back to the past or the future. This topic is often used to explore the possibility and feasibility of time travel, as well as to deepen the understanding of the passage of time and human history. The Time Cloak could also be used as a suspense and plot setting to make the readers expect the protagonist to find or wear the Time Cloak to explore a broader space-time domain or change the direction of history. In novels, the " Time Cloak " was a mysterious power that symbolized time and space. It could arouse the curiosity and desire of the readers, and at the same time, it could promote the development of the story.