This type of novel was generally called a time-traveling child-bearing novel. The female protagonist had three children when she time-traveled to ancient times. The male protagonist was the demon king. This kind of novel usually involved time travel, life in ancient society, family, marriage, child-rearing, etc. The plot was full of twists and turns, and there were usually many characters. As one of the main characters, the demon king usually had emotional entanglements with the female protagonist and fought for the custody of the child. Finally, through hard work, he fought for the custody of the child so that the child could grow up in a safe, healthy and happy environment. This type of novel often has a touching story and is very popular with readers.