A childhood sweetheart referred to two people who met, knew, and loved each other as they grew up. They grew up together, supported each other, and accompanied each other. In novels, this kind of plot was often used to describe the pure feelings between two people, as well as the tacit understanding and trust between them. There were many novels about childhood sweethearts, such as " Startling Step by Step "," Hua Qian Gu ", and " Chu Qiao's Biography ". The love and growth experiences of the protagonists in these novels were full of touching emotions and stories. The plot of childhood sweethearts was also often used to portray the characters to enhance the appeal and legibility of the novel.