The introduction said that during the Spring Festival in 2000, Ah Heng received a delivery. This express delivery might be one of the main plots in " Wen Ruyan of Ten-Year First Grade ". In the novel, Ah Heng received a letter from Yan Xi, which reminded her of the time she spent with Yan Xi. In this story, the relationship between Ah Heng and Yan Xi is an important theme. They have experienced many challenges and difficulties, but in the end, they overcome these obstacles and establish a deep relationship. This express delivery might also be to strengthen the theme and let the readers have a deeper understanding of the relationship between Ah Heng and Yan Xi.