This article takes the Qianlong Emperor's most favored seventh princess Xiao Yanzi and the bachelor Fu Lun's youngest son Fu Tai as the protagonists to continue the affectionate relationship between the two childhood sweethearts. The two grew up together since childhood, and they have been secretly in love with each other day and night. From being ignorant playmates to being connected, they guard their pure and sincere love amidst the red walls of the palace and the turmoil in the court. The story includes the warm daily life of the royal children, as well as the many tests of status rules and palace disputes. Xiao Yanzi is smart and frank, and Forte is gentle and sincere. The two protect each other and run in both directions. In the ups and downs of the years, the joy of youth turned into a lifelong relationship, composing a sweet, touching, and unforgettable royal love song.