Three or five nights, the bright moon half-wall, the osmanthus shadow dappled, the wind shifts the shadow movement, Shan Shan is lovely. Coral" is used as a metaphor for precious things or talents, such as "iron net Shan Shan" (a metaphor for searching for precious things or talents).
[Shanshan] a. describes the sound of clothes and dresses; b. the appearance of swaying.