Divorce is often related to willow trees. The first reason is that there is an isomorphic relationship between them. The swaying figure of weak willow branches can convey the feeling of "reluctant to part" when relatives and friends leave. "Folding willows in a long pavilion" is often a symbol of parting. Liu's image is the product of historical and cultural accumulation, with special connotation, restricted and regulated by national cultural psychology, and has certain stipulation.