What are the writing characteristics of "Fu Qin Yin"?

This poem is magnificent in structure and accurate in layout, all of which are flashbacks. There are several episodes and flashbacks in flashbacks, and the context is clear. Typical scenes and plots are selected, which are magnificent and full of painting, and the description of some parts is nuanced, ups and downs and strong sense of hierarchy. The time span is large, and the narrative time is from 880 to 883, which is as long as four years. Vast, delicate and not cumbersome, smooth and stretched. It marks the development of narrative art in China's poems.