Zigui is a cuckoo. Wu Rong, a poet in the late Tang Dynasty, wrote a poem "Zigui", which expressed his sadness that the cuckoo turned into a soul after the death of Du Yu, the emperor of Shu.
In the scenery, Huayang falls to the ground and cries, taking the wandering Huayang alone, calling for "it is better to go home", that is, it contains the feeling of loneliness and the hate of parting, which conforms to the situation at that time and melts into the scenery.