What is the connection between azaleas and cuckoo birds?

The use of the cuckoo bird together strengthens the image of the cuckoo bird's "sadness", and the two sorrows are combined into one, adding to the artistic appeal of the poem. For example, "Seeing Rhododendrons in Xuancheng" by Li Bai of the Tang Dynasty is a typical example of this type of work: Zigui birds were heard in the Shu Kingdom, and azaleas were also seen in Xuancheng. One cry, one ileum, one break, three springs and three months of memories of Sanba. The relationship between the azalea and the cuckoo bird exaggerates the strong homesickness, which is sad and strong. Han Xie of the Tang Dynasty wrote in "The Rhododendron Branch at Jingxing Temple is extremely colorful": There is a garden full of red azaleas, and there are clusters of azaleas on the ground. The soul of Shu has not returned to shed blood, so it should only be shed in this cluster. "Sending Azaleas" written by Wu Rong of the Tang Dynasty: The spring reds are beginning to fade and the autumn reds are beginning to fade, and the people enter the Chu Palace after the country is in ruins. It should be that Shu complained endlessly, and even complained to the west wind based on his color. In "Smell the Cuckoo" written by Emperor Yongtao of the Tang Dynasty, the green pole is slightly exposed and the moon is exquisite, and Xie Bao is sad and crying alone in the wind. You can already smell blood dripping from high places, and a few pomegranate branches turn red overnight. You can also find many examples of such poems. In the poems, when the azalea appears alone, it usually symbolizes beauty and enthusiasm. When it appears together with the cuckoo bird, it echoes with the cuckoo bird and expresses sadness together. , this is what poetry lovers and creators need to grasp.