The legend of Hongyan originated in the Han Dynasty and was first recorded in Hanshu. It is said that the messenger of the Han Dynasty sent Hongyan to deliver letters to Su Wu. Hongyan refers to a messenger, or letter. After this story spread, people used Hongyan to send letters to refer to messengers or messengers, and this allusion will be quoted in many poems.
Early poems with Hongyan as their book allusion.
The earliest poem about Hongyan's biography came from Qi Liang in the Southern and Northern Dynasties. He Xun, a poet in Qi and Liang Dynasties, has a poem "Learning Ancient Poems".
When Emperor Wu of the Han Dynasty sent messengers to Dayue's home, Zhang Qian, the prince of Bo, was detained by Xiongnu halfway and left home for thirteen years. Later, he was ordered to send an ambassador to Wusun to seal the princes. At the end of the poem, I wrote: I want to go to the forest to find geese. I saw pinglingtong.
These two sentences obviously use the allusions of Hongyan's biography in Han Dynasty. Shanglinyan refers to the goose with letters shot by Emperor Zhao of Han Dynasty in Shanglinyuan, and Pingling Tung refers to the tung tree in Emperor Zhao's cemetery (Pingling).