What does the poem Peacock Flying Southeast have to do with Peacock? There is no mention of peacock in it? Very peacock. Is it okay? Who can help me explain?

In Han Yuefu, the pain of separation between husband and wife is engraved, and birds are often lost. At the beginning of this poem, "Peacock flies southeast, drifting in five miles" symbolizes the love and attachment of Jiao Zhongqing and Liu Lanzhi by writing that Peacock flies southeast but never leaves.

At the end, I wrote an ideal ending with a beautiful legend, which not only symbolizes the immortal love of Jiao Zhongqing and Liu Lanzhi, but also symbolizes their eternal grief and accusation.