What pass did Yanxing send a feather to Guanzhong yesterday?

What does it mean to visit Guanzhong yesterday in "The Wild Goose flies"? If you mean the exam questions, the answer is Shanhaiguan. Yan Mingxing is the work of Li Bai, a great poet in the Tang Dynasty. This poem eulogizes things, expresses feelings here, depicts the loss of geese, the haggard of frost and snow, and compares the ups and downs of life with Hu Yan's tragic experience, which is based on poetry. The artistic conception of the whole poem is desolate, open and far-reaching, which not only depicts the difficult fate of Hu Yan's life, but also shows her inner world, describes her wandering suffering in the north and south, and expresses the anxiety of ancient literati.