Qiu Si is a homesick poem by Zhang Ji, a famous poet in Tang Dynasty. This poem expresses the depth of homesickness by describing the feelings before and after writing a letter. It is deep and shallow, and there are twists and turns in tenderness. At first glance, it is just a few words, but it has infinite meaning.
Zhang is a man who lived in Luoyang when he wrote this poem. It was autumn, and the autumn wind evoked the poet's loneliness in a foreign land, which made him miss his hometown and relatives, so he wrote this poem.