This poem is about the feeling of missing my hometown on a silent moonlit night. The first two sentences of the poem, It is the illusion of the poet in a moment when he is visiting a foreign country. A man alone in a foreign land, Busy during the day, It can also dilute the sorrow of separation, But in the dead of night, It's hard to avoid waves of missing hometown in my heart. What's more, it's on a moonlit night, What's more, it's a frosty autumn night. "Suspected ground frost" Medium "Doubt" word, It vividly expresses the poet's first awakening from sleep, In a trance, he mistook the cold moonlight in front of the bed for thick frost on the ground. and "frost" Better use of words, It describes the brightness of the moonlight, It also expresses the cold of the season, It also sets off the poet's lonely and desolate feeling of wandering in a foreign land.