The previous sentence of this poem is the morning crow of the rooster.
This poem comes from Cao Cao's "Winter October". The original text is: Mengdong October, the north wind lingers, the weather is clear, and there is frost and rain. The rooster crows in the morning, the wild geese fly south, the bird of prey lurks, and the bear roosts in its cave. The money is parked, and the harvest is accumulated. The reverse brigade was set up to connect merchants. Fortunately! Sing to express your ambition. This poem expresses the author's emotion and thinking about seasonal changes and natural laws by describing the natural landscape.