It's a big dream in the world, how many times is it cool in autumn? What thoughts and feelings does this poem express?

The poet expressed his feelings about the brevity, impermanence, coldness and hardship of life.

This poem depicts the fragility and brevity of life in concise and powerful language. The poet compares life to a big dream, emphasizing that life is illusory and fleeting. Depiction makes people realize the preciousness and preciousness of life, and also makes people think mercilessly about the passage of time and years. In the poem, "Life is a few degrees cold in autumn" expresses the author's cold feeling about life. Autumn coolness not only refers to the cold season, but also symbolizes the indifference and desolation of life.