This poem takes the scenery of "snow" as the clue of lyrical development. "Snow" * * * appears four times, forming four pictures: the first time-bidding farewell to the "flying snow" before, showing the "bleak picture of flying snow in August" to readers; The second time-when the China army bought a farewell dinner, "it snowed one after another", presenting a "strange cold picture of the farewell dinner in the military camp" in front of readers; The third time-"Snow Mountain Road when Parting" presents the "melancholy picture of East Gate Parting" to readers; The fourth time-after the farewell, "only his hoofprint was left", presenting readers with "homesickness in the snow".
. "White hair" is caused by worry, "scratching" is an action to relieve worry, and "shorter" indicates the degree of worry. In this way, in addition to the pain of national destruction, sighing and aging will add a layer of sadness.