What role does the poem "Farewell to Tian Shuji Wu's Home" in Bai Xuege play in describing the cold life in the military camp after the snow?

Describe the hardships of military life, and the hardships of border guards come from Baidu Encyclopedia.

. The influence of "white snow" intruded into the room. If it is in the south, it will explode if you put on the fox fur, but here the fox fur is not warm, and even the soft brocade is only thin. An edge general who can "break five-quarter arc" can't open an angle bow; Usually it is "iron armor that stays up all night", but at this time it is "iron clothes are hard to protect". Two sentences and general Duhu (the governor of the town near Duhu) said, understand each other. Some people think that these four sentences show the bitter and cold life of frontier soldiers, but from the theme of Bai Xuege, it is mainly through people's feelings and various things that southerners think are abnormal to write about the strange cold weather and the power of snow.