How to describe the bitter and cold life in the military camp after the snow in the poem "Send the Judge to Beijing"?

The poet wrote about the severe cold after snow, mainly grasping the typical things from the side and constantly changing the angle. From "Pearl venetian blinds in the tent at night, the silk curtain is wet, a fur coat feels cold, and a cotton mat is thin" to "The bow becomes hard and can hardly be pulled" outside the tent during the day, all the iron clothes are cold and hard to wear until "The vast sea is dry", and finally "And our frozen red flag can't fly in the wind" is written outside Yuanmen. Function: Writing about the bitter and cold life of soldiers in the barracks reflects the hardships of the war and the disasters it brought to the people, and at the same time renders a sad atmosphere for the farewell scene.