This poem is selected from "Farewell to Tian Shuji Wu's Home" in Bai Xuege, the masterpiece of Frontier fortress, and was written in his second frontier fortress stage. The north wind swept across the earth, white grass broke branches, and heavy snow floated in the sky in northern Saibei in August. Suddenly, the spring breeze seems to blow overnight, and thousands of white pears are in full bloom. Snowflakes floated into the bead curtain and wet the curtain. I didn't feel warm when I put on fox skin, and the quilt made of brocade felt thin. Even the general and Du Hu couldn't pull out the bow, and they all felt that the iron clothes were too cold to put on.