Whenever I look at the snow in the south, the plum blossoms and I grow old. The first time I read it in the signature of the person I liked, I understood "er" to mean "you" and felt it was very romantic and beautiful. After reading it a few times, I wanted to know the origin of this sentence, "Whenever I walk with a cane to see the snow in the south, the plum blossoms and I are both white-headed. The plum blossoms are white because of the snow, and I are white because of sorrow. The two complement each other. Chengqu."