Source: "North Wind", a Han folk song from Bei in the pre-Qin period. In a poem from "The Book of Songs: Bei Feng", the cold north wind blows fiercely, and heavy snow falls all over the sky. You and I are good friends, let’s run together hand in hand. How can you be soothed and hesitate again? It's an emergency and run away quickly.
The "Preface to Mao's Poems" says: "The North Wind is a thorn in the wind. The Wei Kingdom is also a tyrant, and the people are not close to each other, so they all go away together." From the poem, "We are in the same car." "It seems that the common people generally refer to the general nobles at that time. Fang Yurun believed that it was written by a sage in anticipation of a crisis ("The Original Book of Songs"), while Wang Xianqian believed that it was "a poem written by a sage who met to avoid the place" ("Collection of Yi San Jia Yi"). In fact, the purpose of the poem mentioned in the "Preface to the Poetry" is correct, and it should be a poem reflecting the flight of the nobles.