The preface of the poem reveals the theme: "noble and humble, virtuous and ignorant, you have to run a career to cherish your life, you are very confused;" Therefore, Chen is extremely painful and inseparable, which is explained by telling God to distinguish. A good gentleman needs his mind. "People, whether noble or stupid, are taking pains to manage and cherish their lives. This practice is really puzzling. So I tried my best to state Yingying's well-meaning words and explain them by telling God's theory of discrimination. People who care about this matter can get universal truth here.