The content of the dialogue generated in the question should be closely related to the life world. Many famous philosophers, such as Husserl, Heidegger, Habermas, etc., all turned to the life world in varying degrees from their respective research fields. "Returning to the life world" is a general trend, and it is also the basic trend of primary school mathematics. The life world is integral to students, and it has significant meaning. On the one hand, the life world is the main source of all kinds of knowledge materials for students, and it is the foundation of the scientific world. The effectiveness of educational activities depends to a large extent on the breadth and depth of the student's own practice in the life world, as well as his perception and understanding of it. On the other hand, the life world can help students establish life beliefs and acquire developmental drives. If separated from the life world, students' true understanding of life, life and the world cannot be formed.