The debate over the preservation of wooden and metal coffins is essentially a philosophical dialogue between natural laws and human intervention. Wooden coffins achieve "soul liberation" by conforming to degradation, while metal coffins pursue "eternal existence" through physical isolation. This difference reflects a different understanding of the essence of life and death among humans - whether to accept the natural cycle or resist the passage of time? In the current era where technology and culture are intertwined, innovation in funeral materials may need to go beyond the technical level and return to the ultimate reflection on the dignity of life.