Liao Fei has a doubt on material: Is material just simply material? Does material really have nothing to do with consciousness or anything else? Liao experienced the beauty of lightness in a simple reasoning of Husserl that everything belongs to a whole system. He said, “I’m afraid material is much lighter and more graceful than our imagination.” In the exhibition hall, he inserted a tube on top of a pile of briquette, and then the light turns on.