In calligraphy, negative space—the areas around the strokes and characters—is as important as the positive space of the ink itself, and this essay will explore the significance of negative space in caoshu, focusing on how calligraphers use it to create visual balance, rhythm, and expressive depth. This discussion will begin by emphasizing the crucial role of negative space in the overall aesthetic impact of the calligraphic work, exploring how the spaces around strokes are not simply empty, but rather become active elements within the composition. It is important to acknowledge that the negative space is not just empty space but is also an important element.