After presenting several significations of xing developed by four contemporary theorists (Chen Shixiang, Yie Jiaying, Xu Fuiguan, Jiang Nianfeng), this essay is devoted to suggesting another interpretation more appropriate to a modem viewpoint. Focusing on the operation of the creative dimension, as appropriate to poetry, the notion of xing, from three thousand years ago, distinguishes itself by its particular "stimulus-response" construction, from which derives the vigorous effect of its language. After surveying the various styles of poets in Taiwan, the essay considers Xia Yu as the most representative of this language phenomenon. (Thus, she is also widely recognized as the central figure in post-modem writing, providing a formative influence for the younger generation.) Following the hierarchy of the poet's artistic concepts, established over four volumes, the essay attempts three conclusions about the nature of linguistic signs from the poetry of Xia Yu: 1. Obliteration of any sense of metaphor abundantly achieved by her previous grand masters. She revives this literary tradition from the Classic of Poetry: "realization of the inner image in ordinary, touchable objects." 2. Elements of objects in her poetry are intimately united; each recalls the other, becoming themselves dimensions of the multiplicity. 3. A fresh fabric of the notion xing has been reinvented. Its "stimulus-response" structure implicates a hyper-adaptive reality that is constantly in moving. On liberation from within the labyrinth of Xia Yu's poetry, the ancient notion of xing is transformed as a novel aesthetic view for post-modem criticism.