天低吴楚，眼空无物

Explanation: Wu Chu: refers to the Yangtze River. Originally referred to the board of Nanjing city, at first glance, the farther the more I heavens, in addition to see the heavens, the emptiness of all. Analogy is also seen nothing. 　　Source: Element Sa are thorns "Stories of the Tang Stone City," the word Stone City, the look on low-Wu Chu, eyes empty properties. "