楚水吴山

Explanation: Water Chu, Wu mountain. Refers to the ancient Wu and Chu the two respective regions. Used to refer to after the Yangtze River area. 　　Source: Tang Bai "South sent the North off by the book by sending teeth Xuzhou brother": "Garden of monopoly Yuhe such as water, Wushan Chu Wan Yu. 　　Examples: Send Wye ~, the proud post of Tang evil. (Song Lu, "Saddle catchy return trips accounted for")