宋代以来，“吴头楚尾”或“楚尾吴头”乃成为常用的史地名词，但并非确切的史地概念。
Since Song Dynasty ," Chu-Wei Wu-Tou " or " Wu-Tou Chu-Wei " gradually becomes a common historical placename , but still not an accurate historical placename concept .
楚尾吴头