Where does "Jiangdong" often refer to?

The area south of the Yangtze River between Wuhu and Nanjing

Geographical concept

Because the Yangtze River flows in the northeast of Anhui Province, the east, west and left are determined by this section of the river. The areas referred to are different in size, which can refer to Nanjing area or the south bank of the lower reaches of the Yangtze River below Wuhu in Anhui Province, that is, parts of southern Jiangsu, central Zhejiang and southern Anhui are called Jiangdong. "Historical Records of Xiang Yu": "I crossed the river with eight cadres of Jiangdong children to advance westward. Today, no one has returned, and my brothers and sisters in Jiangdong have pity on me. How can I see it! " Li Qingzhao said in a poem: "I miss Xiang Yu so far and refuse to cross Jiangdong." Battle of Red Cliffs: "I am also a father and brother, leaving Jiangdong." The ancients left east and west right, so Jiangdong was also called Jiangzuo, and now Jiangxi Province is called Jiangyou.