On hongwu's historical expulsion.

In the war-torn environment at the end of Yuan Dynasty, Chongming Island, a county belonging to Yangzhou Prefecture, was preserved because it was blocked by the Yangtze River and was not attacked by war. Chongming Island is located at the mouth of the Yangtze River. The beach area is small, and the waterway changes from time to time, so as soon as the war stops, the population will move out one after another. In the 25th year of Hongwu (1392), more than 2,000 households on Chongming Island moved to Jiangbei, and these residents lived across the river. Haimen county. After that, 500 landless residents moved to Kunshan County, Suzhou. In fact, since the early years of Hongwu, there have been immigration activities in Chongming Island, but the difference is the change of its administrative district. Chongming Island was under the jurisdiction of Jiangbei before the seventh year of Hongwu (1374), and it belonged to Kunshan County after the twenty-fifth year of Hongwu (1392). The rest are immigrants. According to the existing local chronicles and genealogy data, according to the folklore in northern Jiangsu, their ancestors migrated from Nagato, Suzhou in the early Ming Dynasty. Most of the ancestors of Taixing residents moved in at the end of the Yuan Dynasty. One surname in Xinghua County came from Suzhou, and Hongwu moved in Xinghua in the early years. Other noble families in Baoying, Jiangdu and other counties thought that their ancestors had moved in from Suzhou. It is a special phenomenon that immigrants in northern Jiangsu generally have. From the ninth year to the twenty-sixth year of Hongwu (1376- 1393), Yangzhou immigrants moved in one after another, with a total of140,000 new immigrants, originally from southern Jiangsu, northern Zhejiang and Jiangxi. In the 26th year of Hongwu (1393), Yangzhou Prefecture was occupied. Immigrants from Suzhou, southern Jiangsu and northern Zhejiang account for half of the total immigrant population, while immigrants from Jiangxi and Huizhou each account for a quarter. Immigrants from Huai 'an Prefecture also have the idea of moving in from Suzhou, such as the surnames of, Tang, Wu and Zhu in Siyang County, that is, they moved in from Dongting Mountain (East and West Dongting Mountain in Taihu Lake), Kunshan, Jurong and Wuxian County in Suzhou in the early Ming Dynasty, so the county still has relevant origins. In the early Ming Dynasty, Suzhou immigrants did not seem to reach the north of Huai 'an Prefecture, so in Muyang and Haizhou, there was another saying that "Hongwu drove away". "Hongwu drove away" is transformed from the homonym of "Red fly drove away" and "Hong Jun drove away". Although one explanation for the "red fly" is that the epidemic of diseases caused by the war in the late Yuan Dynasty left an unforgettable impression on immigrants. However, another explanation is the sigh left by the ancestors of immigrants who were driven away by Liang Wudi. In addition, some northern immigrants, especially those from Hongdong County, Shanxi Province, moved to Huai 'an Prefecture. Southeast Shandong was originally one of the areas where Shanxi immigrants moved in, and then moved south into northern Jiangsu, so some of the immigrants in northern Jiangsu were descendants of Shanxi immigrants. These immigrants from Hongdong County, Shanxi Province are very frequent. Traces of it can be found from the previous dynasties and even the whole Ming Dynasty. During the Hongwu period, Jiangnan immigrants to Jiangbei took the Yellow River as the northern boundary, and Jiangnan immigrants crossed the river to the north, which occurred after the middle of the Ming Dynasty.