How did Henan people from Anji and Changxing migrate? What are the historical records?

At that time, 90% people in Anji were slaughtered. During the turmoil of the Taiping Heavenly Kingdom, many people moved from Hubei and Henan during the Guangxu period. I once paid attention to this problem. At that time, I did some amateur research on Anji dialect. When learning dialects, you will find that this place in Anji Changxing is very special (check the dialect distribution map, there are many scattered points here, and there are small pieces of Taihu Lake, and the official language is basically some officials from Hubei, Henan and Anhui). Henan dialect is mainly distributed in the northwest of Anji, that is, at the junction with Changxing. There are Hubei and Anqing dialects in the southwest and Wu dialect areas in the southeast, but not necessarily. As I live in the southwest, it is really a Wu dialect film (one in the next village is Anqing dialect and the other is Hubei Mandarin area). It's weird anyway. It seems that a doctoral student in beijing language and culture university (specifically forgot) wrote a paper and came to Anjiha in person, but the relevant literature is still a bit. . . . . . . I have a distribution map here. I can send it to you if you want. .....