Fortune telling in Quanzhou dialect

Why do quanzhou county people in Guangxi have the same accent as Xiangxi people in Hunan?

Quanzhou is located in the Xiang-Gui Corridor, which is called the North Gate of Guangxi. Ancient times were under the jurisdiction of Hunan for a long time, and it was only in the twenty-seventh year of Ming Hongwu that it was placed in Guilin, Guangxi. The dialect is mainly Beiping dialect in Guangxi, and the locals call it Quanzhou dialect. Some dialect researchers belong to Xiang dialect, and some belong to Guiliu dialect, the southwest mandarin, which is similar to the adjacent Yongzhou accent and may be different from Xiangxi.