Which dialect in Xianning, Hubei belongs to the whole country?

Chinese dialects can be divided into seven categories. Xianning belongs to the southeast of Hubei, which is obviously different from the whole Hubei dialect. Xianning dialect is basically incomprehensible in Hubei outside Xianning, because Xianning dialect belongs to Gan dialect, which is Jiangxi dialect. According to historical records, Xianning people migrated from Jiangxi in ancient times, so Xianning dialect is very different from other dialects in Hubei!