Why is Linzhou dialect the same as Cixian dialect?

Linzhou dialect, like Cixian dialect, belongs to Jin dialect. According to relevant data, according to the geographical division of Chinese dialects, Linzhou dialect and Cixian dialect belong to the same language, and we will think that Linzhou dialect in Henan is very similar to Cixian dialect in Hebei. The so-called dialect is a dialect that is different from the official standard language and is only used in one area.