Is Fuxian dialect the northern Shaanxi dialect?
No, according to Baba.com's inquiry, the five counties in Yan 'an, namely Fuxian, Yichuan, Luochuan, Huanglong and Huangling, belong to Guanzhong dialect, not northern Shaanxi dialect. To the south of the northern Shaanxi dialect area are Fuxian and Yichuan, to the west are Dingbian and Huachi, to the north is Dongsheng, and to the east are Baode and Du Jun (Liulin County) east of the Yellow River.