Why does Nanchong dialect sound atypical at all?

Nanchong people don't speak so many Chinese syllables. The biggest feature is that it retains the entering tone in ancient Chinese, which is not found in Putonghua. Nanchong dialect, also known as Nanchong dialect, belongs to Chengdu-Chongqing dialect of Sichuan dialect (a general term for the integration of Bashu dialect and immigrant dialect). Compared with the softness of Chengdu dialect and the hardness of Chongqing dialect, Nanchong dialect has a moderate tone.