Why is Fujian called Minnan? Does anyone know?

Because there are two prefectures, Fuzhou and Jianzhou, they are named after their first names.

After the Zhou Dynasty, the name of this area of ??water and soil has undergone changes.

In the 21st year of Kaiyuan of the Tang Dynasty (733), Fujian economic envoys began to appear in Fujian. Fujian has been called "Min" since ancient times, and the meaning of "Min" is that there is a snake inside the door.