Is there any historical background for the formation of Minnan dialect?

The formation of Minnan dialect is mainly due to two waves of immigrants, whose reason is to levy foreigners and avoid chaos.

In the 4th century, Jin people moved to Fujian, forming some elementary Quanzhou dialects.

In the early Tang Dynasty, the fathers of Zheng Chen and Chen Yuanguang settled in Zhangzhou, and Zhangzhou dialect was initially formed.

In the late 9th century, Wang Chao, Wang Shenluan and Wang San ruled Fuzhou and Quanzhou, forming Quanzhou dialect.

Minnan dialect originated in Quanzhou. Mainly distributed in southern Fujian and Taiwan Province Province, it is also widely used in most Chinese communities in northeastern Fujian, southeastern Zhejiang, Chaoshan and Hailufeng areas in Guangdong, Leizhou Peninsula in Guangdong, Hainan Island and Southeast Asia.

The word Minnan has broad and narrow meanings. In a broad sense, it refers to the collection of Minnan language families, and in a narrow sense, it only refers to the Minnan languages of Fujian and Taiwan Province. Scholars in Taiwan Province Province and the West believe that it is a language and belongs to the Chinese language family. In the classification of continental linguistics, it belongs to a kind of Min language in Chinese language family. Minnan dialect has different names in different places. For example, it is usually called Quanzhou dialect, Zhangzhou dialect and Xiamen dialect in Chinese mainland.