Where is the Minnan language, that is to say, which cities in China speak Minnan language?

Distributed in southern Fujian, Putian, Xiamen, Quanzhou and Zhangzhou. Taiwan Province province. Southeast Asia, such as overseas Chinese in the Philippines, some overseas Chinese in Singapore and Malaysia. Minnan dialect is said to have originated in the Luoshui Valley of the Yellow River, moved to southern Fujian during the Western Jin, Tang and Northern Song Dynasties, and originated in Quanzhou, Fujian. Now they are mainly distributed in northeastern Fujian, southeastern Zhejiang, Chaoshan, Huizhou, Hailufeng, Pearl River Delta, Leizhou Peninsula, Hainan Island and most Chinese-inhabited areas in Southeast Asia, as well as southern Fujian and Taiwan Province Province.

Extended data:

Many Chinese dialects have different pronunciations (or different pronunciations), but they are far less abundant than Minnan dialect. Luo Changpei, a linguist, has roughly counted 3758 Chinese characters included in the vocabulary of dialect survey in Xiamen Dialect Research, of which 1529 have different pronunciations, accounting for more than 40.6%. Among Chinese characters with different pronunciations, most of them are read separately, and about 90% of the above 40% belong to it. The rest can be interpreted in many ways.

References:

Baidu encyclopedia-Minnan language