The relationship between the formation of Chinese dialects and immigrants, kneeling for the answer, thank you! ! !

In the history of China, the change of dynasties is historic, and the history of war is indispensable. At the same time, when the world is at peace, wars in border areas are hard to be frequent, which will inevitably lead to immigration. China's vast territory also makes China's dialects diversified, and immigrants inevitably promote the exchange of dialects. Different dialects are mixed together, and after a long period of evolution and mixing, various emerging dialects have been formed.