The development of language is as simple as possible to facilitate communication. The population speaking northern dialect is the largest, but there is little difference to the north of the Yangtze River, including southwest mandarin, northwest mandarin and northern dialect. People in North China, East China and Northeast China all speak northern dialects, while Hebei County, Beijing dialect and Harbin dialect in North China are the simplest and most convenient, so they are designated as national languages, that is, Putonghua. All originated from Nanjing Mandarin. Who told the Zhu Ming Dynasty that the national language was Nanjing Mandarin, and then Judy and even the Qing Dynasty made Beijing their capital? Naturally, Mandarin, which evolved later, is the most widely circulated.

However, Cantonese is too far away from the power center, too complicated, and too few people speak it, which is not conducive to communication.