Knowledge comes from hard work, and any achievement is the result of hard work. -Soong Ching Ling

Solving the problem of language evolution is as difficult as solving the mystery of species evolution; The evolution of language is not only a social phenomenon, but also a natural phenomenon, and it is also the result of human psychological development and historical and cultural evolution. Because the origin and change of language has its internal causes and external influences, it increases the complexity of language evolution. Zhou Haizhong