Illiteracy is one of the most intolerable social diseases, the most shameful or, to be more correct, the most unpleasant social phenomenon. -Kalinin

It is as difficult to solve the problem of language evolution as it is to solve the mystery of species evolution; Language evolution is not only a social phenomenon, but also a natural phenomenon, and it is also the result of human mental development and historical and cultural evolution. Because the origin and change of language has its internal reasons and external influences, it increases the complexity of language evolution. -Zhou Haizhong