Yan an writers experienced a complex process in learning and using the folk language,especially the language of peasants.

Value and suggestions on how to m aster and carry out minority languages in hospitals on national area;

These hypotheses are gronded in the typological variations between the northern and southern Chinese dialects, and are further supported by the data from classical Chinese and minority languages.

The outstanding character of his peotry anthology Yangbianji and Wafuji is artistic expression using folk language.

Through various literary campaigns and trends of thought,20th Century Chinese Literature discovered the sense and value of folk language from a distinct angle,and thus actively advocates the application of folk language in the field of Writers Literature.

The Rising of National Consciousness and the Development of English national Language in the Later Middle Ages;

On the relations between national language, culture and metaphor;

The National Language is the basis to form national music style.

This paper first elaborates the basic theories of LPP and then makes a detailed contrast in LPP between China and the United States in terms of national languages,foreign languages and bilingual education.

Studying national cultures through national languages has great significance not only in deepening the recognition of the cultural features of different languages, but also in revealing the unknown phenomena in various national cultural history, reshaping the overall looks of national cultures and understanding the characteristics in the ways of thinking of different nationalities.