Dong nationality is a long-history ethnic group who live among the mountains of Guizhou plateau without their own written language.They narrate their history, express amorous feeling, soothe their spirits and educate their menbers with songs. They have created Grand Song that is like a magic music epic and famed the world as the sound of nature. The Grand Song, the multi-vocal-parts melody without instrument accompaniment and conduction, has shocked millions of people from countries all over the world and has been placed on the list of cultural heritage of human being.