The Fu about music during the Wei and Jin dynasties occupies an important position in terms of Fu about things. They are unprecedentedly prosperous at that time. The writers attach great importance to the fashion of clear sound and think that this is important for harmony, for it demonstrates a graceful and flying up feature and also presents a flexible, elusive and elegant charm. The clear sound is not isolated in producing great attraction of the writers at that time. The clear and turbid sounds are supplementary to each other, and bring about an artistic feeling. For the writers, the main features about the clear sound are accorded with their temperament and interest during that time, so they hold the views that they can do well between clear and turbid sounds so as to show the beauty of the clear sound.