A: The musical structure of Daqu in the Tang Dynasty generally consists of three parts: preface, song and break. Prose is dominated by instrumental music, and the version is an introduction to the rhythm board, which is generally composed of several instrumental music and gradually transits to adagio. Secondly, songs, also known as middle sequence, beat sequence or arrangement, are generally composed of several slow adagio songs with instrumental music, with fixed rhythm and obvious rhythm changes between times. Sometimes there are songs and dances, and sometimes there are only songs and no dances. Lyrics are generally composed of several five-character or seven-character poems, mostly works by famous artists. Then the rhythm changes from slow to fast. Finally, it is broken, also called dancing. Generally, it is played several times repeatedly, and the rhythm of the whole song is gradually accelerated and extremely fast. Mainly dance, accompanied by instrumental music, and sometimes songs. The rhythm and speed changes are extremely complicated, and the atmosphere is warm, which pushes the whole song to a climax and ends. The internal structure, rhythm and speed changes of Tang Daqu are much more complicated than the previous generation of Leqing Daqu.