What are the manifestations of folk songs in Han Dynasty?

Folk songs in the Han Dynasty also developed in the form of performance. Early folk songs were just oratorios, called "disciple songs" or "ballads". Later, with the help of people claiming to be "bear songs." Finally, it developed into a "harmony song" accompanied by stringed instruments such as sheng, flute, harp and harp. During the development of Song Xianghe, a new form of singing and dancing-"Xianghe Daqu" was produced by the combination of professional musicians and dance. Xianghe Daqu has a trilogy of introduction, middle and end, which is called "erotic disorder (or tendency)". There are records of Xiang and Daqu, such as Luofu and Xiamen.