 The rhythmic and tonal pattern of the ci ( <unk> ) form of poetry , an important part of Song dynasty poetry , uses a set of poetic meters and is based upon certain definitive musical song tunes . The specific origin of these various original tunes and musical modes is not known , but the influence of Liao dynasty lyrics both directly and indirectly through the music and lyrics of the Jurchen Jin dynasty appears likely . At least one Han Chinese source considered the Liao ( and Jurchen ) music to be the vigorous and powerful music of horse @-@ mounted warriors , diffused through border warfare . 
