For typical motif, it has same or similar interval groups in time zone. And interval groups are available in the model of intervals. Although they are not that accurate, it is enough to show key features 4.2.1 Code mode of interval For a note a and a note B, the interval of them equals to b-a If B is higher than a in pitch, the code of the interval is the value of interval. If not, the code of the interval is the minus value of interval 4.2.2 Model of interva In the network of interval. nodes are the intervals and directed edges shows whether they are next to each other in time area. The more the interval sequence appears, the higher weight the edge is Figure 5 Interval Model of menggu Music Figure 6 Interval Model of jiangnan Musicit. For typical motif, it has same or similar interval groups in time zone. And interval groups are available in the model of intervals. Although they are not that accurate, it is enough to show key features. 4.2.1 Code Mode of Interval For a note A and a note B, the interval of them equals to | B-A |. If B is higher than A in pitch, the code of the interval is the value of interval. If not, the code of the interval is the minus value of interval. 4.2.2 Model of Interval In the network of interval, nodes are the intervals and directed edges shows whether they are next to each other in time area. The more the interval sequence appears, the higher weight the edge is. Figure 5 Interval Model of Menggu Music Figure 6 Interval Model of Jiangnan Music