The background of I-san people is living in drought areas and do framing. I-san people’s life quality is quite low, they are poor. However, I-san people tried to find ways to forget their troubles and poverty. Music is a good way to help them. Therefore, I-san music is amusing. In this way, although I-san people is poor, they have happy lives. According to this background can infer that the music style of Pong Lang is in the same way.