Nashi native music is thousands of years old, and is presently being energetically kept alive by He Wen Guang, who writes and performs Nashi music in both traditional and modern styles. Another form of music, labelled Nashi ancient music by its supporters, is about 500 years old and came from Nanjing traders who were encouraged by various emperors to trade with, live in and inter-marry with the Western tribes as a way of improving controls over the unruly western regions abutting Han China. Along with the Han music are included literary lyrics, poetic topics, and musical styles which are understood to derive from themes prevalent in the Tang, Song, and Yuan dynasties. This music was played as a living tradition by the Nashi long after it was all but lost in the rest of Han China. There are three main styles, relating to the location of the music playing groups: Baisha, Dongjing, and Huangjing, all using traditional Chinese instruments.