Gaohu is a high-pitched stringed instrument. Its shape, structure, bowing technique, and playing symbols are the same as those of the erhu, except that the qin barrel (resonance box) is slightly smaller than that of the erhu.  Gaohu is a collective name for "high-pitched erhu", which is restructured on the basis of erhu. The production of gaohu is closely related to Guangdong...