Gaohu is a high-pitched stringed instrument.

In the band, the gaohu is notated according to the actual pitch, and the tuning is a pure fifth or a pure fourth higher than the erhu, that is, the tuning is a (1), e (2) or g (1), d (2). The commonly used range is from a1 (g1) to b3 (a3). Sounds above b3 (a3) ??are tense and sharp in pronunciation and should not be used frequently. In the commonly used range, its tone is bright and clear, suitable for playing beautiful, lyrical, beautiful and lively tunes, and often forms an octave with the erhu.

Gaohu is the collective name for "treble erhu", which is adapted from the erhu. The emergence of Gaohu is closely related to Guangdong music, a Chinese folk music. It is also closely related to Cantonese opera in Guangdong. It was once used as the main instrument of Cantonese opera accompaniment. Therefore, Gaohu is often called "Cantonese Hu".