Zhonghu (two string viola)

This middle hu is an alto erhu of large dimensions in the neck and resonator, developed in the 1940s in an attempt to build Chinese instruments in families As in their constructions the two types are similar in performing techniques. Only the alto's strings are tuned a fourth or fifth lower than those of the erhu. As an alto instrument with a two-octave range, the type has a deep and gloomy tone. The zhonghu is commonly used in ensembles and accompaniments, and for solos as well.

Most well-known zhonghu pieces are On the Grassland (Mingyuan Liu), Song of Praise (Xiaoxi Lu), Suwu Tends Sheep etc.

The zhonghu is tuned as A, E or G, D.