The range, range and characteristics of Erhu, Zhonghu, Gao Hu and Banhu.

Erhu is a unique stringed instrument in China. It is not only suitable for expressing deep and sad content, but also suitable for describing magnificent artistic conception. Its timbre is close to human voice and its emotional expression is extremely high. Erhu is soft and lyrical, and its voice is very singing, just like human voice.

The lever and drum of Zhonghu are longer than Erhu, bigger than Erhu, the tuning is four degrees lower than Erhu, and the strings are thicker than Erhu. When playing, the strength of the left and right hands is relatively greater than that of the erhu. Because the barrel is also made of python skin, the sound is rich and round.

Although Gao Hu's piano barrel is relatively small, and its tuning is higher than that of erhu, because it is made of wood and python skin, you can get melodious and soft timbre without using as much force as when playing Jinghu or Banhu.

Because the tension of the banhu string is relatively large, the strength of the left and right hands is relatively greater than that of the erhu when playing, and the loud timbre of the instrument can be obtained. In the traditional banhu playing method, especially in the accompaniment of traditional opera music, we often see that the fingers of the player's left hand have iron hoops, which is to increase the strength of the fingers to press the strings, so as to obtain the sound of their strength.