The structure of the Zhonghu is the same as that of the Erhu, but the shape is slightly larger. The stem is 86 centimeters long, and the headstock is carved with a faucet or a meniscus.

The barrel is larger, mostly round, 15 in length, 10.5 cm in diameter at the front, covered with python skin, and has a sound window at the rear. The barrel is larger and the stem is longer. It has two kinds of dragon head and curved neck in color. Most of the qin barrels are round, but some are octagonal in the front and round in the back, and there are also loudspeakers in the middle. The vibrating membrane covered by the piano barrel is python skin, and it is appropriate to use medium scales and suitable thicknesses, otherwise it will affect the sensitivity of pronunciation and the thickness of the sound.

When using silk strings, the outer strings use the middle strings, and the inner strings use the old strings. Use steel strings.

Zhang steel strings. The bow is 75 cm long. In the 1970s, it was reformed into a flat round and flat octagonal qin barrel. It is used for Jiangnan Sizhu, Cantonese music and other instrumental music and band ensemble or Yue Opera accompaniment, and also used for solo.

In the band, Zhonghu mainly acts as a foil to adjust the timbre and enhance the volume. It is a bridge between high and low instruments, as well as strings and wind instruments, making the sound of the whole band full and rich. In addition, Zhonghu is also an indispensable instrument in the accompaniment of folk music such as Jiangnan Sizhu, Guangdong music and Yue Opera music. It belongs to the middle music instrument in the national band, which makes the sound of the band plump and rich. Has a warm, full-bodied tone.