Chaoer has two forms, one is still keeping the prototype of Huer, but the lower end of the piano box has become a flat bottom, single-sided skin, more similar to Xihu; the other is a long piano rod inserted into an inverted trapezoid Box, double-sided skin, ponytail string, ponytail bow.

The various forms of Chaoer are composed of a resonance box, a headstock, a piano rod, a peg, a bridge, a string and a bow. There are many styles of resonance boxes, including an inverted trapezoid with a wide top and a sharp bottom, a rectangle with a shovel style, and a dipper or scoop shape.

sound box
The four-sided frame of the inverted trapezoidal and rectangular piano boxes and the backboard of the scoop-shaped and scoop-shaped piano boxes are all made of hard miscellaneous wood.

For those with two-sided skins, the front and rear sides of the two skins are cross-connected and taut with leather ropes. The front is covered with skin, the back is covered with thin wood, and there is a circular sound hole in the center of the board.

headstock, stem
It is made of a whole piece of hard miscellaneous wood, with a total length of about 95 cm, and the top is the head of the qin. Most of them are carved with the head of a chi (chichi, an animal in ancient legends, a genus of dragon), a double-headed horse or a flat head. Top without decoration, etc. There is a string groove under the headstock, and there are two pegs on both sides (one on the left and one on the left).

peg
Made of hardwood, conical or flat ears. The stem is slender, flat at the front and round at the back.

bridge
A wooden bridge is placed slightly above the center of the leather surface, in the shape of a bridge, and the bridge is higher. Occasionally, players insert Mongolian knives under the strings to adjust the tone and volume.

strings
Zhang uses two bundles of ponytails as strings, and the strings pass through the mouth below the string groove.

bow
The rod is a straight wooden rod, and the two ends are tied with ponytails as bow hairs, and the bow hairs are not taut. Among these piano types, the inverted trapezoidal chaoer is relatively simple in structure, and is easy to make in pastoral areas, and the resources of horse skin and horse tail are also extremely rich.

The horse skin covered on both sides of Chaole has a different tone than sheepskin or python skin. The horsetail bow is used to pull the tail string and cause the horse skin to vibrate, making Chaoer full of rich grassland charm, and the sound shows the wildness of mountains and rivers. There is a deep and captivating charm to the spirit and the potency of the horse.

Famous pieces include "Vermilion", "Gada Merlin" and "Muqilai".