The single-stringed huqin (pinyin: dú xián hú qín) is similar in shape and structure to the erhu. The piano rods are mostly made of paulownia wood, and the common ones are 45 cm to 50 cm. The headstock at the upper end is in the shape of a square column with a flat top without decoration.

The upper part of the piano bar is 14 cm away from the top, and a peg is set horizontally. It is boxwood or hard wood, conical, and the shaft is 15 cm long. The piano bar is a cylinder, a jin is arranged near the peg, and the lower end is installed in the piano barrel and exposed. The qin barrel is cylindrical in shape and is mostly made of a section of moso bamboo. The barrel is 11 cm long and 5 cm in diameter. The front of the barrel is covered with bamboo shoots, and the back of the barrel is open. A bamboo or bone qin horse is placed on the panel, and a ponytail or silk string is attached, and the lower end of the chord is tied to the binding string, which is a small bamboo rod with a knot at one end, passing through the bottom of the piano rod. The bow is made of thin bamboo or bamboo pieces tied with brown silk or ponytail.

Among the stringed instruments in my country, there are few people who use the thumb to press the strings, but the Yao nationality single-stringed piano uses the inside of the thumb to press the strings is its distinctive feature. The left hand often decorates the melody with techniques such as tapping and portamento, and imitates the sound of the suona. Portamento usually glides in minor thirds from high to low. Can be used for solo, unison, ensemble or accompaniment. The Yao people often play solo in the leisurely winter nights, and often play in unison with two or more people or participate in the Yao nationality Eight Immortals (that is, the Eight Sounds) ensemble. In solo performances, the double strings are often stretched and the same tone is fixed, and the bow hair is also divided into two strands to rub the strings at the same time.

Famous repertoires include "Eight Immortals", "Welcome to Guests", "Toasting", "Joining the Army", "He Pai" and so on.