Sixian Xiqin (Pinyin: sì xián xī qín) (Reform Xiqin·Sixian Xiqin) is a Korean bow-drawn stringed musical instrument. In the 1960s, the Korean Xiqin performer Li Yinan and others successfully produced the reformed Xiqin and the four-string Xiqin, which have been used in professional music and art groups in Yanbian Korean Autonomous Prefecture, Jilin Province.

Four-stringed xiqin is a new type of Xiqin series of musical instruments. It includes three types of high-pitched, alto and bass Xiqin. It is most suitable for ensemble or accompaniment and has been used in Korean national bands.

The musical instruments of Xiqin are not only popular among Korean folk, but also popular among Mongolian folks in eastern Inner Mongolia Autonomous Region, Liaoning, Heilongjiang and other provinces. Its structure and playing method are similar to the Korean Xiqin, but the shape is smaller. The piano bar is made of colored wood or hard miscellaneous wood and is 50 cm long. The qin barrel is made of wood or metal, the barrel is 10 cm long, and the front mouth is covered with a paulownia veneer with a diameter of 7 cm. The pegs are wooden, conical. Zhang two silk or casing strings. The bow is made of bamboo, bent into an arc, with ponytails tied at both ends, and the length of the bow is 40 cm. The fifth tuning is g, d1, the range is g-g1, and there is only one octave. The pronunciation is soft and the tone is rich. However, it is not widely spread, and only a few old folk artists still use it.