Tofu Xiur is a Mongolian and Manchu plucked stringed musical instrument. The Mongolian Oirat dialect "Tofshur" means something to knock. It is also believed that the name comes from the special wood used to make the violin. The shape is similar to that of Arcan Dombra. It is very popular for solo, folk song and folk dance accompaniment.

When playing, sit in a sitting position, place the piano body diagonally in front of the chest, place the piano box on the right leg, hold the piano with the left hand, and all five fingers can be used to press the strings.

The two strings of Topsauer are often tuned according to the relationship of the fourth interval: a, d1, and the range can reach two octaves, but the range of a-a1 is commonly used in actual performance. Sometimes according to the needs of the music, the chords are tuned according to the relationship of fifths: g, d1. The reformed Topsauer has a mellow pronunciation, bright timbre, loud volume and rich sound.

There are many playing skills. The right hand has the skills of playing, double playing, plucking, picking, double picking, hooking, sweeping and blocking, etc. The left hand also has the skills of pressing, hitting, plucking, and hooking. The two-hand skills are often used in conjunction with each other and alternately. For example, after the right hand plays a note, the left hand quickly hits the major second or minor third above the string to obtain a vibrato effect; while pressing and hitting the string with the left hand, the right thumb is on the panel. Control resonance and hit the panel with your ring finger while strumming the strings with your index finger, and more.

The more famous pieces are: "Shawuledding", "Shawuledding", "Sola Shawuledding", "Ba Yinqieli" and "Jiangger Playing and Singing" and so on.