When playing the big sanxian, use the sitting position, with the legs naturally separated, the left leg slightly stretched forward, or the right leg is placed on the left leg, the qin drum is placed on the right leg, and the headstock is inclined to the upper left.

Lightly hold the piano rod with the left hand, press the strings with the index finger, middle finger, and ring finger, and the gesture is in the dragon claw style. play.

There are many kinds of tuning methods for sanxian, and the folk generally set it as "hard middle string" or "soft middle string", and "hard middle string" is the most commonly used.

The "hard middle string" means that the middle string is in a fifth relationship with the inner string, and the outer string is in an octave relationship with the inner string.

The "soft middle string" means that the middle string is in a fourth relationship with the inner string, and the outer string is in an octave relationship with the inner string.

For national bands or solos, the sanxian is also set as a "hard middle string", such as C, G, c; D, A, d or G, d, g, etc.

The vocal range is generally three octaves. The sound of the three strings is firm and crisp in the treble, bright and round in the midrange, and plump and rich in the bass. The volume is louder. The left-hand techniques include plank, sticking, kneading, buttoning, sliding, etc., while the right-hand techniques include bouncing, picking, double bouncing, double picking, rolling, dividing, sweeping, smashing, and rubbing.

It can freely play major and minor thirds, pure fourths, fifths, and octaves, as well as chords composed of thirds, and can be played in transposition.

Famous Sanxian Solo Pieces from Ancient Times
There are: "Acacia Order", "Haiqing Takes Goose" and "Liu Yaojin", etc. The first two originated from the string ensemble "Thirteen Sets of Strings and Cables", which was circulated in the north before the 18th century, and the latter is a piece of opera.
Mongolian traditional sanxian
"Aduqin Asir", "Ancient Sun Runs to Aqitu", "Yellow Flag Asir" and so on. "Aduqin Asir" is a traditional three-stringed solo piece circulated in Xilingol League, Inner Mongolia Autonomous Region. "Aduqin" means the flag of Taipu Temple, and "Athir" means the music. Joyful music.