The size of the big lei qin tube is 11 cm.

Leiqin comes in two sizes: large and small. The big leiqin is 110 centimeters long and has steel strings; the small leiqin is 90 centimeters long and has silk strings. The stem, headstock and tuning pins are made of hardwood. The piano bar is narrow and long, with the surface serving as the fingerboard. The headstock is in the shape of a shovel, with a peg on the left and right sides. The surface of the tuning shaft is engraved with patterns, and the top of the shaft is embedded with bone decoration.

The traditional leiqin has a very long rod and a large piano tube. After repeated practice and testing, the inventor shortened the piano rod to the most suitable length. The effective chord length is 84 cm and the diameter of the piano tube is 84 cm. Shrunk down to optimal size, 11 cm in diameter.

How to play

When playing, sit in a sitting position with the piano tube on your left leg, hold the piano in your left hand to press the strings, and hold the bow in your right hand to play between the two strings. Bowing techniques include crescendo, decrescendo, slow weakening and suddenly strong, slow strong and sudden weak, and large changes. Good at simulating the sound effects of human voices, opera singing and various musical instruments. The singing styles of the opera genres played are lifelike. Commonly known as "Big Leila Opera" and "Skillfully Changing Silk Strings".

To play the Lei Qin, you should sit in a sitting position, place the piano barrel on your left leg, hold the piano in your left hand to press the strings, and hold the bow in your right hand to play. The fingering method is the same as that of the Erhu, but you usually use your index finger and ring finger to press the strings. And often use large interval glissando.

When the big leiqin is used as a solo instrument, only the outer strings are usually used. When used in ensembles, the bass part is played to enhance the sound thickness of the band. When playing the Xiaolei Qin, hold the bow in your right hand and hold the pegs of the outer strings in your left hand to change the pitch. Xiao Lei is often used as a solo player and generally does not participate in band ensembles. There is no obvious difference in the sound range of the leiqin, the volume is larger, and the timbre is soft and round.