Second, the bottom of the piano code is not completely attached to the ladle surface.

Third, the hanging place is not covered by a ladle.

Fourth, the two strings slotted on the piano code are too close together.

Fifth, the piano size is too high and the weight is too low.

Six, the strings should use strings, which are sold in Banhu's house in Lu Yu, Zhengzhou.

Seven, base, spoon, piano, near the junction is not tight or the position is not correct.

In addition, the ladle surface is too thin, the above eight aspects have been solved, and the timbre is definitely chaotic, for reference only.

It's Banhu's * * * sound box, cylindrical, made of hard coconut shells, and also made of wood, copper and bamboo. After 1970s, it was molded with low foaming (ABS) material. The shape of the piano tube with two big ends and two small ends can concentrate the sound and create the characteristics of banhu. The big gourd ladle has a low pronunciation, while the small gourd ladle has a harsh pronunciation. The front mouth of the piano barrel is not covered with leather film, but glued with paulownia jigsaw puzzle. It is the key to the timbre of Banhu, and the sycamore tree with soft wood, straight texture, uniform density, no knots and no water stains is better. There are some openings at the back of the tube, and some have five sound holes in the shape of money eyes.

The stem is made of mahogany, rosewood or rosewood, preferably ebony. The valve stem is cylindrical with a square head and a chord hole at the upper end. Don't be too long. Too long will hinder the beauty of pronunciation, widen the finger position, and make it difficult to fingering and mastering intonation.

Chords are mostly wood or boxwood, with patterns on the surface and installed on the same side of the piano. At present, most banhu uses the copper shaft of wooden handle gear, which is accurate and will not return the string.