The scattered sound of the two strings of the guqin has a buzzing echo.

The humming of guqin may be due to the uneven surface of the piano, and there is no polishing somewhere. You can find a piano technician to repair it.

It is also possible that the sound of the strings is affected by the weather, so you can try again on a sunny day.

If the strings of guqin are too loose, they will deviate. The strings can be fixed by pin and goose's feet. The left side of the string is wrapped around the feet of two geese, and the right side is tightened by a velvet buckle wrapped around the product. The strings are fixed by the friction between the strings and the goose's feet and the pressure generated by the tight strings.