The installation of dulcimer strings is very similar to that of a piano. Each piano is equipped with a special wrench. If you buy finished strings, you can directly put the knotted end of the string on the corresponding missing string under the left panel. position, then pull the string over and thread it through the screw hole on the right to tighten it. After tightening, the string must be depressed to avoid noise. The string number matching mainly depends on the model of your piano. Is it 401, 402 or 501, 502? Determine the model number and then buy the corresponding strings. Just go to the store or compare it with the tuning chart that comes with the piano when you buy it. The lowest and thickest string is No. 16, and the higher the number, the higher the number.