Your piano is either Dunhuang or Yangzhou. The price is estimated to be around two or three thousand. I've been digging a piano with ebony since the tenth grade. It's more expensive, but the tone is particularly good. The main way to judge the quality of a guzheng is to see whether the timbre is thick, and it is not easy to miss the sound when the strings are relatively hard. Be careful not to buy several kinds of guzheng made of different wood, the timbre is not flattering ~ but your piano looks good.