Sanxian ("Three strings") or Xianzi (Spike lute)

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~73262~166250/full/,150/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~73493~167024/full/,150/0/default.jpg