These are stringed instruments.
Broken down:
Bow-drawn stringed instrument: Erhu
Plucked stringed instrument: Pipa
Percussion stringed instrument: Yangqin
A general name for an instrument that produces sound from taut, vibrating strings. Its five basic types are: stringed instruments, harp, lyre, lute and zither. When a precise, acoustically based name is required, the term "stringed instrument" is used instead of "stringed instrument."