Pipa/Ruan/Yueqin/Liuqin

The pipa (Chinese: 琵琶; pinyin: pípá) is a four-stringed Chinese musical instrument, belonging to the plucked category of instruments (弹拨乐器/彈撥樂器). Sometimes called the Chinese lute, the instrument has a pear-shaped wooden body with a varying number of frets ranging from 12–26. Another Chinese 4 string plucked lute is the liuqin, which looks like a smaller version of the pipa.

The ruan (阮, pinyin: ruǎn) is a Chinese plucked string instrument. It is a lute with a fretted neck, a circular body, and four strings. Its strings were formerly made of silk but since the 20th century they have been made of steel (flatwound for the lower strings). The modern ruan has 24 frets with 12 semitones on each string, which has greatly expanded its range from a previous 13 frets. The frets are commonly made of ivory. Or in recent times, metal mounted on wood. The metal frets produce a brighter tone as compared to the ivory frets.