Da Ruan (pinyin: dà ruǎn) is a Chinese plucked musical instrument, created during the reign of Emperor Wu of the Han Dynasty (140 BC-87 BC), and it was called Pipa at that time. Ruan (ancient pipa) - named after Ruan Xianshan, one of the Seven Sages of Bamboo Forest, who played this instrument.

As a kind of Ruan, Da Ruan plays the main role of bass and chorus in the ensemble; its sound quality is round, rich and beautiful, deep and tactful, and it is one of the important members of the national band, opera band, and national symphony orchestra. Beautiful solo instrument.

Da Ruan is composed of three parts: the qin (resonance) box, the qin stem and the headstock. There are 24 frets arranged according to the twelve equal temperament on the qin stem and fretboard; Arbitrary transposition, Da Ruan can play solo or form Ruan's ensemble