Ruan is a traditional Chinese musical instrument, classified as a type of lute. It features a round body, a long neck, and typically has four strings. The instrument is played with a plectrum and is known for its soft, melodic sound, making it popular in various forms of Chinese music, including folk and classical genres. The Ruan has several variations, including the Ruanzi, which is smaller, and the Dazhongruan, which is larger. It is often used in ensembles alongside other instruments like the Erhu and Pipa, contributing to the rich tapestry of Chinese musical heritage.