The pipa (Chinese: 琵琶; pinyin: pípá) is a four-stringed Chinese 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. The pipa appeared in the Qin Dynasty and developed by the Han Dynasty. It is one of the most popular Chinese instruments and has been played for nearly two thousand years in China. Several related instruments in East and Southeast Asia are derived from the pipa; these include the Japanese biwa, the Vietnamese đàn tỳ bà, and the Korean bipa. The Korean instrument is the only one of the three that is no longer used. Attempts to revive the instrument have failed, although examples survive in museums.