The guzheng, also spelled gu zheng or gu-zheng (Chinese:古箏; pinyin:gǔzhēng, with gu古 meaning "ancient"; and also called zheng箏) is a Chinese plucked zither.
Books
Han Mei. "Guzheng." In The New Grove Dictionary of Music and Musicians, second edition, edited by Stanley Sadie and John Tyrrell (London, 2001).