Cheng Xuanying

Cheng Xuanying (Chinese: 成玄英; pinyin: Chéng Xuányīng; Wade–Giles: Ch'eng Hsüan-ying; fl. 631–655), courtesy name Zishi (子實), was a Taoist monk known to posterity as the "Master of Doctrines at Xihua Abbey“ (西華法師) and was one of the principal representatives of the "School of Double Mystery" (Chongxuan) during the reigns of the emperors Taizong and Gaozong of the Tang dynasty. He is mainly known for his commentaries to the Daodejing and the Zhuangzi (also known as the Nanhua Zhenjing).