Like his teacher, he was a member of the Old Text School that was challenging the state orthodox New Text School. His contemporary rival was He Xiu (Chinese: 何休, 129-182). Zheng is notable for his syncretic attempt to bridge the two centuries of rivalry between the two schools. He adopted the strengths of each school in the interpretation of the Confucian classics although they usually favored the Old Text teachings. He was very influential but the government never officially adopted his teachings. The Han Dynasty was already in serious decline during his lifetime and collapsed a generation after his death. Both schools did not survive the chaos but Zheng's conception of Confucianism would be the mainstream interpretation for centuries.
The commemorative shrine of Zheng Xuan in Shandong was rebuilt under supervision of Ruan Yuan 阮元 (1764–1849) in 1793.
^Luo Guanzhong, Three Kingdoms: A Historical Novel: No. 1, translated by Moss Roberts. page 546, note 18. Foreign Languages Press. Tenth Printing 2007. First Edition 1995. Beijing, China 1995. ISBN 978-7-119-00590-4
^Elman, Benjamin A. Classicism, politics, and kingship: the Chang-chou school of New Text Confucianism in late imperial China (e-resource). 1990:220.
Knechtges, David R. (2014). "Zheng Xuan 鄭玄". In Knechtges, David R.; Chang, Taiping. Ancient and Early Medieval Chinese Literature: A Reference Guide, Part Four. Leiden: Brill. pp. 2236–39. ISBN978-90-04-27217-0.