He studied in Yantai Zheng Yang Primary School, Qingdao Fuzhen Primary School, Qingdao Lixian Middle School and Shandong Provincial Qingdao No.1 Middle School. /kloc-0 was admitted to the Chinese Department of Peking University in September, 1955./kloc-0 graduated from undergraduate course in July, 1960, and continued his postgraduate study in classical literature. /kloc-0 graduated from graduate school in March, 1963 and has been teaching in this department ever since. He has served as a teaching assistant and lecturer, and was promoted to associate professor in 1985, professor in 1988, and doctoral supervisor of classical philology in China since 1990. He used to be the deputy director of the Teaching and Research Section of Classical Literature and the director of the Peking University Institute of Classical Literature. Retired in 2002 and continued to undertake the postgraduate courses in classical literature in this department. In 2004, he was re-employed by the school and joined the work of Peking University Confucian Collection Compilation Center as the editor-in-chief (one of four) of Confucian Collection, and the doctoral supervisor of Confucianism and classics in classical philology. At present, he is also a member of the national leading group for the planning of ancient books collation and publication, a member of the national research Committee for ancient books collation in colleges and universities, and a director of the Chinese Yanhuang Culture Research Association.
It mainly studies China ancient philology, as well as China ancient literature and ancient ideology and culture. In 2007, the 2007 Research Report on Outstanding Social Scientists in China, which was jointly completed by China Alumni Association Network, University Magazine and 2 1 Century Talent Newspaper, was selected as the first "List of 505 Outstanding Social Scientists in China" since the founding of the People's Republic of China. In 2008, he continued to be selected for the second list (after re-selection and adjustment).