Cao, male, Han nationality, 1954, from Da 'an City, Jilin Province. Professor, doctoral supervisor and doctor of history of Northeast Normal University. Adjunct professors such as Liaoning Normal University and Huaiyin Normal University, and visiting professor of Changchun Normal University. He is also the editor-in-chief of Ancient Books Arrangement and Research, the vice-president of China Historical Literature Research Association, the editorial board of Historical Literature Research, a part-time researcher at the Research Center of Sikuquanshu of Hainan University, and a member of China Pre-Qin Historical Society. Professor Cao is the most representative scholar in the study of contemporary dropout. Compilation is a branch of ancient philology in China, which is regarded as archaeology in the field of ancient philology. Many pioneering achievements have been made in this field, and they have been widely cited in the current literature research. Main achievements: The Collection of Ancient Books on Lost Learning in China (370,000 words) is the first monograph on lost learning. In 2002, he was awarded the third prize for outstanding achievements in humanities and social sciences research in China universities, and in 2003, he was identified as a "teaching book for graduate students" by the Ministry of Education. A Centennial Study on the Collection of Lost Documents in China was reprinted by Xinhua Digest (2002- 1), and in 2002, it won the Southeast Academic Award of Fujian Social Science Association 1998-2002. Undertaking the project of "Comprehensive Collection of Rare Books of Ancient Books in China" funded by the National Research Committee of Ancient Books Arrangement in Colleges and Universities; In addition, some books have been published, such as Collation of Ancient Books (Shandong Education Press, 1988), Collection of China Classical Philology (East China Normal University Press, 2003), and quantitative analysis of the collection of "Da Dian Ben" in Sikuquanshu (1989). Textual research on Huang and his anecdotes (1992), Tang Qiu and his anecdotes (1997), a brief research on the anecdotes of Song, Ming and Qing Dynasties (1998) and the anecdotes. In addition, there are discussions about the research object of bibliography (1987), a summary of the study of classical bibliography in China (1950-1988) (1989), and the formation and development of literature and art to make up history between highways (1999). There are more than 30 papers, such as Reflections on Some Issues of Historical Chronology in China (199 1), Disciplinary System of Philology (1994) and Chronology of Ancient Books: Five Years in Western Friday (2002). Resume of study and work1973.4-1997.1educated users of Frye Commune in Da 'an County, Jilin Province1976.2-1980.1students of Chinese Department of Jilin Normal University1. .2 Part-time researcher of Quanshu Research Center of Liaoning Normal University, part-time professor of history department of Huaiyin Normal University, visiting professor of Changchun Normal University, editorial board member of Historical Philology Research, main research direction: ancient philology, pre-Qin philology, chronology teaching 1. Main teaching courses: undergraduate: China ancient philology, China ancient culture and China ancient culture. Postgraduate courses: China classical philology, China ancient philology, ancient book history, traditional textual research and pre-Qin philology.