Brief introduction of Cao

A native of Da 'an, Jilin. Doctor of history. Professor of College of Literature, Northeast Normal University, concurrently editor-in-chief of Research on Ancient Books, vice president of China Historical Literature Research Association, editorial board member of Historical Literature Research, and adjunct professor of Liaoning Normal University and Huaiyin Normal University. Professor Cao is a representative scholar of contemporary compilation research. China's Collection of Ancient Books Lost (370,000 words) is the first lost monograph.