After graduating from university, he served as a researcher at the Institute of History of China Academy of Social Sciences for a long time (at that time, he was the Institute of History of the Department of Philosophy and Social Sciences of China Academy of Sciences). He has been a researcher at the Institute of History of China Academy of Social Sciences, a doctoral supervisor at the Graduate School of Chinese Academy of Social Sciences, the president of the Song History Research Association of China, and a doctoral supervisor at the Song History Research Center of Hebei University, distinguished professor. Mainly engaged in the study of Song, Liao and Jin history.