Sun Wenpei is a professor at the School of Marxism at China University of Geosciences. He received his PhD in History from Wuhan University in 2010 and was appointed a professor at China University of Geosciences in 2021. His main research areas are modern German history, German history education, German historical thought, and modern Chinese history. He has presided over several scientific research projects of the Chinese government and the Ministry of Education, participated in the translation and publishing projects of the Rosa Luxemburg Foundation, and is currently serving as the deputy secretary-general of the Chinese Society for the Study of German History.

He has visited Germany twice for study. From 2003 to 2004, he studied at the Department of Law and Economics of the University of Mainz, and from 2012 to 2013, he conducted postdoctoral research at the Department of Education of the University of Cologne.

After World War II, the German government and society's reflection on Nazi history was widely praised by the international community and helped achieve European integration. In recent years, Professor Sun Wenpei has devoted himself to studying the issue of "Vergangenheitsbewältigung" in Germany, hoping to show Chinese readers more clearly the grand process of Germany's reflection on the Nazis and the history of World War II. His research is divided into three parts.

War reparations are the external manifestation of Germany's reflection on the guilt of World War II. The German government and enterprises "atone" for the crimes of World War II through continuous reparation to the victorious countries and victims. His monograph "History of German War Reparations after World War II" published in 2023 is the first monograph in domestic and foreign academic circles to conduct a panoramic study of the "victorious country reparation" and "victim reparation" paid by Germany after World War II. It proves that Germany's World War II reparation is the longest-lasting, most widely covered, and highest-paid war reparation in history. "Victim reparation" has replaced "victorious country reparation" as the focus of war reparation.

Germany is the only country in the world that sets "reflection on guilt" as the main theme of history education. History education is the fundamental driving force for Germany to reflect on the guilt of World War II. It explains why several generations of Germans born after World War II are still willing to bear "collective guilt". He started with the "re-education" during the occupation period and studied the historical education ideas, education systems, educational activities and teaching methods with Nazism and the Holocaust as the theme.

World War II historical revisionism is a pan-politicized historical thought and social trend. It reflects that Germany's reflection on its guilt for World War II is not achieved overnight and smooth sailing. It is a major issue that has been debated for a long time in Germany. After Dresden declared a "Nazi state of emergency" in 2019, he began to pay attention to and study the issue of German World War II historical revisionism, and for the first time in the academic community, he proposed the "three-part theory" of the German right-wing World War II historical revisionism: "the innocent Wehrmacht and people", "the relativity of German guilt", and "theory of Allied bombing and massacre".