Bai Hua, male, born in Beijing, 1953. Since 1979, he has studied and worked in Renmin University of China, Minzu University of China and Osaka University of Japan, and successively obtained Master of Laws, Doctor of History (China) and Doctor of Literature (Japan). He has served as a teaching assistant, lecturer, associate professor, diligent lecturer (National Wakayama University, Japan) and visiting researcher (Osaka University, Japan) at Renmin University of China, and is currently a double professor at Nankai University Law School and Zhou Enlai Government School of Management. His main works include China Forbidden City-Palace System and Ancient Politics in China, Tian Zi Forbidden City-Analysis of Ancient Palace Management in China, Group of County Officials in Ming and Qing Dynasties, Research on County Political System in Ming Dynasty, Official System History in China (co-author), History of Chinese Political System (second edition) (co-author) and Chinese Political System. Now he is engaged in the research on the history of China's political system and China's legal system.