1. The relationship between a character's personality and his personal experience and achievements: we should start with his family background, study his parents and family factors, and then deeply understand the psychological impact of these important events on the parties in the process of personal growth;

2. The prominent role of environment and background of the times: it is necessary to analyze the important social background of historical figures in different times, and the major events that have happened have had a macro impact on the author class;

3. Macro facts: We should refer to some historical books and original works, and pay more attention to micro-level research. We suggest referring to some high-quality second-hand research, such as the works of Professor Niu Dayong and Professor Yan Buke.