1. Criminal psychology: study the criminal's psychological characteristics, criminal motives, psychological defense mechanisms, etc. In order to better understand the nature of crime and provide a basis for reforming criminals.

2. Sociology: study the relationship between crime and social environment, the sociological reasons of crime, the sociological influence of crime, etc. In order to analyze the crime from the social level and provide ideas for crime prevention.

3. Pedagogy: To study the educational background, methods and effects of criminals, with a view to reforming criminals through education and improving their social adaptability.

4. Jurisprudence: study the legal provisions, legal application and legal effects of criminal acts in order to better protect social justice and people's interests.

5. Health care medicine: study the physical health, mental health and disease prevention of criminals, with a view to providing protection for their physical and mental health.

The above are some aspects of the topics discussed by prison inmates, and of course there are other topics, such as vocational skills training, cultural education and so on. The purpose of these seminars is to understand the situation of criminals, formulate better reform strategies, promote their physical and mental health, improve their social adaptability and lay the foundation for their reintegration into society.

For these discussion topics, the prison can organize relevant experts or educators to explain and discuss them, and at the same time, it can also let criminals participate in them to enhance their interest and initiative in learning. Prisons can also carry out various activities, such as cultural performances and sports competitions, so that prisoners can learn and communicate in a relaxed and pleasant atmosphere and improve their physical and mental health.