Research on the political system and security system of major countries in the world Research on the national security system and mechanisms of main countries in the world Research on the social security system in Asian countries and regions Perspective on the space military situation of major countries in the world 并列题名：Research on the social security system in Asian countries and regions Overview of scientific research and academic systems in major countries of the world Research on the influencing factors and security system of information accessibility construction Study on the cultural security policy of the major countries around the world 并列题名：Overview of scientific research and academic systems in major countries of the world Media ethics codes of major countries in the world