System novels referred to stories where the protagonist obtained a system through some means. The system could give the protagonist various abilities to help the protagonist complete various missions and achieve goals. The main features of system novels included: [1. Protagonist obtains a system: The protagonist of a system novel usually obtains a system through a certain method, such as a lottery draw, completing a mission, or an accidental discovery.] This system could be a simple program, a virtual game character, a fan of online literature, and so on. The protagonist could interact with the system to obtain abilities to increase his strength. 2. Quest and goal: The protagonist of a system novel usually needed to complete quests and achieve goals to obtain the system's recognition and promotion. These quests and goals could be as simple as cleaning up rooms, upgrading skills, saving the world, etc., or they could be more complicated and difficult quests such as saving the system or defeating the villain. 3. System upgrade: In system novels, the protagonist's system would always upgrade to obtain better abilities and functions. This might lead to the protagonist's strength and ability to continue to increase, but it might also make the protagonist's life more complicated and dangerous. 4. Anti-traditional plots: System novels often have anti-traditional plots, such as the protagonist obtaining cheat-like abilities through the system or the system itself having certain flaws and loopholes that cause the protagonist to face various dangers and challenges. Virtual world: In system novels, the protagonist usually lives in a virtual world. This virtual world may be a game, a virtual community, or other types of virtual space. This virtual world might have some connection with the real world. For example, the protagonist could meet new friends or complete certain tasks through the virtual world.