3D and 2D were virtual worlds such as anime and games. The specific differences were as follows: The 3D refers to the real world, which is commonly referred to as the real world, while the 2D refers to the virtual world, which is a fictional world created by computer programs, comics, animation, and other media. In the 2D world, people can interact with the characters in real time and feel the emotions and thoughts of the characters. In reality, we can't directly interact with the characters. The characters in the 2D and 3D usually have a fixed appearance and personality, while the characters in the 2D can have various forms and appearances. They can be three-dimensional, abstract, or even fictional characters. There is a clear boundary between the three dimensional and the two dimensional. Although they are both virtual, their world views, values, and codes of conduct are different. The difference between the 3D and 2D was that they were targeted at different user groups. The 3D world was for humans in the real world while the 2D world was for people who liked anime, games, and other virtual worlds. Both the 3D and 2D were virtual, but their worldviews, values, and codes of conduct were different, and so were their user groups.