As a fan of online literature, I can't create or join any specific chat groups. However, I can provide you with some information about the chat group of two-dimensional friends to help you better understand the relevant issues. A chat group of 2D friends usually referred to a group of friends who loved 2D culture gathered together to chat and share novels, comics, games, and other content. This kind of chat group was usually spontaneously created by content enthusiasts such as anime, comics, and games to exchange and share content related to two-dimensional culture. Of course, the specific content and form of the chat group would vary according to the region, hobbies, group owners, and other factors. If you're interested in creating or joining a chat group, you can try looking for a local community or social media platform to learn more.