ACG is the abbreviation of English Animation, Comic and Game, and it is the general name of animation, comics and games. ACG culture originated in Japan and spread through the Internet and other means. A subculture word commonly used in China society (this word is not used in Japan and is not popular in English-speaking countries).
Ff Group is a group with the goal of "burning heresy-heterosexuality" (here it can be understood that men without girlfriends are hostile to men with girlfriends), and its main slogan is "burning!" . Later, it was widely used as funny and self-deprecating among otaku and pseudo-otaku as the main audience of "Stupid Test Summoning Animals" (mainly concentrated in Acfun, Bili Bili and other animation barrage and post bar forum websites).
The word "fans" comes from Japanese "どぅじん", which originally means people with the same aspirations and hobbies. It is a word of animation culture, which refers to "self-creation, not influenced by business" or "independent" creation. There is greater creative freedom than commercial creation, and it has the taste of "creating whatever you want". Fan Zhi is a self-made publication of this kind of creation. This cultural circle is called "fan circle" or fan circle.