Short answers, pulled from the story.
Animanga is the combined term for anime and manga, Japan's two primary popular art forms. Anime refers to animated shows and films, recognized for vivid graphics and expressive character design. Manga refers to printed comic-style works, and many anime series are adapted from manga that first built an audience.
Fan communities produced unauthorized translations called fansubs for animated episodes and scanlations for printed comics, distributing them without charge. Works typically reached audiences first in English, French, and Chinese, with those three versions serving as starting points for translation into further languages. Many of those involved destroyed their copies once officially licensed versions became available.
In 2000, Japan's Ministry of Education, Culture, Sports, Science and Technology formally recognized anime and manga as traditional Japanese culture. The government then promoted them under the Cool Japan initiative, passing a law formalizing that strategy in June 2004.
The Association of Japanese Animations valued Japan's anime market at $19.2 billion in 2021. Precedence Research projects that the market will grow from $24.5 billion to $47.14 billion by 2028. In April 2023, the Japan Business Federation called for quadrupling overseas sales of Japanese content within a decade.
Dongman is a Chinese portmanteau combining donghua (animation) and manhua (comics), used as an umbrella term for both. The word is frequently misapplied to mean only the animated form, though its intended scope includes comics as well. When video games are added, the community uses the label ACG, short for "animation, comics, and games."
Bilibili is one of the most popular websites for ACGN content in Chinese-speaking communities. ACGN stands for "animation, comics, games, and novels," making bilibili a hub for all four categories of the fandom. The site sits within a broader ecosystem of Chinese vocabulary developed specifically to describe the anime and manga subculture.