Bilibili (stylized bilibili, simplified Chinese: 哔哩哔哩; traditional Chinese: 嗶哩嗶哩; pinyin: bīlībīlī, Japanese: ビリビリ), also nicknamed B Site (Chinese: B站) in China, is a Chinese video sharing website based in Shanghai, themed around animation, comic, and games (ACG), where users can submit, view and add overlaid commentary on videos. Bilibili uses Adobe Flash or HTML5 player, which can be manually switched, to play user submitted videos hosted by either itself or third-party sources, while featuring a scrolling closed caption commenting system for real-time interactive playback experience nicknamed "bullet curtain" (弹幕, referring to the excessive incoming enemy fire frequently seen in shoot 'em up video games).
Bilibili offers videos of various fields, including music, dancing, science and technology, entertainment, movie, drama, fashion, daily life and advertisement films, but is also known for the extensive kuso-style parodies by subcultural content creators. Bilibili provides a live streaming service where the audience can interact with streamers. Usually the topic is anime, content creating, game strategy and so on. Other than videos, Bilibili also offers games, mostly ACG-themed mobile games, such as the Chinese version of Fate/Grand Order.