Xi Jing Ping comes from Chinese internet wordplay around the characters 吸精瓶, a pun that relies on sound rather than spelling. Short pun based clips like this spread through soundboards, short video edits and chat groups, where users collect brief audio jokes that can be replayed instantly. Its appeal is portability: at about one and a half seconds it fits almost any edit without crowding the scene. It remains in use because the joke is understood from the pronunciation alone, even when listeners never see the characters written out.