The original recording behind this clip is not documented, and it circulates on soundboards without an attributed source, so the safest read is that it is a voice bite rather than a line from a known show or game. The word itself, zhun bei, is Mandarin for 'prepare' or 'get ready', which is why the clip works in any language: the meaning is obvious from context and tone. Mandarin voice cues like this became popular in short-form video editing as hype markers, and this one survives because its length makes it effortless to drop before drops, reveals and transitions.