The phrase translates from Mandarin as he is very strange, and the clip is shared online mainly as a short reaction sound rather than as part of a longer recording. Its appeal comes from the drawn-out, sing-song delivery, which turns a simple observation into a teasing comment that fits memes, reaction videos and short-form edits. Because the wording is short and instantly understandable to Mandarin speakers, creators can drop it over almost any odd moment without needing extra context, and that flexibility has kept it circulating as a light-hearted way to call out weird behaviour.