The exact origin of this clip is undocumented, but clips like it circulate widely on Chinese-language soundboards and short-video apps, where 'wu wu' is a common onomatopoeia for soft crying or pouting. It belongs to a broad family of cute sad whimper sounds that creators reuse whenever a moment needs instant, low-effort sympathy. Because the wail is short and looping-friendly, it works as a repeatable reaction sticker in chat memes, gaming montages and anime edits, keeping the mood light even when the joke is about losing.