WeChat is a Chinese messaging and calling app that grew into one of the most widely used communication platforms in China, and its distinctive ringtone became familiar to millions of users through daily calls and messages. As short-form video and meme culture spread globally, creators began using the sound outside the app to signal a call, a message, or a connection to Chinese internet culture. It remains popular because it is instantly recognisable, short enough for quick edits, and carries a clear meaning without needing any words or explanation.