This sound circulates as a short user-shared Mandarin voice clip rather than a line tied to a widely documented film, show, or song, so its appeal comes from the phrase itself and the cheeky social situation it suggests. Short-form creators reuse it because a phone-number request is instantly recognisable, even across languages, and the questioning ending gives editors a natural place to cut to a reaction. Its continued use online reflects that simple, relatable awkwardness travels well in memes, reaction edits, and playful chat exchanges.