Caller: Chinese embassy...? or so they may have claimed

Got a call from this unknown number, which I ignored - it went to voicemail, and when I listened to that, it was a long rambling message in Chinese (no idea which dialect) that had the English words "Chinese embassy" somewhere in the mix in English.
No idea what it's about, but can only assume it's dodgy, since the actual Chinese embassy has no reason to call me.