Put it at the end of a food or drinking joke, after the setup line, then follow it at once with the Kiko laugh so the reaction lands in the same beat. For a chat reply, open with the WhatsApp message sound to signal a new audio, then let this clip close the exchange.
关于此声音
This is a very short burp, lasting well under a second, processed through a voice changer and labelled in its file data as a drunk burp. It lands as crude, abrupt and deliberately gross, the kind of noise that stops a chat for a second before everyone laughs. The voice-changing effect is what gives the belch its altered, unnatural character.