Place it after the reveal frame in your edit, preceded by a bell ding to mark the number, then follow it with a vine boom for a bigger second hit if the reaction needs extending further.
关于此声音
This is a 4.9-second clip filed simply as 2939, with no title or artist attached to the recording. That bare number gives it a puzzling, deadpan feeling, like a code being read out in a game or a random result landing without any explanation at all.