Place this clip at the reaction beat right after the offer appears on screen, then follow it later in the edit with a dun dun dun sting for a second refusal. Keep it as the first response so the sequence reads as judgment before escalation.
關於此聲音
The clip is a short villager grunt delivered like a stern warning, lasting just under two seconds with no words, just that low, unimpressed hmm. It feels deadpan and mock-serious, funny because such a small noise carries so much disapproval, like a trade has been refused and the conversation is officially over.