Place it at the end of a setup, after the wrong guess has been shown. Open with a game show buzzer for the incorrect answer, let this clip deliver the correction, then follow with emotional damage for an exaggerated reaction to being misidentified.
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Around nine seconds long, this clip is a Dutch voice delivering a blunt correction, insisting the speaker is not Chinese. The flat, matter-of-fact delivery makes the denial land as awkward and funny rather than angry, like a misunderstanding being corrected a moment too late. It works because the claim is so specific and so confidently stated.