Depends where you are, but I’d advise against presenting as Chinese, chinese tourists have such a bad reputation sometimes you see signs like “no spitting in the dish sink” or “do not put toilet paper in dust bin” exclusively in chinese in hostels. Which indicates behavior expected of Chinese tourists

Across asia, I get curious looks rather than any hostility. I kinda wonder what the american was doing that drew so much attention, if they weren’t making it up for content.