I didn't see it as racist, just reporting the facts and language as stated in your email. But I'm not of chinese origin,
I've had them purport to be from Ukraine, Russia, and India, but not China. The most recent one started with "Howdy", so I assume it was intended to be from the US. I suppose it could have been someone pretending to be someone pretending to be from the US. These would-be blackmailers can devious in their usage of broken English.