Well said and I agree :)

China isn’t reliant on imported food, from the US or anywhere.

That’s the trouble with words like ‘artificial’ and ‘natural’. They mean nothing. It would be better to call them refined additives, because I expect the “stevia” would be in a refined, extracted form when added - whether substantially changed from the form present in the plant or not, this could be considered artificial, if we insist on using this word.