I see nothing wrong with this given the context of China, so long as it's applied with context in mind. It's hard to think of a specific example and I don't want to be just inventing wild hypotheticals, but if conversation were to organically go to some country's drug policy that has a different historical context (such as the US and how it vilified drug use in order to do mass incarceration), I would hope you'd be understanding of the reaction to that in the US context. The same as others being understanding of the reaction to drug use / culture / policy in the China context. I would not expect you to be ok with others actively promoting drug use with such a context as an excuse to do so. I just wouldn't want someone to get a ban because they come from a different context and don't know the difference, so I'd hope you at least warn them first in such a case. Hope that makes sense.