As long as you're not associated with a terrorist group like ETIM you'll be fine. China cares first and foremost that you follow their laws while you're in China. The US and UK are much more paranoid about background checks of your online activity, it's them you should be worried about if you ever want to go there, they may even outright hack and scan your phone when you go through security if you're from a country they don't like or just look "suspicious", and we all know what counts as "looking suspicious"...