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> So you're saying Chinese law applies to you when you're a US citizen in the US?
Sometimes
> We can't be subject to every country's laws, irrespective of citizenship or location.
No, that's why countries have extradition and other treaties that detail what foreign crimes they will recognize and provide reciprocity for with enforcement. Usually the answer is "Things that are also crimes in our country". Hacking is a crime in both countries, so Australian laws could be enforced on a US citizen through the mechanisms established by those treaties. Disparaging the CCP is explicitly protected in the US, so it wouldn't - so long as the US citizen never visits China.