Hong Kong puts bounties on pro-democracy activists, including American citizen, under China-imposed law
If Hong Kong moved to put bounties on pro-democracy activists, including American citizens, under any China-imposed law, this would likely be met with strong protests from the international community, including the US. The US government, in particular, would be very likely to challenge the legality of such a measure and object to any attempts to persecute individuals for exercising their right to free expression. Additionally, the US would likely have a range of diplomatic, economic, and legal responses available to it, including placing sanctions on the Hong Kong government or individuals associated with it, and initiating court cases to challenge the law.