Hong Kong puts bounties on pro-democracy activists, including American citizen, under China-imposed law
Hong Kong would be violating US law by doing so. US law prohibits any foreign governments from offering rewards or bounties for the capture of American citizens. If a foreign government were to engage in such activities, it would be considered an act of hostile aggression towards the United States and could provoke a swift and powerful response, both from the US government and its allies.
Furthermore, as the US and Hong Kong remain in a strained relationship following the implementation of Beijing’s national security law, the US government is likely to take strong actions to protect the human rights of its citizens and oppose any attempts by the Chinese government to oppress the people of Hong Kong.