Really? Do you think the US government would use your information in a more or less restricted way than the Chinese? Would your answer change if you were: a) a citizen of the US, b) a citizen in China, c) a citizen of a country where china has massive influence, d) a citizen of a country where the US has massive influence, e) a citizen of a strongly independent country?
Your answer is so baffling to me that I checked whether you're a real person, and you seem to be. I'd be surprised if either China or the US launched a war because of your personal communications so the question seems to come more down to who you trust to abuse the information more/screw you in an unaccountable way.