>Yes you can't because Americans aren't subject to Chinese law.
China certainly disagrees with you. Just look at the new Hong Kong NSL - it claims jurisdiction over every person on earth for offenses defined to vaguely as to be meaningless. This obviously has horrific effects for the people in Hong Kong - protesters are already being threatened as being national security threats for having a protest where they did nothing but stand still and hold up white paper - but also chilling effects for anyone who might ever visit Hong Kong, the PRC, or any country friendly with or afraid of the PRC, especially if they have an extradition treaty.
The law had been used to ban pro-democracy books and arrest democracy activists in Hong Kong within a week of its passing. Piss off the PRC enough and go on a trip to Thailand, and you might end up in a Chinese prison for the rest of your life, because article 38 covers any action by any person, no matter where they are and wether or not it was legal where they were. It was illegal in Hong Kong, so you're fair game if you're ever within their legal net.
While the FBI has more power over me day to day, I am not afraid of them arresting me for being a proponent of free speech or democracy. If I was someone who traveled more frequently in those previously mentioned countries, I certainly would be.