The easiest way would be to join Amnesty International.

It's not so much China as it is Xi and his minions. There are 1.2 billion hostages under the control of Xi.

Just remember you're dealing with people who have bizarre logic. For example the Dali Lama is old and his new successor by tradition reincarnates. But China the PRC has demanded "that he must reincarnate, and on their terms." Now that's nuts.