There are local China subforums in Bitcointalk and Bitcoin have total ban in China, so soon forum admin probably will be arrested and transfered to China. What you think ?
You seem confused about the difference between China as a country versus the Chinese language. A local board made for Chinese speakers does not automatically mean its just for people in China.
Chinese is a major world language with speakers way outside of China itself and is even one of the official languages of the UN, so jumping to the conclusion that a Chinese language board must be for China specifically shows a misunderstanding of how widely used the Chinese language is, separate from the country. Besides, What about Taiwan? There are tons of Chinese speakers there, and its a totally separate country from mainland China, and they do not have a ban on Bitcoin as far as I know.
Criminal charge for forum admin can depend from local Chinese criminal law. And then China as state can start to operate through direct contacts between countries.
To bring a criminal charge, you gotta have a good reason to believe they committed a criminal act. So, what kind of crime are we talking about here?