It looks like you add this sentence after my last reply. Anyway, have you read article you've shared?
Which countries have extradition treaties with the United States?
The United States has extradition treaties with more than one hundred countries, some dating back more than a century. It does not have treaties with dozens of others, including China, Iran, North Korea, and Russia, as well as many African, Middle Eastern, and formerly Soviet countries.
However, the United States does collaborate with some of these countries on law enforcement matters, including on transfers of persons in custody, on a case-by-case basis. For instance, the United States returned two corruption suspects to China ahead of a high-profile summit between Presidents Barack Obama and Xi Jinping in 2014.
So there's no way China government would bother try to arrest Bitcointalk admin. But let us know if you actually imply what Bitcointalk admin do is as bad as doing corruption on China government.