Sheesh, an actual Whataboutism. The fact that "the US does it too!" won't help Grandparent poster/his wife if they get detained in China. GP says "there are currently a couple of hundred Americans who are being illegally detained in China right now", most likely they are dual citizens, or were born in China, and from China's point of view, one can't lose the Chinese citizenship, and they're detaining their own citizens.

I would also like to know if these are dual citizens or not. I think it would be newsworthy if hundreds of US passport holders who do not have chinese passports also were being held in China and not charged with any crime and unable to access consular services.

Sensationalizing claims then qualifying them later is inherently dishonest.