US is not concerned about China harboring their wanted men as China is by US harboring any of their wanted men. Remember, Chinese government always needs to try hard to look in control, not the US government.
In China, even a book writer seems to be dangerous to the government to the point they have secretly arrest him. Haven't seen that happen in US or Canada or even India. Tells a lot who is paranoid and shitting in their gowns.
Chinese for all their bravado cann't even post a simple picture like the below for the fear of their police making them disappear.
View attachment 454515
Remember, this image is banned in China, and NOT US. Tell us a lot.