We do business with China and visit them regularly, even though we know that much of what makes their manufacturing industry so competitive is the use of slave prison labor
Though the conditions of labor in China seem shocking to comfortable Americans, they are not, in general, "slave prison labor".
How about this. I visited China last year, and saw/heard about the following.
Say you want to build a new building. The workers are brought to the construction site, and they live on the site 24/7, taking shifts to sleep in a small cot. When they are not sleeping they are working (7 days a week). They do not see their families for months during the job. They work on site for several months, and will only receive pay after the building is done. If you have to leave the site for some reason (say a sick or dying relative, or you get sick yourself) before the building is done, you forfeit all your pay. You could have worked 6 months on a job, and if you hurt yourself, you go home without even $1.
It's a deplorable condition being forced to live where you work. It's a prison, even if voluntary.
Though the conditions of labor in China seem shocking to comfortable Americans, they are not, in general, "slave prison labor".