Or, more to the point, in US prisons? Arguably Chelsea Manning, but her offense (stealing secrets) was considerably different from mere speech, and she's out of prison now.
US prisons; Political dissidents not so much, but instead look at the general prison situation, particularly blacks and impoverished, and you start to see what I'm talking about. Then there's the whole Guantanamo bay thing...
The Chinese judicial system, prisons and government obviously have many flaws, arguably getting worse, and has a difficult relationship with human rights. However, the Chinese government does not do things like operating Guantanamo Bay or cause civilian deaths using WMD as excuses. How many civilians got killed in Iraq as a direct consequence of US invasion? Their lives worth less than those human right activists?
Censoring winnie the pooh? then tell me how come there are tens of thousands of winnie the pooh related products (toys, books, clothes etc) on Taobao.com?
I find it baffling that there is an idea that China's records on human rights is comparable to that of the US. The US has human rights problems, and China's are objectively much worse.
Please define what metric(s) you're using to make that statement. I'm not saying you're wrong, but a statement of objectivity requires something to substantiate it. Certainly, the US doesn't have nearly as many political dissidents incarcerated, but China doesn't have a systematic problem with summary executions of a racial group by police (for example; there are plenty more on both sides, which are not necessarily comparable; yes I know in this case that China has its own minority racial group issues). Then, are scale effects (population size) factored in your figures?