From the official Chinese government news, an article on China's "9 steps to stop AIDS."
The article has no official current tally for HIV cases in China, but does have this statement:
Experts have warned that the number of HIV/AIDS carriers in China will reach ten million, if prevention and control measures aren't carried out and implemented in time.
By comparison, the current HIV tally in the States is just shy of a million, according to the CDC.
Perhaps sobering thought -- this means about every three hundredth person you meet* has HIV, on average (of course, in parts of Africa, it's every third person, which is stunning).
*assuming you're walking around in the U.S.