You gave no link to that number. Even the Chinese government claims it's 6.25% But the real number is more like 12%0-15%. Since the government doesn't give honest numbers, we don't know for sure. Unemployment is a severe problem in some areas. I do not believe their unemployment is lower than the U.S. rate.
I apologize, I found a real source and the number is slightly higher than the one I had heard:
4.1%.
http://www.statista.com/statistics/167111/unemployment-rate-in-china/