Foxxcoon pays about 400 USD a month - http://www.nytimes.com/2012/02/19/technology/foxconn-to-rais...
and if that's for 7 days a week 10 hours a day as the reporter said, that's 300 hours.. so 1.33 dollars per hour.
BTW, the typical salary range for a junior Ruby dev in a second or third tier city in China is about 800 - 1600 USD per month. Just to put things in perspectives