It's not too bad. That works out at about 12.5 RMB / hour, more than someone would make working a night shift at KFC here in Guizhou (I expect in Shen Zhen it would be a little higher). I work at a coffee shop owned by my friend here; 6 - 10 RMB / hour is quite typical for unskilled labour. Also, chances are that these factory workers have free accomodation and subsidised food which makes a significant difference.

The journalist also notes that "there aren’t enough workers to fill the positions at the factory as they keep resigning". This doesn't neccessarily mean its a bad place to work. I hardly have any friends that haven't quit at least one job in the last year or two. Modern Chinese culture -- particularly among young people -- accepts quitting your job, messing around for a few months ("playing" in Chinese) and then finding another as quite normal.