Rapid industrialization has a cost, which anyone in any western country could have told you 150 years ago. But China is continually improving, and I would expect them to be similar to US working conditions of 20 years ago within the next decade. And I say US conditions of 20 years ago, because our conditions have backtracked since then, and will likely continue to backtrack because capitalists own the government and good working conditions are a barrier to profit.