[...] Because its profit margin from making components was much larger than the margins it enjoyed from computer assembly, Foxconn was able to take them on by integrating all the parts manufacture and lowering its own margin on the final assembly work. Now that it is the largest private employer in China, with more than one million workers, Foxconn has the market power to force these former customers to adopt its vertical production methods by merging with its other component suppliers. [...]