China provides them with an exploited labor force at little cost. Beyond that China also subsidizes the manufacturing that is done there. They spend a great deal on manipulating their currency to keep prices of goods made there very low. They will build you a factory, pay for your electricity, and so much more.
China offers our business leaders an amazing deal – a deal that they can’t refuse. The owners and managers of our companies get really, really rich if they play along with China. Never mind if the companies go away later -- they’re rich.