This is not correct. Products manufactured in China by US companies does not form part of the US GDP.
I would love to see your sources.
I agree - of course it doesn't, which is why it shouldn't be calculated as such.
I hope the link works. If not, you may google 'Susan Houseman offshoring GDP' and the link will come up among several others.
businessweek.com/magazine/content/07_25/
The underlying problem is located in an obscure statistic: the import price data published monthly by the Bureau of Labor Statistics (BLS). Because of it, many of the cost cuts and product innovations being made overseas by global companies and foreign suppliers aren't being counted properly. And that spells trouble because, surprisingly, the government uses the erroneous import price data directly and indirectly as part of its calculation for many other major economic statistics, including productivity, the output of the manufacturing sector, and real gross domestic product (GDP), which is supposed to be the inflation-adjusted value of all the goods and services produced inside the U.S. (For a detailed explanation of how import price data are calculated and why the methodology is suspect, see page 34.)
The result? BusinessWeek's analysis of the import price data reveals offshoring to low-cost countries is in fact creating "phantom GDP"--reported gains in GDP that don't correspond to any actual domestic production.