The Chinese manufacturing sector is only slightly larger than the USA.
$1.922 Trillion VS $1.885 Trillion
The USA is able to manufacture $1.885 Trillion of goods in 2010 with only 11.6 million workers.
China needs over 100 million workers to manufacture $1.922 Trillion worth of goods in 2010.
China owns $1.17 Trillion of US government debt. That is only 8% of the $15.7 Trillion national debt.
We could easily print $1.17 Trillion and pay off the debt to China.