America is one of economically strongest country, but I am not sure if its economic strength is real. I have heard that US is in debt a lot, that they owe China a lot of money. If they continue on that road of debt, Dollar would be ruined. With everything that America is involved with, its no wonder that Dollar is so volatile.
I don't know what to think about the economic relationship between the united states and china. I do wonder how much of china's recent economic success can be measured in china pirating patented american technology and media. China pirates everything from gaming consoles to CD's/DVD's, to technology and industrial processes which are copyrighted intellectual property which in theory should be protected under international law. China has even gone so far as to counterfeit ferraris, luxury automobiles, car parts and other brand name products.
Is it correct that china "loans" the USA money in terms of them buying US treasury bonds. I don't know if that qualifies as the united states owing china money. There could be a trade war brewing between the two nations. China recently has moved to drop the petro dollar and is seeking to denominate their oil transactions in their native currency, the yuan.
To be honest, american politicians normally bend over backwards for china. They have sold out their own country to the chinese for years. Its only recently that we're beginning to see a paradigm shift in the opposite direction, with the trade deficit between china and the USA reversing for the first time in decades.