One advantage America has, and will remain having as an advantage as long as its broken: it borrows a lot of dollars. So if China wants to save a few billion do

One advantage America has, and will remain having as an advantage as long as its broken: it borrows a lot of dollars. So if China wants to save a few billion dollars, it is super easy to do it by just bidding for US treasuries, rather than trying to convert it to yuan and somehow putting it in its own economy where it won't cause overheating. America is essentially just a debtor of last resort, that is the superpower of the dollar.