The Chinese can't stop buying bonds if they want to keep their currency depressed relative to the dollar. Moreover, they have no intention of stopping the gravy

The Chinese can't stop buying bonds if they want to keep their currency depressed relative to the dollar. Moreover, they have no intention of stopping the gravy train - tanking the US economy (further) would only hurt their own largest market, and no other large market is as willing to accept one-sided trade and currency policies as the US.