They could just do what they did with quantitative easing...have the Fed buy the debt. US bonds are essentially junk anyway, that's why the Fed alone owns 13% of them; what's another 10%? China has already been divesting itself of US treasuries anyway.
A huge swath of US treasuries are owned by medicare/medicaid and social security, so rising rates would increase their yield.
US debt is a bit of a shell game, as only 27% of it is owned by entities not under control of government.
Not saying any of this is a good thing...