Creation of more debt is creation of more money, increasing supply, and is inflationary.
Conversely, destruction of debt destroys money, and is deflationary, in this case, deflationary to the dollar.
Also, selling of dollar-denominated assets also decreases the dollar-value of those assets and so increases the value of the dollar.
But it is inflationary for the Chinese currency.
This is why with the Fed's QE programs since the 2008 crash everyon ehas been yelling "Inflation!!" for over a decade, yet there was none-negative until this year, and even that is arguably transient. So much money was destroyed in that crisis that they have been ever since then trying to fill in the (deflationary) hole.
To the extent that that debt is denominated in dollars and is about to be destroyed, it will be dollar-deflationary, not inflationary.