One exit few have considered is for the PRC (China) to adopt dollars as their external currency. It would seem to strengthen their faith in the dollar while actually not changing the fact the central government still controls the exchange rate into and (crucially) out of yuan.No I don't think it is likely as it would seem like an abrogation of national sovereignty. But it would probably work long enough for the PRC to sell a significant number of dollars.
Just thinking outside the bamboo box here.