The Chinese idea is to replace the US dollar with the Yuan as the reserve currency. As long as their currency reserves is in dollars, the US can just grab their currency reserves like they did to Russia, if they get sanctioned. You will be at the mercy of US banks handling your reserves. If the Chinese really want to protect themselves, the smart way is buy oil, lots of it and build silos to store hundreds of millions of barrels of oil. Buy commodities in bulk, gold, nickel, copper, palladium, etc. and hoard it, build storehouses to store it all. It is not going anywhere. Commodities and Oil will rise in price, as there are limited quantities. You will have most of what you need and not be held hostage by any country. Of course, China would also, have a strong military to impose its will in the South China Sea and even, invade Taiwan if they wish. I doubt the US would defend Taiwan.