The probability that there will be some sort of official link between China's currency and gold anytime soon is very close to zero, and the same can be said about every other national currency. Unfortunately, the current major trend is for increasing, not decreasing, government control over banking and money. . . .
Many years into the future there will come a time when our present monetary system is so ravaged by inflation that a complete system change will be unavoidable. At this future time the reintroduction of an official monetary role for gold could become a realistic possibility.
Rather than having a Gold Standard or some other official (government-mandated/controlled) link between the currency and gold, the optimum solution would be for the government to get out of the money business altogether and let the market use whatever money it chooses to use. The trouble is, the optimum solution is so far outside the realm of mainstream thinking that it won't even find its way to the discussion table until after there is a total monetary collapse.