It fails due to currency speculators. American currency traders who have stockpiles of hot Yuan will have ripped off China big time. Their proceeds, US dollars, will then circulate in the US economy.
USA, (as does any country,) only does 2 kinds of deeds. One that advances herself and one that damages others. And they have the shamelessness of always making either of the two sound like mutually beneficial. Japan is a case in point. America basically neuters Japan by restricting their military, build bases everywhere and make the Japanese pay for the deployment which clearly benefits mostly the US( and China). Not that I have anything against it as a Chinese. Yet, the US claims that this is the best arrangement for the Japanese! Just like what their claiming about an appreciation of Yuan ----the best arrangement for the Chinese!
The mere fact that US of A is trying to force China into appreciate the Yuan makes me skeptical about who the true beneficiary will be.