Thx man. I like your simple argument but there is a missing unspoken assumption you made - the appreciation yuan will cause rate go up(my guess ur talking about long term USG rate). Why is that? Can you explain further or correct me if my understanding your argument is wrong.
Btw I think there is another way to explain. Think it as a teeter-totter game. On one side you got the heavy pressed RMB/USD. On the other side you got up-in-the-air EUR/USD. Once the pressure released from the heavy side, balance will be restored. 2 cents.