For examples...

For examples,

1) If USD and RMB is 1:1 and dropping, then more and more people will sell RMB and buy USD, and come back to USA

2) And since most USD in China has a lot higher cost than just 1 Yuan RMB, and therefore US is taking back USD from China for free.

3) For US companies doing business with/inside China, their RMB earnings can buy more USD back home.

If we replace RMB with any other currency, the results are the same.

LOL