good and bad,

if RMB rise over USD, 

1. Chinese citizens would buy USD and sell RMB in China,

   which would quickly push the RMB down and

   cause a large USD outflow from China.

2. Foreign-invested capital would flow out of China quickly,

   because these investors would choose

   to leave after realizing their profits.

3. Exports would face increased resistance

   (or reduced competitiveness) when the value of the RMB rises.

You need well calculate this. The current model proves working, so keep it