IMF is always right.

Currently China's GDP is about 8+%.

She should take the IMF advice and bring her GDP down to a more fitting level so that the U.S. can catch up with her.

According to the Economist the U.S. GDP is at about 2+%.

You see the gap between the two.

Solution:
Slow the quicker one down or speed the slower one up.

If you opt for the latter, it may put too much of a strain on the U.S. and you could not possibly allow that.

It would be like asking the Israeli to stop asking for more war materiel from the U.S. to unload on top of the Palestinians versus giving more sling shots to the Palestinians.