China will eventually have to give something up, either by importing more or by stimulating domestic production by partially shifting its production matrix abroad; in both situations, this affects the Chinese trade surplus. China's economic future will no longer involve such a favorable trade balance generating huge surpluses, but rather increasing its gross national product.
A simple appreciation of the RMB would do.
These trade surpluses will continue to create frictions. Even friendly countries like Indonesia, Malaysia are raising barriers.
Getting trade barriers up while retaining a weak RMB is the worst case scenario.