China's accumulation of reserves is a result of the IMF's mismanagement of the Asian financial crisis a decade or so ago. If countries know they can't rely on the IMF to help them, their best defense is their own reserve cushion. In a time of spreading global recession, too much emphasis on savings in surplus countries like China can impede prospects for global growth.
The international institutions go around the world preaching liberalization, and the developing countries see that means open up your markets to our commodities, but we aren't going to open our markets to your commodities. In the nineteenth century, they used gunboats. Now they use economic weapons and arm-twisting.