1) China is accused of manipulating its currency, the renminbi (yuan), by keeping it artificially low to boost exports. Economists estimate the yuan is undervalued by 25-40%. 2) By keeping the yuan low, Chinese exports become more competitive on the global market. This allows China to pursue an export-driven economy and accumulate a large trade surplus with countries like the US. 3) The US would benefit from a higher yuan as it would make Chinese goods less competitive compared to American products. However, China's $3 trillion holdings of US treasury bonds give it influence over US monetary policy for now.