chinese yuan has appreciated due to its widespread export
activities. China is the biggest exporter & if home currency
depriciates then it is good for exporters. when compared to dollar
yuan is appreciating more because chinese products cater to
worldwide needs & is cheaper. However for dollars or america in
paticular their products are too tailored &customised serves
only a handful. also america is a high value currency nation.
America outsorces most of its manufacturing process from china
& this makes yuan more in demand & thereby it appreciates
more than dollar.