China has long pegged its currency to the Dollar. After the USD started to depreciate against many currencies in 2002, expectations emerged that China would move away from a tight dollar peg. Following China's reforms in 2005, the Yuan appreciated by over 20% against the dollar. However, since July 2008, the Yuan has been stable against the dollar, leading to expectations, illustrated by the forward price, that China's repeg will persist.
To Rein: The BIS publishes a set of real exchange rates which capture the economic appreciation rather than simply the dollar (policy) perspective.