The United States and the European Union have been pressing China's government to alter its exchange rate policy to allow more flexibility, presumably so that the yuan will appreciate by a substantial amount.What has been and are China's policies toward the foreign exchange market?From the point of view of China's government and the well-being of the Chinese economy and people, what are the main reasons for the Chinese government to allow more flexibility and (probably) substantial yuan appreciation?What are the main reasons for China's government to maintain its current exchange rate policy?