It is obvious that RMB appreciates against dollar but depreciates domestically. It is mainly due to the distortion of RMB exchange rate. Actually, there should not be only one price, thus it indicates that there is human intervention in the market. Meanwhile, another reason is due the large gap between RMB purchasing power and commodity price statistics, especially when the statistics of price level failed to reflect the actual situation, thus the currency did not depreciate when it should.
