From 2005 to 2009, China's foreign exchange reserves soared from 88187.2 billion yuan to 2399 152 billion yuan, which has been on the rise. There are many reasons, but one thing is very important, that is, the exchange rate reform in China in 2005 made the appreciation of RMB a reality, and it was expected, which made international hot money have a great profit space and poured into the China market.