The appreciation of RMB against USD reached 34%, and the current exchange rate of USD against RMB is 6. 17. At first, the exchange rate of US dollar against RMB was 6.17 * (1+34%) = 8.2678, so the answer was B. The specific derivation process of the formula is somewhat complicated, so I won't write it first.

In fact, at the close of July 2, 2005, the central bank announced the exchange rate reform, and the RMB appreciated by 2% at one time, from the previous 8.2765 to 8. 1 1.