You can't compare the BTC/USD exchange rates to those from CNY/USD. During the past 12 months, the BTC/USD exchange rates have fluctuated by more than 100% (low of $230 per coin, and high of $460 per coin). On the other hand, what was the peak fluctuation in CNY/USD? The high was $1 = 6.19693 CNY, and the low was $1 =  6.60060 CNY.